Re: Out of memory exception
Niranjan, On 2/18/21 13:36, Niranjan Rao wrote: First apologies for non tomcat question. I have seen that there is enough expertise here to provide hints and hints are what I am looking for to solve the problem and question is generic enough. I have tried researching problem to best of my abilities. It all happens on Ubuntu 20.04 and JDK 15 We have a java program that regularly throws "java.lang.OutOfMemoryError: Java heap space" exception. Puzzling point is it happens only on one VM. We have a set of two VMs/boxes spawned from same AWS image. Machine class/region is exactly same and since they are from same image, they should be mostly identical except stuff like host name, ip address etc. Number of tasks performed by VMs are comparable and not a significant difference. Yet, one VM never runs of out of memory and other one does. Sometimes it's as soon as half an hour after restarting the process while on the other box process is running for days and no issues. I took memory dumps from both VMs and they look similar. Program is started with -Xmx1g flag and we have taken regular memory dumps. In many cases eclipse MAT reports total memory usage was less than 100MB when program crashed with out of memory exception. Has anyone seen anything similar to this? Identical bits of code behaving differently? What else should I be looking for? What is the load profile of each application/server? You said you aren't running Tomcat, but is load on each of the applications balanced in any way similar to how a web-application load-balancer would work? Sometimes, the answer is simply that one server is doing more work than the other. We have two application servers which are "identical" except that only one of them handles our email queue. Maybe though the "types" of tasks are the same for each server, one of them is getting unlucky and is handling a "big" task that fails each time? Do you have any logging which would indicate which task, ro what kinds of tasks are failing? Do you have a stack trace of the OOME? Do you have a bunch of them (from many separate events)? Do they all look the same? The AWS images are the same, have you upgraded the OS on either one after initial launch, or do you always start fresh with the same image and no "apt-get update" on them. Same JVM and everything on each of them? If you start with -Xmx1G then you should consider also using -Xms1G. IF you have a long-running process which you expect may take up 1G of heap space, go ahead and allocate it all at once instead of wasting time re-sizing the heap a bunch of times on your way up to 1G. -chris - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of memory exception
On 2/18/21 12:53 PM, Shawn Heisey wrote: On 2/18/2021 12:11 PM, Niranjan Rao wrote: Thank you the response. This is not a web application, but a standalone java program. Hence I said it's not a tomcat question, but a generic JVM question. I have been researching about this a lot and based on many mails on this list, lot of people here know about internal behavior of JVM and specs lot better than I do. Apologies for getting that wrong. Is it a custom app or something that you downloaded and installed? Talk to whoever wrote it. They will hopefully know what information is needed to troubleshoot further. Is Java 15 required for the application to function? If you can successfully use Java 11 or even Java 8, you'll be dealing with a far more stable platform. Major show-stopper bugs in Java are rare, but they do happen. I will warn you that although I do recommend downgrading Java for stability purposes, I do not hold out a lot of hope that it will solve this problem. Which garbage collector are you using? I would recommend one of the really stable collectors, like G1. I wrote this wiki page a long time ago that includes garbage collection information for Solr ... I think it would apply well to any application where latency is important than throughput: https://cwiki.apache.org/confluence/display/SOLR/ShawnHeisey Thanks, Shawn - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org I tried talking to the author, myself - but not much luck. Anyways talking with self does not help with new ideas much ;) We added lot of logging and wrote a simple throw away tool to analyze the logs. Even though task counts are similar, there were some time out errors that could be causing the leaks. Currently a patch is deployed and we are waiting to see if it has made any impact. Interesting point was why is one machine getting brunt of bad things. May be we will drop the box and spawn another VM with the assumption that host could be heavily loaded or something similar not easily visible things going on. Your blog entry is very informative. Thank you. Regards, Niranjan - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of memory exception
On 2/18/2021 12:11 PM, Niranjan Rao wrote: Thank you the response. This is not a web application, but a standalone java program. Hence I said it's not a tomcat question, but a generic JVM question. I have been researching about this a lot and based on many mails on this list, lot of people here know about internal behavior of JVM and specs lot better than I do. Apologies for getting that wrong. Is it a custom app or something that you downloaded and installed? Talk to whoever wrote it. They will hopefully know what information is needed to troubleshoot further. Is Java 15 required for the application to function? If you can successfully use Java 11 or even Java 8, you'll be dealing with a far more stable platform. Major show-stopper bugs in Java are rare, but they do happen. I will warn you that although I do recommend downgrading Java for stability purposes, I do not hold out a lot of hope that it will solve this problem. Which garbage collector are you using? I would recommend one of the really stable collectors, like G1. I wrote this wiki page a long time ago that includes garbage collection information for Solr ... I think it would apply well to any application where latency is important than throughput: https://cwiki.apache.org/confluence/display/SOLR/ShawnHeisey Thanks, Shawn - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of memory exception
You need to monitor the JVM through something like visual VM or JConsole. Monitor the heap space. Your gonna have to modify your code to help you understand where the memory leak is occurring. The stack trace should give you an idea of where in your code it is trying to allocate memory. On Thu, Feb 18, 2021 at 2:12 PM Niranjan Rao wrote: > Hi Shawn > > Thank you the response. This is not a web application, but a standalone > java program. Hence I said it's not a tomcat question, but a generic JVM > question. I have been researching about this a lot and based on many > mails on this list, lot of people here know about internal behavior of > JVM and specs lot better than I do. > > Both the boxes are spawned from same AWS image, we build the image. > There is no other difference. Both receive tasks over MQ. Tasks could > be slightly different - like for different users, number of entities > user holds etc, but they should not be too different or kind of should > average out in the long run. We have examined the data for the tasks and > nothing unusual has come out so far. > > Regards, > > Niranjan > On 2/18/21 10:59 AM, Shawn Heisey wrote: > > Regards, > > Niranjan > > > On 2/18/2021 11:36 AM, Niranjan Rao wrote: > >> First apologies for non tomcat question. I have seen that there is > >> enough expertise here to provide hints and hints are what I am > >> looking for to solve the problem and question is generic enough. I > >> have tried researching problem to best of my abilities. > > > > I believe you're right to think this isn't a tomcat question. There > > are a lot of things it could be. Tomcat is a *possible* source, > > though I think the chance of that is low. Without a LOT of info that > > I would probably be useless at interpreting or asking for, it's > > impossible to say for sure. > > > > With problems like this, it is normally the application running inside > > Tomcat that has a problem, not Tomcat itself. You're likely to get a > > lot more useful information if you go to the people responsible for > > those applications. > > > >> We have a java program that regularly throws > >> "java.lang.OutOfMemoryError: Java heap space" exception. Puzzling > >> point is it happens only on one VM. We have a set of two VMs/boxes > >> spawned from same AWS image. Machine class/region is exactly same and > >> since they are from same image, they should be mostly identical > >> except stuff like host name, ip address etc. > >> > >> Number of tasks performed by VMs are comparable and not a significant > >> difference. Yet, one VM never runs of out of memory and other one > >> does. Sometimes it's as soon as half an hour after restarting the > >> process while on the other box process is running for days and no > >> issues. > > > > "Comparable" isn't "identical". > > > > Are they running the same apps? Which apps are involved? Is the one > > that's throwing OOME handling substantially similar requests when > > compared to one that doesn't? Is the request rate nearly the same, or > > is the problematic one handling a lot more? Another applicable > > question, also off topic for this mailing list: Are the apps in both > > cases configured identically? > > > >> I took memory dumps from both VMs and they look similar. Program is > >> started with -Xmx1g flag and we have taken regular memory dumps. In > >> many cases eclipse MAT reports total memory usage was less than 100MB > >> when program crashed with out of memory exception. > > > > That's extremely odd, unless the application requested a REALLY big > > chunk of memory such that the 100MB existing plus the new allocation > > would be larger than the max heap size of 1GB. > > > > Do you have enough free memory that you could increase the max heap to > > 2GB or beyond and see what happens? > > > >> Has anyone seen anything similar to this? Identical bits of code > >> behaving differently? What else should I be looking for? > > > > Earlier you said "comparable" and now you're saying "identical". So I > > have to ask ... which is it? Remember that differences in > > configurations, types of requests, and request load can lead to very > > different requirements, even if the apps running inside Tomcat are the > > same. > > > > Most of my experience in the Java world comes from Solr. Apache Solr > > is a servlet application, and ships with Jetty. Tomcat is not usually > > involved. I joined this mail
Re: Out of memory exception
Have you tried enabling heap dumps on OOM exceptions ( https://docs.oracle.com/javase/8/docs/technotes/guides/troubleshoot/clopts001.html ; HeapDumpOnOutOfMemoryError) and then looking at the heap dump? It should help you identify where the allocated heap is going to, and give you some ideas of where to look next. On Thu, Feb 18, 2021 at 2:12 PM Niranjan Rao wrote: > Hi Shawn > > Thank you the response. This is not a web application, but a standalone > java program. Hence I said it's not a tomcat question, but a generic JVM > question. I have been researching about this a lot and based on many > mails on this list, lot of people here know about internal behavior of > JVM and specs lot better than I do. > > Both the boxes are spawned from same AWS image, we build the image. > There is no other difference. Both receive tasks over MQ. Tasks could > be slightly different - like for different users, number of entities > user holds etc, but they should not be too different or kind of should > average out in the long run. We have examined the data for the tasks and > nothing unusual has come out so far. > > Regards, > > Niranjan > On 2/18/21 10:59 AM, Shawn Heisey wrote: > > Regards, > > Niranjan > > > On 2/18/2021 11:36 AM, Niranjan Rao wrote: > >> First apologies for non tomcat question. I have seen that there is > >> enough expertise here to provide hints and hints are what I am > >> looking for to solve the problem and question is generic enough. I > >> have tried researching problem to best of my abilities. > > > > I believe you're right to think this isn't a tomcat question. There > > are a lot of things it could be. Tomcat is a *possible* source, > > though I think the chance of that is low. Without a LOT of info that > > I would probably be useless at interpreting or asking for, it's > > impossible to say for sure. > > > > With problems like this, it is normally the application running inside > > Tomcat that has a problem, not Tomcat itself. You're likely to get a > > lot more useful information if you go to the people responsible for > > those applications. > > > >> We have a java program that regularly throws > >> "java.lang.OutOfMemoryError: Java heap space" exception. Puzzling > >> point is it happens only on one VM. We have a set of two VMs/boxes > >> spawned from same AWS image. Machine class/region is exactly same and > >> since they are from same image, they should be mostly identical > >> except stuff like host name, ip address etc. > >> > >> Number of tasks performed by VMs are comparable and not a significant > >> difference. Yet, one VM never runs of out of memory and other one > >> does. Sometimes it's as soon as half an hour after restarting the > >> process while on the other box process is running for days and no > >> issues. > > > > "Comparable" isn't "identical". > > > > Are they running the same apps? Which apps are involved? Is the one > > that's throwing OOME handling substantially similar requests when > > compared to one that doesn't? Is the request rate nearly the same, or > > is the problematic one handling a lot more? Another applicable > > question, also off topic for this mailing list: Are the apps in both > > cases configured identically? > > > >> I took memory dumps from both VMs and they look similar. Program is > >> started with -Xmx1g flag and we have taken regular memory dumps. In > >> many cases eclipse MAT reports total memory usage was less than 100MB > >> when program crashed with out of memory exception. > > > > That's extremely odd, unless the application requested a REALLY big > > chunk of memory such that the 100MB existing plus the new allocation > > would be larger than the max heap size of 1GB. > > > > Do you have enough free memory that you could increase the max heap to > > 2GB or beyond and see what happens? > > > >> Has anyone seen anything similar to this? Identical bits of code > >> behaving differently? What else should I be looking for? > > > > Earlier you said "comparable" and now you're saying "identical". So I > > have to ask ... which is it? Remember that differences in > > configurations, types of requests, and request load can lead to very > > different requirements, even if the apps running inside Tomcat are the > > same. > > > > Most of my experience in the Java world comes from Solr. Apache Solr > > is a servlet application, and ships with Jetty. Tomcat is not
Re: Out of memory exception
Hi Shawn Thank you the response. This is not a web application, but a standalone java program. Hence I said it's not a tomcat question, but a generic JVM question. I have been researching about this a lot and based on many mails on this list, lot of people here know about internal behavior of JVM and specs lot better than I do. Both the boxes are spawned from same AWS image, we build the image. There is no other difference. Both receive tasks over MQ. Tasks could be slightly different - like for different users, number of entities user holds etc, but they should not be too different or kind of should average out in the long run. We have examined the data for the tasks and nothing unusual has come out so far. Regards, Niranjan On 2/18/21 10:59 AM, Shawn Heisey wrote: Regards, Niranjan On 2/18/2021 11:36 AM, Niranjan Rao wrote: First apologies for non tomcat question. I have seen that there is enough expertise here to provide hints and hints are what I am looking for to solve the problem and question is generic enough. I have tried researching problem to best of my abilities. I believe you're right to think this isn't a tomcat question. There are a lot of things it could be. Tomcat is a *possible* source, though I think the chance of that is low. Without a LOT of info that I would probably be useless at interpreting or asking for, it's impossible to say for sure. With problems like this, it is normally the application running inside Tomcat that has a problem, not Tomcat itself. You're likely to get a lot more useful information if you go to the people responsible for those applications. We have a java program that regularly throws "java.lang.OutOfMemoryError: Java heap space" exception. Puzzling point is it happens only on one VM. We have a set of two VMs/boxes spawned from same AWS image. Machine class/region is exactly same and since they are from same image, they should be mostly identical except stuff like host name, ip address etc. Number of tasks performed by VMs are comparable and not a significant difference. Yet, one VM never runs of out of memory and other one does. Sometimes it's as soon as half an hour after restarting the process while on the other box process is running for days and no issues. "Comparable" isn't "identical". Are they running the same apps? Which apps are involved? Is the one that's throwing OOME handling substantially similar requests when compared to one that doesn't? Is the request rate nearly the same, or is the problematic one handling a lot more? Another applicable question, also off topic for this mailing list: Are the apps in both cases configured identically? I took memory dumps from both VMs and they look similar. Program is started with -Xmx1g flag and we have taken regular memory dumps. In many cases eclipse MAT reports total memory usage was less than 100MB when program crashed with out of memory exception. That's extremely odd, unless the application requested a REALLY big chunk of memory such that the 100MB existing plus the new allocation would be larger than the max heap size of 1GB. Do you have enough free memory that you could increase the max heap to 2GB or beyond and see what happens? Has anyone seen anything similar to this? Identical bits of code behaving differently? What else should I be looking for? Earlier you said "comparable" and now you're saying "identical". So I have to ask ... which is it? Remember that differences in configurations, types of requests, and request load can lead to very different requirements, even if the apps running inside Tomcat are the same. Most of my experience in the Java world comes from Solr. Apache Solr is a servlet application, and ships with Jetty. Tomcat is not usually involved. I joined this mailing list because I was responsible for Tomcat servers running apps developed in-house, and every once in a while, I needed to ask something tomcat-specific. Thanks, Shawn - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of memory exception
On 2/18/2021 11:36 AM, Niranjan Rao wrote: First apologies for non tomcat question. I have seen that there is enough expertise here to provide hints and hints are what I am looking for to solve the problem and question is generic enough. I have tried researching problem to best of my abilities. I believe you're right to think this isn't a tomcat question. There are a lot of things it could be. Tomcat is a *possible* source, though I think the chance of that is low. Without a LOT of info that I would probably be useless at interpreting or asking for, it's impossible to say for sure. With problems like this, it is normally the application running inside Tomcat that has a problem, not Tomcat itself. You're likely to get a lot more useful information if you go to the people responsible for those applications. We have a java program that regularly throws "java.lang.OutOfMemoryError: Java heap space" exception. Puzzling point is it happens only on one VM. We have a set of two VMs/boxes spawned from same AWS image. Machine class/region is exactly same and since they are from same image, they should be mostly identical except stuff like host name, ip address etc. Number of tasks performed by VMs are comparable and not a significant difference. Yet, one VM never runs of out of memory and other one does. Sometimes it's as soon as half an hour after restarting the process while on the other box process is running for days and no issues. "Comparable" isn't "identical". Are they running the same apps? Which apps are involved? Is the one that's throwing OOME handling substantially similar requests when compared to one that doesn't? Is the request rate nearly the same, or is the problematic one handling a lot more? Another applicable question, also off topic for this mailing list: Are the apps in both cases configured identically? I took memory dumps from both VMs and they look similar. Program is started with -Xmx1g flag and we have taken regular memory dumps. In many cases eclipse MAT reports total memory usage was less than 100MB when program crashed with out of memory exception. That's extremely odd, unless the application requested a REALLY big chunk of memory such that the 100MB existing plus the new allocation would be larger than the max heap size of 1GB. Do you have enough free memory that you could increase the max heap to 2GB or beyond and see what happens? Has anyone seen anything similar to this? Identical bits of code behaving differently? What else should I be looking for? Earlier you said "comparable" and now you're saying "identical". So I have to ask ... which is it? Remember that differences in configurations, types of requests, and request load can lead to very different requirements, even if the apps running inside Tomcat are the same. Most of my experience in the Java world comes from Solr. Apache Solr is a servlet application, and ships with Jetty. Tomcat is not usually involved. I joined this mailing list because I was responsible for Tomcat servers running apps developed in-house, and every once in a while, I needed to ask something tomcat-specific. Thanks, Shawn - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Out of memory exception
Greetings, First apologies for non tomcat question. I have seen that there is enough expertise here to provide hints and hints are what I am looking for to solve the problem and question is generic enough. I have tried researching problem to best of my abilities. It all happens on Ubuntu 20.04 and JDK 15 We have a java program that regularly throws "java.lang.OutOfMemoryError: Java heap space" exception. Puzzling point is it happens only on one VM. We have a set of two VMs/boxes spawned from same AWS image. Machine class/region is exactly same and since they are from same image, they should be mostly identical except stuff like host name, ip address etc. Number of tasks performed by VMs are comparable and not a significant difference. Yet, one VM never runs of out of memory and other one does. Sometimes it's as soon as half an hour after restarting the process while on the other box process is running for days and no issues. I took memory dumps from both VMs and they look similar. Program is started with -Xmx1g flag and we have taken regular memory dumps. In many cases eclipse MAT reports total memory usage was less than 100MB when program crashed with out of memory exception. Has anyone seen anything similar to this? Identical bits of code behaving differently? What else should I be looking for? Regards, Niranjan - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Nick, On 1/25/14, 11:12 AM, Nick Williams wrote: On Jan 24, 2014, at 12:05 PM, Christopher Schultz wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Mark, On 1/24/14, 10:18 AM, Mark H. Wood wrote: On Thu, Jan 23, 2014 at 09:24:41PM -0500, Howard W. Smith, Jr. wrote: On Thu, Jan 23, 2014 at 2:08 PM, André Warnier a...@ice-sa.com wrote: Either people don't read the rules, or they do not understand the rule, or they just ignore it. I agree. As a tomcat/tomee user, I joined the list, primarily, to listen in on topics (that interest me), so I learned, very quickly, that top-posting is not preferred, here. snip / My biggest problem is that the Apache projects aren't all consistent. I'm a contributor to several (including a committer for Logging). Some use only top-posting and discourage bottom-posting. Others (Tomcat) use only bottom-posting and discourage top-posting. It's very frustrating and makes switching between project lists error-prone. I understand. My perspective is that the ASF is not one single community, but a collection of communities. Each project has its own community that is free to choose their mailing list policies, revision-control system (kind of), etc. Not all ASF projects use the same programming language(s), documentation strategies, etc. Singling-out mailing lists is kind of cherry-picking. One could complain about quite a few things. Again, it goes back to the community and what the general preferences are. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJS5n3oAAoJEBzwKT+lPKRYHSEQAMDfKyNHXuFISRmTO0r2i1YI ljNldMkJGMb0D1EajCqfetzpSGG3X0XLOBmz4xRKzGYm4tbuzY1nvVy2e9vRqL2k N0rjcajMEvUf4kj+yDHF6ibk1Rqo6TVGcAmfM2gnsdj7Uu0dI/d77ayEeMI9DdhE xZB5EBbdaCU6Lm6duS88ZzYkNXUsIvxHh1C8MxiTsUGqBZkdd1ERCBHziGPBcuj3 2kVyxuqsZ/pLqasfMSM6fjcHF4ph7wfejidbqHDyn+3Uco4H8y63sljs5rHNPgQn p773IO+GBhjSjQ8QDv443qMZlItdCSQFyLCMUryrwtMoIjgnVnFxaOfPh9sI1e39 mlS/xZpMc/heCeuIV6fMauft+Zmoq34Z6PkBGZnd0tvmuDZ4B9U3opz8+9UOsjsC fJKGvaAJ9zlC3ne/PMyNGJ2LK2eDP7hN6+fhHU2LY2po1wwcwltjvfH86KePuA+K yXjVQmvd2u12fJofn0xnPgDTx/JYCok7r0LTt/d5nBA9OgkuXVlER7uGiAo8Ny1Y HYsWBb2y68hlCk2LgHsh4py8U3DQZRYpS/bKNKqgRPYDikI4CEQGDyMEsAQZbTjy PmjhiofvkGdAwvWcxVH1wAhe00fY7UGOi8v7KYs2PYEJq2WR3mXCOLaWWXbPODEn 75Z18Bzq0HlJfd3c+z3S =TWSF -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
On Jan 24, 2014, at 12:05 PM, Christopher Schultz wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Mark, On 1/24/14, 10:18 AM, Mark H. Wood wrote: On Thu, Jan 23, 2014 at 09:24:41PM -0500, Howard W. Smith, Jr. wrote: On Thu, Jan 23, 2014 at 2:08 PM, André Warnier a...@ice-sa.com wrote: Either people don't read the rules, or they do not understand the rule, or they just ignore it. I agree. As a tomcat/tomee user, I joined the list, primarily, to listen in on topics (that interest me), so I learned, very quickly, that top-posting is not preferred, here. snip / My biggest problem is that the Apache projects aren't all consistent. I'm a contributor to several (including a committer for Logging). Some use only top-posting and discourage bottom-posting. Others (Tomcat) use only bottom-posting and discourage top-posting. It's very frustrating and makes switching between project lists error-prone. Nick - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
On 23 January 2014 20:08, André Warnier a...@ice-sa.com wrote: Ray Holme wrote: Doing anything as root conceals the errors. Tomcat is no exception and changing it to a real user makes your testing complete. Guys, I think that the rule (or should I say suggestion ?) on this list to *not* top-post is not working. Either people don't read the rules, or they do not understand the rule, or they just ignore it. personally i don't like bottom posting, for me that reads way more annoying But that is because i use gmail, and that one already nests it very nicely and collapse all the bottom So you read it already perfectly as if it was a bottom post. So i really find all this in between and bottom post harder to read for this list then any other list i used just because of that i must scan way more through all the replies where the actual replies are I don't mind for this list, so i do what others like to have, but i am very happy that this is one of the few doing this... -- Johan Compagner Servoy
Re: [OT] Out of memory exception - top posting
There are probably lots of reasons for top-posting, and I don't think we can lay the blame on the MS Outlook world. The people I work with use a mixture of Thunderbird, web-based interfaces, and Outlook. Every one of them top-posts :-(. When you click reply in these email clients, they insert the caret at the top of the email with the original email indented below. This is the out of the box default. It can be changed, but most people won't know how/care to/prefer it this way. I think top-posting says a lot about the thought process of the poster. To me it says, my issue, problem, answer, concern is of paramount importance. You should remember everything about my issue. After all, I remember everything about my issue. The attitude is probably not malicious, but more along the lines of a lack of perspective. As long as you can visually distinguish the reply from the original, does it really matter if that reply is above or below the original? When people reply to a thread, as long as their email client indents, you have that clear visual indication. As a programmer, I have seen arguments about indentation and brace position. This smacks to me as one of those. Personally I think that life really is too short to get hung up about this. People want help. I joined this mailing list to help them, to kind of pay back for people that had helped me with previous problems. Lets help them. Save your own time and the time of everyone else on the list (and the archives, where useless messages can't be removed) and just skip that step. +1 Personally I find replies to threads that are more conversational, far more offensive than top posting. This isn't facebook. If the reply doesn't provide help to the issue at hand, don't send 2C Chris - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: [OT] Out of memory exception - top posting
From: cjder...@gmail.com [mailto:cjder...@gmail.com] On Behalf Of chris derham Subject: Re: [OT] Out of memory exception - top posting As long as you can visually distinguish the reply from the original, does it really matter if that reply is above or below the original? Always bottom-posting is pretty much as useless and lazy as always top-posting. Many, possibly most, of the messages on this list contain multiple points which need to be answered individually. Neither top- nor bottom-posting works for these; inline responses are required to make sense of the answers. When people reply to a thread, as long as their email client indents, you have that clear visual indication. Except for the few people who like to indent their responses, turning everything into gibberish. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
If I can't figure out what the post is talking about by looking at the first 50-60 lines, I usually just hit D and move on. If, by some miracle, the poster really needed to reach *me*, he may eventually ask why I don't respond, and then I can tell him privately why I find his messages unintelligible. This also limits the effort I waste on messages that are all quotation, with no original content. I suspect that lots of email users expect the UA to do the Right Thing, while UA designers understand that this is a thing which the UA cannot do because it requires understanding of the content. So the UA punts, leaving the cursor at the top of the message, and the trusting user thinks this is what should happen. The *adept* user knows that editing and composition make his work more effective, and is guided by training and experience rather than the UA. -- Mark H. Wood, Lead System Programmer mw...@iupui.edu Machines should not be friendly. Machines should be obedient. signature.asc Description: Digital signature
Re: [OT] Out of memory exception - top posting
On Friday, January 24, 2014 9:46 AM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: cjder...@gmail.com [mailto:cjder...@gmail.com] On Behalf Of chris derham Subject: Re: [OT] Out of memory exception - top posting As long as you can visually distinguish the reply from the original, does it really matter if that reply is above or below the original? Always bottom-posting is pretty much as useless and lazy as always top-posting. Many, possibly most, of the messages on this list contain multiple points which need to be answered individually. Neither top- nor bottom-posting works for these; inline responses are required to make sense of the answers. MY REPLY: In this case, the reply seemed to make sense there, BUT if it makes you happier I will just slap myself again. I get it. When people reply to a thread, as long as their email client indents, you have that clear visual indication. Except for the few people who like to indent their responses, turning everything into gibberish. MY REPLY: Agreed. And by the way - it appears that yahoo is not properly indenting this or my above reply as it ought to. It seems like kind of overkill for me to go and do it for the mailer - but I did it so you can see. So not sure what I will do in the future. - Ray - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
Since this is part of a thread, neither top nor bottom posting makes sense, why include the previous post if we all have access to it in our conversation thread. the only time it makes sense to include it, would be when you reply in line to multiple questions with multiple answers. there, that should put a lid on it ;)
Re: [OT] Out of memory exception - top posting
On Thu, Jan 23, 2014 at 09:24:41PM -0500, Howard W. Smith, Jr. wrote: On Thu, Jan 23, 2014 at 2:08 PM, André Warnier a...@ice-sa.com wrote: Either people don't read the rules, or they do not understand the rule, or they just ignore it. I agree. As a tomcat/tomee user, I joined the list, primarily, to listen in on topics (that interest me), so I learned, very quickly, that top-posting is not preferred, here. I may have said this before, but: too bad there is no standard List-Rules: header to provide machine-readable hints, so that a conforming UA could remember them from the subscription response or latest-read message and at least give the user some suggestions. Rules like no attachments could be acted on by the UA; rules like no top-posting require human judgment but could be advertized by the UI. -- Mark H. Wood, Lead System Programmer mw...@iupui.edu Machines should not be friendly. Machines should be obedient. signature.asc Description: Digital signature
Re: [OT] Out of memory exception - top posting
All good ideas. I like the general rule of: be nice or ignore the post. Why should we let a user's post turn our day lousy? I'd hate to see this place turn into what other user forums have become, not naming names. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Filip, On 1/24/14, 10:02 AM, Filip Hanik wrote: Since this is part of a thread, neither top nor bottom posting makes sense, why include the previous post if we all have access to it in our conversation thread. the only time it makes sense to include it, would be when you reply in line to multiple questions with multiple answers. That works great in Gmail, but nowhere else I know. Unless you like opening all dozen messages of a thread in separate windows so you can see them all at once. Not for me, thanks. there, that should put a lid on it ;) I'm assuming that was supposed to be a joke. In either case, I laughed. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJS4sZIAAoJEBzwKT+lPKRYQbsQALsHgZp1quK5DAvIo7P0+996 VNl4SwIc6TEYGHEmWJIbpdEcvR/aaDA8RGzx4oZ9iHIDfQ4yGvR3HiycllQQjdtU Y5s3fvK9wYlDKx+pVWBQIYMSTrhSV3YYtPR8Z7OCBFSBonS0lYvN3OEfOa/f1bSh stT7YoOhiGWNfiG7Urbc5SQwQF1+pLQZNWM3D8GCRqkBUmzRhT5p3SatwGJJHdcS MCaj/ywPJQtwWO5sn1m1Emu+coxNdZj9p7CenwNIFv2JL96Najq5lyooIMNH758q JkwrBeNRS/moHxwRUSST0UDRQN9ftTmNo+8uxPf933KOE8Ijhr06fh8GxevK8HVd iCUJ7bEouBCDv7lZWcfgAlu6Zi/nsJQK3mLwPikN4dQnO3Z5Jtdz1UPrC+LXc+3R zZIw9TmhGEZobRf/A+fG/n4f5OqXzLplwzAZaoq9w/9yv46EMzagXbnS+xltrtbi JMPsj/3diaWJoKEGo5rew3BoryFdXd9cDrb9Z6K9wg2i7JTdaxbtEATHFK8pSz8J jQBwTKDhjd1mt1xxcUGPul88aSP+aLvS1UmteLHEBI/2TUVKhrtFLM9AK152JVsW Gc21YtAO7wPkgJHDuCmiFxaVX2kKwzBlXyf05weHxlRw9hiCI68RNbSL8LteAvKb n7jEq7N9BOtDPZ+aRX+9 =uUQe -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Mark, On 1/24/14, 10:18 AM, Mark H. Wood wrote: On Thu, Jan 23, 2014 at 09:24:41PM -0500, Howard W. Smith, Jr. wrote: On Thu, Jan 23, 2014 at 2:08 PM, André Warnier a...@ice-sa.com wrote: Either people don't read the rules, or they do not understand the rule, or they just ignore it. I agree. As a tomcat/tomee user, I joined the list, primarily, to listen in on topics (that interest me), so I learned, very quickly, that top-posting is not preferred, here. I may have said this before, but: too bad there is no standard List-Rules: header to provide machine-readable hints, so that a conforming UA could remember them from the subscription response or latest-read message and at least give the user some suggestions. Rules like no attachments could be acted on by the UA; rules like no top-posting require human judgment but could be advertized by the UI. Slow down, maverick: let mail UA's properly handle existing standards, first. Then invent new ones. So we'll be ready for this kind of thing in maybe AD 2197. Just what we need: a bunch of nerds all using Eudora, Thunderbird, and Pine yelling at the whole world of people still using Apple Mail, Outlook, etc. whose UAs don't auto-handle those standards. We'd just be moving the problem from users who won't follow the rules to UAs who won't follow the rules. Also, it's hard to enforce context-specific replies (which, to me, are the most useful) rather than strict top-posting versus bottom-posting. That being said, it would be really cool if it were practical to have such list hints. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJS4sd0AAoJEBzwKT+lPKRYN9YP/iDsH0ZVa5QVmA4dnXkKVpp+ nF/MEhvc5ZjmQkg+e+zOJdJzgbcDMJqbEP5iLC0VWUQdEdUYhh3J1uibRbDOhcXp Q9GTn9V/EqEG45g8sPZ8qc7ZynWLytJNX5HIRZ1nLTNOQLbNGy1IuE+9Vyf+r3+8 fGcNiGdZvy1l5+Xi+9j5vJmz1YyEShvzNGGBwW9E4KzLSI6j/njTGYIj3FtGDJYA QzMvky1X++ig0NNCDQRHYu/MYPdy2jVfWtetBUK++tStfeMvDTSpjSE/R6xg0cdR jeh1Q1uCOgNNuL9Fb+w8jMGIZA5agLCLy+1ehgCu3BqwycijdY9dHcJedKNJDuO5 OsK6CktE/N2XiDdYif4d8yGQ16xnEFR1OGyIfKfSDEnqFtxIo7pbOluwOhC0XgIz jfN/yYi52JFw7hIsfQuvXoWZ3QZeEbXJWTUcW8quBaWY+xPMCPPi544YFTRoBjJr 1ylY4rcHH+fa78gYX29bK2t8dUG7/0bsZdOs49Ps6Q2XiZE7wqT6xJT30Wow+2w6 gUBMBaD5Zynl/wigExN5tPZMWV9KrW0RNtXuz6JRI5lUW/P30CrPNIpUTH4szfNC LuZFeMc1L20U5AwykbzMlkGzR4GB/1TuExvESVKt0Ux9Q/k9nOXBQ15yjvgd4leq 5ChZHDksqLMIXqcADs3L =OiyX -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Out of memory exception
Hi, I'm getting out of memory exception errors. Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) Is there anyway to see currently set jvm heap size details? Any linux commands. I have tried creating setenv.sh and putting the new parameters in it. but echo $JAVA_OPTS was not giving any value. So I have put in .bash_profile and run it. Then restarted tomcat6. this is the line I added in .bash_profile. JAVA_OPTS=-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log Also I checked in heap.log where catelina.out can be found. But its not created. Then I touched and restarted. But that also didn't work. What is the right way to do this? -- Randeep Mob: +919447831699[kerala] Mob: +919880050349[B'lore] I blog here: http://www.randeeppr.me/ Follow me Here: http://twitter.com/Randeeppr Poke me here! http://www.facebook.com/Randeeppr A little Linux Help http://www.linuxhelp.in/ Work profile: http://in.linkedin.com/in/randeeppr
Do some research before blogging (was: Out of memory exception)
Randeep writes: I blog here: http://www.randeeppr.me/ Great, but recommending to run Tomcat as root is dangerous nonsense. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of memory exception
On Jan 23, 2014, at 7:43 AM, Randeep randeep...@gmail.com wrote: Hi, I'm getting out of memory exception errors. Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) Is there anyway to see currently set jvm heap size details? Any linux commands. If you run “ps” and “grep” for something like “java”, “catalina”, etc.. you can find your running Tomcat process. On Linux this should show the full command that was run. Alternatively, you could use “jinfo pid”. That will dump a bunch of info including the VM Flags. I have tried creating setenv.sh and putting the new parameters in it. but echo $JAVA_OPTS was not giving any value. How did you install Tomcat? Did you use your distro’s package manager? Did you download from tomcat.apache.org? How are you starting your server? Are you using the included start script? Are you using an init.d (or other) script you created? Are you using commons daemon? So I have put in .bash_profile and run it. Don’t do that. Why would you want these in your bash profile? Then restarted tomcat6. What version exactly? There are quite a few. this is the line I added in .bash_profile. JAVA_OPTS=-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log” Again, don’t put this in your profile. Also I checked in heap.log where catelina.out can be found. But its not created. Then I touched and restarted. But that also didn't work. What is the right way to do this? If you downloaded from tomcat.apache.org and installed from the zip, you’d put them in bin/setenv.sh and it would work. If you’re using a packaged version of Tomcat from your Linux distro, then it may well be different. If you gave more details, perhaps someone on the list could help. Dan -- Randeep Mob: +919447831699[kerala] Mob: +919880050349[B'lore] I blog here: http://www.randeeppr.me/ Follow me Here: http://twitter.com/Randeeppr Poke me here! http://www.facebook.com/Randeeppr A little Linux Help http://www.linuxhelp.in/ Work profile: http://in.linkedin.com/in/randeeppr - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of memory exception
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) If you are trying to serialize huge JSON objects, this is going to happen. I'm not sure if JSON is as smart as the Java Serialization engine, but if you have a circular-reference in your object graph, I'd be willing to bet that the JSON serializer will run forever and exhaust your heap. It's also possible that you simply have a tiny heap and need more, especially if you aren't currently setting any heap parameters. Is there anyway to see currently set jvm heap size details? Any linux commands. You can attach any profiler to your app. Good luck catching this in the act, though, in production. You can also use jmap -heap which comes with the JDK. Just point it at a process and you'll get a heap summary from a running JVM. Make sure your JVM and jmap version match. I have tried creating setenv.sh and putting the new parameters in it. but echo $JAVA_OPTS was not giving any value. setenv.sh is run during Tomcat startup. Running echo $JAVA_OPTS from the command-line isn't going to reveal anything. What you want to do is modify setenv.sh, re-launch Tomcat, and then look at the process command line... something like this: $ ps aux | grep Bootstrap This should give you the whole command-line for Tomcat, and you can verify that your heap options have been set. So I have put in .bash_profile and run it. Then restarted tomcat6. Don't do that: it will only work if you login using bash, and it won't work for other users you may have to restart Tomcat. this is the line I added in .bash_profile. JAVA_OPTS=-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log You'll need to export JAVA_OPTS, otherwise it won't do anything for you. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJS4TM+AAoJEBzwKT+lPKRYfB4QAMP4/MORiK92nK4kJ+KD9alc 2QYcriasb8QkPPgvYHGhGaxeLIprb1TE6tZdMSp08bHadDr+HpSbxi5xq9C6A1RJ fabHj9ShrXqdtTFiewPH3P/ulvaaJNPD1LeIFBwoG7/4vAIGKW48gLhaRUYcbe+z lV2NsZ18u38EZ9KRR8An66jX4PkwMXxl4QdQx5HDmuS/Sx8G7AfDVkuSB5PMNXbg TVlSEz5VeJnEGtBwnjgIa6ZSTv+iIv+nsw4WVuMe+4h1R07e1axxNismkgpUsU46 Ra4P7TssgdrqXFXmX4+kPNzd3xbbhPYIOOrQ0PYt6wGF0Wd9N1r/gvvViDbgghca wp39c3VJM8eE2vy9n0XCGYBkdq2DnRNVFV2y2xnfwecWKtDPEWfklTk8ZvbcAyxe hi3hxQnChCk74nxd/hvI1uNfgHcd/NwtmifwXPNM0BQCZ+AJarCbGca+a/BTTBaX txVIuIEf3jt/gpFu28UI8kt7Hx/PgWJ32QFyIPCbH5EYaSiKSz/Q6wCTvJTbUG4s GCK8AB/rGf1Z8efKlUZw2ESr1yX/VBCu9uOEK/60v+AAthiubq+O2ke1TzWKvy/I MxDhNiMo710w98h5hqIl5SthwXCgv3vEaaiUgDUV8zP3CoOtHL61NNZmLrMBTD2X 18aTMDKJ9BTvoYoZcmyV =IL2E -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of memory exception
Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log' Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat-6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. So I better monitor this and if I get the OOM again I have to increase Max limit! On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) If you are trying to serialize huge JSON objects, this is going to happen. I'm not sure if JSON is as smart as the Java Serialization engine, but if you have a circular-reference in your object graph, I'd be willing to bet that the JSON serializer will run forever and exhaust your heap. It's also possible that you simply have a tiny heap and need more, especially if you aren't currently setting any heap parameters. Is there anyway to see currently set jvm heap size details? Any linux commands. You can attach any profiler to your app. Good luck catching this in the act, though, in production. You can also use jmap -heap which comes with the JDK. Just point it at a process and you'll get a heap summary from a running JVM. Make sure your JVM and jmap version match. I have tried creating setenv.sh and putting the new parameters in it. but echo $JAVA_OPTS was not giving any value. setenv.sh is run during Tomcat startup. Running echo $JAVA_OPTS from the command-line isn't going to reveal anything. What you want to do is modify setenv.sh, re-launch Tomcat, and then look at the process command line... something like this: $ ps aux | grep Bootstrap This should give you the whole command-line for Tomcat, and you can verify that your heap options have been set. So I have put in .bash_profile and run it. Then restarted tomcat6. Don't do that: it will only work if you login using bash, and it won't work for other users you may have to restart Tomcat. this is the line I added in .bash_profile. JAVA_OPTS=-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log You'll need to export JAVA_OPTS, otherwise it won't do anything for you. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJS4TM+AAoJEBzwKT+lPKRYfB4QAMP4/MORiK92nK4kJ+KD9alc 2QYcriasb8QkPPgvYHGhGaxeLIprb1TE6tZdMSp08bHadDr+HpSbxi5xq9C6A1RJ fabHj9ShrXqdtTFiewPH3P
Re: Do some research before blogging (was: Out of memory exception)
Hi, I assume you are talking about my blog posts in http://www.linuxhelp.in/ I'm sorry. I'll correct it. I test everything as root user. So while writing also it came like that. On Thu, Jan 23, 2014 at 6:40 PM, KD kdal...@hotmail.com wrote: Randeep writes: I blog here: http://www.randeeppr.me/ Great, but recommending to run Tomcat as root is dangerous nonsense. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org -- Randeep Mob: +919447831699[kerala] Mob: +919880050349[B'lore] I blog here: http://www.randeeppr.me/ Follow me Here: http://twitter.com/Randeeppr Poke me here! http://www.facebook.com/Randeeppr A little Linux Help http://www.linuxhelp.in/ Work profile: http://in.linkedin.com/in/randeeppr
Re: Out of memory exception
Randeep wrote: Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log' Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat-6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. So I better monitor this and if I get the OOM again I have to increase Max limit! Maybe you should provide a full path for the -Xloggc option ? On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) If you are trying to serialize huge JSON objects, this is going to happen. I'm not sure if JSON is as smart as the Java Serialization engine, but if you have a circular-reference in your object graph, I'd be willing to bet that the JSON serializer will run forever and exhaust your heap. It's also possible that you simply have a tiny heap and need more, especially if you aren't currently setting any heap parameters. Is there anyway to see currently set jvm heap size details? Any linux commands. You can attach any profiler to your app. Good luck catching this in the act, though, in production. You can also use jmap -heap which comes with the JDK. Just point it at a process and you'll get a heap summary from a running JVM. Make sure your JVM and jmap version match. I have tried creating setenv.sh and putting the new parameters in it. but echo $JAVA_OPTS was not giving any value. setenv.sh is run during Tomcat startup. Running echo $JAVA_OPTS from the command-line isn't going to reveal anything. What you want to do is modify setenv.sh, re-launch Tomcat, and then look at the process command line... something like this: $ ps aux | grep Bootstrap This should give you the whole command-line for Tomcat, and you can verify that your heap options have been set. So I have put in .bash_profile and run it. Then restarted tomcat6. Don't do that: it will only work if you login using bash, and it won't work for other users you may have to restart Tomcat. this is the line I added in .bash_profile. JAVA_OPTS=-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log You'll need to export JAVA_OPTS, otherwise it won't do anything for you. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJS4TM+AAoJEBzwKT+lPKRYfB4QAMP4/MORiK92nK4kJ+KD9alc 2QYcriasb8QkPPgvYHGhGaxeLIprb1TE6tZdMSp08bHadDr+HpSbxi5xq9C6A1RJ fabHj9ShrXqdtTFiewPH3P
Re: Out of memory exception
On Jan 23, 2014, at 11:38 AM, Randeep randeep...@gmail.com wrote: Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log’ Based on the name of the file you’re listing, it makes me think you’re confusing what this option does. It’s a garbage collection log. While that shows some info about the heap, it’s mainly targeted towards knowing what’s happening with GC in your process. I can’t help but think you might be looking for -XX:+HeapDumpOnOutOfMemoryError, which generates a heap dump when you get an OOME. Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat-6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. Try using this option instead: -Xloggc:$CATALINA_BASE/logs/heap.log” That should put the file in your “logs” directory. Dan So I better monitor this and if I get the OOM again I have to increase Max limit! On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) If you are trying to serialize huge JSON objects, this is going to happen. I'm not sure if JSON is as smart as the Java Serialization engine, but if you have a circular-reference in your object graph, I'd be willing to bet that the JSON serializer will run forever and exhaust your heap. It's also possible that you simply have a tiny heap and need more, especially if you aren't currently setting any heap parameters. Is there anyway to see currently set jvm heap size details? Any linux commands. You can attach any profiler to your app. Good luck catching this in the act, though, in production. You can also use jmap -heap which comes with the JDK. Just point it at a process and you'll get a heap summary from a running JVM. Make sure your JVM and jmap version match. I have tried creating setenv.sh and putting the new parameters in it. but echo $JAVA_OPTS was not giving any value. setenv.sh is run during Tomcat startup. Running echo $JAVA_OPTS from the command-line isn't going to reveal anything. What you want to do is modify setenv.sh, re-launch Tomcat, and then look at the process command line... something like this: $ ps aux | grep Bootstrap This should give you the whole command-line for Tomcat, and you can verify that your heap options have been set. So I have put in .bash_profile and run it. Then restarted
Re: Out of memory exception
Thanks. That worked. Anything unusual? Garbage collection is happening too often? [root@server logs]# cat /usr/share/apache-tomcat-6.0.37/logs/heap.log 1.910: [GC 16192K-1923K(260160K), 0.0150080 secs] 2.454: [GC 18115K-3151K(260160K), 0.0137140 secs] 2.760: [GC 19343K-3309K(260160K), 0.0058220 secs] 3.648: [GC 19501K-4446K(260160K), 0.0062870 secs] 4.000: [GC 20638K-5063K(260160K), 0.0080940 secs] 4.305: [GC 21255K-6302K(260160K), 0.0060890 secs] 4.598: [GC 22494K-6323K(260160K), 0.0062020 secs] 5.664: [GC 22515K-7098K(260160K), 0.0055070 secs] 6.980: [GC 23290K-8708K(260160K), 0.0176410 secs] 7.332: [GC 24900K-12045K(260160K), 0.0179400 secs] 7.794: [Full GC 24591K-12864K(260160K), 0.2538960 secs] 8.476: [GC 29184K-14200K(260288K), 0.0080560 secs] 8.939: [GC 30520K-15401K(260288K), 0.0407000 secs] 9.379: [GC 31721K-16897K(260288K), 0.0099850 secs] 9.603: [GC 33217K-16652K(260288K), 0.0649140 secs] 10.498: [GC 32972K-17768K(260288K), 0.0068540 secs] 10.885: [GC 34088K-18538K(260288K), 0.0084330 secs] 11.225: [GC 34858K-19584K(260288K), 0.0071730 secs] 11.466: [GC 35904K-20313K(260288K), 0.0050570 secs] 12.128: [GC 36633K-20565K(260288K), 0.0042210 secs] 12.385: [Full GC 26015K-20204K(260288K), 0.2847340 secs] 13.817: [GC 36524K-22174K(260288K), 0.0155690 secs] 14.127: [GC 38494K-25303K(260288K), 0.0816490 secs] 14.671: [GC 41623K-27150K(260288K), 0.0436660 secs] 15.173: [GC 43470K-28757K(260288K), 0.0140720 secs] 15.414: [Full GC 32030K-28926K(260288K), 0.3071990 secs] 65.004: [GC 45310K-31775K(260352K), 0.0105440 secs] [root@server logs]# On Thu, Jan 23, 2014 at 10:33 PM, André Warnier a...@ice-sa.com wrote: Randeep wrote: Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log' Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat- 6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. So I better monitor this and if I get the OOM again I have to increase Max limit! Maybe you should provide a full path for the -Xloggc option ? On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity( AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) If you are trying to serialize huge JSON objects, this is going to happen. I'm not sure if JSON is as smart as the Java Serialization engine, but if you have a circular-reference in your object graph, I'd be willing to bet that the JSON serializer
Re: Out of memory exception
I mean i'd to give full path. like this export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:/usr/share/apache-tomcat-6.0.37/logs/heap.log' On Thu, Jan 23, 2014 at 10:47 PM, Randeep randeep...@gmail.com wrote: Thanks. That worked. Anything unusual? Garbage collection is happening too often? [root@server logs]# cat /usr/share/apache-tomcat-6.0.37/logs/heap.log 1.910: [GC 16192K-1923K(260160K), 0.0150080 secs] 2.454: [GC 18115K-3151K(260160K), 0.0137140 secs] 2.760: [GC 19343K-3309K(260160K), 0.0058220 secs] 3.648: [GC 19501K-4446K(260160K), 0.0062870 secs] 4.000: [GC 20638K-5063K(260160K), 0.0080940 secs] 4.305: [GC 21255K-6302K(260160K), 0.0060890 secs] 4.598: [GC 22494K-6323K(260160K), 0.0062020 secs] 5.664: [GC 22515K-7098K(260160K), 0.0055070 secs] 6.980: [GC 23290K-8708K(260160K), 0.0176410 secs] 7.332: [GC 24900K-12045K(260160K), 0.0179400 secs] 7.794: [Full GC 24591K-12864K(260160K), 0.2538960 secs] 8.476: [GC 29184K-14200K(260288K), 0.0080560 secs] 8.939: [GC 30520K-15401K(260288K), 0.0407000 secs] 9.379: [GC 31721K-16897K(260288K), 0.0099850 secs] 9.603: [GC 33217K-16652K(260288K), 0.0649140 secs] 10.498: [GC 32972K-17768K(260288K), 0.0068540 secs] 10.885: [GC 34088K-18538K(260288K), 0.0084330 secs] 11.225: [GC 34858K-19584K(260288K), 0.0071730 secs] 11.466: [GC 35904K-20313K(260288K), 0.0050570 secs] 12.128: [GC 36633K-20565K(260288K), 0.0042210 secs] 12.385: [Full GC 26015K-20204K(260288K), 0.2847340 secs] 13.817: [GC 36524K-22174K(260288K), 0.0155690 secs] 14.127: [GC 38494K-25303K(260288K), 0.0816490 secs] 14.671: [GC 41623K-27150K(260288K), 0.0436660 secs] 15.173: [GC 43470K-28757K(260288K), 0.0140720 secs] 15.414: [Full GC 32030K-28926K(260288K), 0.3071990 secs] 65.004: [GC 45310K-31775K(260352K), 0.0105440 secs] [root@server logs]# On Thu, Jan 23, 2014 at 10:33 PM, André Warnier a...@ice-sa.com wrote: Randeep wrote: Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log' Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat- 6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. So I better monitor this and if I get the OOM again I have to increase Max limit! Maybe you should provide a full path for the -Xloggc option ? On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity( AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run
Re: Out of memory exception
I have added -XX:+HeapDumpOnOutOfMemoryError also. Thanks. On Thu, Jan 23, 2014 at 10:49 PM, Randeep randeep...@gmail.com wrote: I mean i'd to give full path. like this export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:/usr/share/apache-tomcat-6.0.37/logs/heap.log' On Thu, Jan 23, 2014 at 10:47 PM, Randeep randeep...@gmail.com wrote: Thanks. That worked. Anything unusual? Garbage collection is happening too often? [root@server logs]# cat /usr/share/apache-tomcat-6.0.37/logs/heap.log 1.910: [GC 16192K-1923K(260160K), 0.0150080 secs] 2.454: [GC 18115K-3151K(260160K), 0.0137140 secs] 2.760: [GC 19343K-3309K(260160K), 0.0058220 secs] 3.648: [GC 19501K-4446K(260160K), 0.0062870 secs] 4.000: [GC 20638K-5063K(260160K), 0.0080940 secs] 4.305: [GC 21255K-6302K(260160K), 0.0060890 secs] 4.598: [GC 22494K-6323K(260160K), 0.0062020 secs] 5.664: [GC 22515K-7098K(260160K), 0.0055070 secs] 6.980: [GC 23290K-8708K(260160K), 0.0176410 secs] 7.332: [GC 24900K-12045K(260160K), 0.0179400 secs] 7.794: [Full GC 24591K-12864K(260160K), 0.2538960 secs] 8.476: [GC 29184K-14200K(260288K), 0.0080560 secs] 8.939: [GC 30520K-15401K(260288K), 0.0407000 secs] 9.379: [GC 31721K-16897K(260288K), 0.0099850 secs] 9.603: [GC 33217K-16652K(260288K), 0.0649140 secs] 10.498: [GC 32972K-17768K(260288K), 0.0068540 secs] 10.885: [GC 34088K-18538K(260288K), 0.0084330 secs] 11.225: [GC 34858K-19584K(260288K), 0.0071730 secs] 11.466: [GC 35904K-20313K(260288K), 0.0050570 secs] 12.128: [GC 36633K-20565K(260288K), 0.0042210 secs] 12.385: [Full GC 26015K-20204K(260288K), 0.2847340 secs] 13.817: [GC 36524K-22174K(260288K), 0.0155690 secs] 14.127: [GC 38494K-25303K(260288K), 0.0816490 secs] 14.671: [GC 41623K-27150K(260288K), 0.0436660 secs] 15.173: [GC 43470K-28757K(260288K), 0.0140720 secs] 15.414: [Full GC 32030K-28926K(260288K), 0.3071990 secs] 65.004: [GC 45310K-31775K(260352K), 0.0105440 secs] [root@server logs]# On Thu, Jan 23, 2014 at 10:33 PM, André Warnier a...@ice-sa.com wrote: Randeep wrote: Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log' Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat- 6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. So I better monitor this and if I get the OOM again I have to increase Max limit! Maybe you should provide a full path for the -Xloggc option ? On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity( AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java: 572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503
Re: Out of memory exception
On Jan 23, 2014, at 12:22 PM, Randeep randeep...@gmail.com wrote: I have added -XX:+HeapDumpOnOutOfMemoryError also. Thanks. Please stop top posting. Post your comments inline or at the bottom, like everyone else. It makes following the conversation much easier. Dan On Thu, Jan 23, 2014 at 10:49 PM, Randeep randeep...@gmail.com wrote: I mean i'd to give full path. like this export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:/usr/share/apache-tomcat-6.0.37/logs/heap.log' On Thu, Jan 23, 2014 at 10:47 PM, Randeep randeep...@gmail.com wrote: Thanks. That worked. Anything unusual? Garbage collection is happening too often? [root@server logs]# cat /usr/share/apache-tomcat-6.0.37/logs/heap.log 1.910: [GC 16192K-1923K(260160K), 0.0150080 secs] 2.454: [GC 18115K-3151K(260160K), 0.0137140 secs] 2.760: [GC 19343K-3309K(260160K), 0.0058220 secs] 3.648: [GC 19501K-4446K(260160K), 0.0062870 secs] 4.000: [GC 20638K-5063K(260160K), 0.0080940 secs] 4.305: [GC 21255K-6302K(260160K), 0.0060890 secs] 4.598: [GC 22494K-6323K(260160K), 0.0062020 secs] 5.664: [GC 22515K-7098K(260160K), 0.0055070 secs] 6.980: [GC 23290K-8708K(260160K), 0.0176410 secs] 7.332: [GC 24900K-12045K(260160K), 0.0179400 secs] 7.794: [Full GC 24591K-12864K(260160K), 0.2538960 secs] 8.476: [GC 29184K-14200K(260288K), 0.0080560 secs] 8.939: [GC 30520K-15401K(260288K), 0.0407000 secs] 9.379: [GC 31721K-16897K(260288K), 0.0099850 secs] 9.603: [GC 33217K-16652K(260288K), 0.0649140 secs] 10.498: [GC 32972K-17768K(260288K), 0.0068540 secs] 10.885: [GC 34088K-18538K(260288K), 0.0084330 secs] 11.225: [GC 34858K-19584K(260288K), 0.0071730 secs] 11.466: [GC 35904K-20313K(260288K), 0.0050570 secs] 12.128: [GC 36633K-20565K(260288K), 0.0042210 secs] 12.385: [Full GC 26015K-20204K(260288K), 0.2847340 secs] 13.817: [GC 36524K-22174K(260288K), 0.0155690 secs] 14.127: [GC 38494K-25303K(260288K), 0.0816490 secs] 14.671: [GC 41623K-27150K(260288K), 0.0436660 secs] 15.173: [GC 43470K-28757K(260288K), 0.0140720 secs] 15.414: [Full GC 32030K-28926K(260288K), 0.3071990 secs] 65.004: [GC 45310K-31775K(260352K), 0.0105440 secs] [root@server logs]# On Thu, Jan 23, 2014 at 10:33 PM, André Warnier a...@ice-sa.com wrote: Randeep wrote: Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log' Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat- 6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. So I better monitor this and if I get the OOM again I have to increase Max limit! Maybe you should provide a full path for the -Xloggc option ? On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity( AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java: 572) at java.lang.StringBuffer.append
Re: Out of memory exception
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 11:38 AM, Randeep wrote: Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log' Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat-6.0.37/conf/logging.properties - -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. You should use a full path in Xloggc:heap so you always know where the file is. As it stands, it will be in the CWD of the JVM process. Not sure where that is, because you can run startup.sh from anywhere. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJS4VJYAAoJEBzwKT+lPKRYhgwP/RZq8grS3/bFNdQL69AV05EF lRTQWinc6rC9Au3Nqw2u0coydpyspNYJemLJaRgTAN0NPlKMU1mZBcqOrFftnt7R nUffJeql5Zx2Ef5uT9NhPlLnJpwuSR3oMHk/hs6qiokZaLs5uqzCk/e1/JcH2qi6 Yjnuhfx5wFUO4S6ld0datFmChLFs6XySfhi+2CilFo2Kw4pkdM2Otnf8hD72FW6k zUGomd9AQw/Jj9/+EojyNYVO/dbcBF5Qa2mnt1PO1tE39x7G7TziQgY4My06MXXV xTrVkkPqYaKerA6JHK89GRHqZFOV6/acOZ8PE1BDQ6cb4EhY+FeyEI8CKo18kUDd XoUttISMIElnCpjbNPoxLDbt66CrUIb1gz8Xe2YxWFMib9V1Seq0xvmMarbUTXRg aeql1spWOEJJf3GR/qpu13AmPt9lTD2t0gDpY+MeB/guShJxm1pU3TEJ/V7FwxBn vJWfNI82RBHCzlUt0aGryYjw19bmgc3Z1st2GMU8WGiDeYFx6nrMUn1QzsWi7QuW k6ZVhkc0mdzXBVyeymWcZE87IKNvlwtOJF3rUpQkvSBxOw3ivLvDVILWLKaDxXCk ncPTFenz4ETNJ0bPQFcf3q45+Bb03YiifqTfNlnE5/+57fvd+J0INYIWlI91rsHP sjppv6K1BzrAe5LPvGTN =WyIX -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of memory exception
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 12:17 PM, Randeep wrote: Thanks. That worked. Anything unusual? Garbage collection is happening too often? [root@server logs]# cat /usr/share/apache-tomcat-6.0.37/logs/heap.log 1.910: [GC 16192K-1923K(260160K), 0.0150080 secs] 2.454: [GC 18115K-3151K(260160K), 0.0137140 secs] 2.760: [GC 19343K-3309K(260160K), 0.0058220 secs] 3.648: [GC 19501K-4446K(260160K), 0.0062870 secs] 4.000: [GC 20638K-5063K(260160K), 0.0080940 secs] 4.305: [GC 21255K-6302K(260160K), 0.0060890 secs] 4.598: [GC 22494K-6323K(260160K), 0.0062020 secs] 5.664: [GC 22515K-7098K(260160K), 0.0055070 secs] 6.980: [GC 23290K-8708K(260160K), 0.0176410 secs] 7.332: [GC 24900K-12045K(260160K), 0.0179400 secs] 7.794: [Full GC 24591K-12864K(260160K), 0.2538960 secs] 8.476: [GC 29184K-14200K(260288K), 0.0080560 secs] 8.939: [GC 30520K-15401K(260288K), 0.0407000 secs] 9.379: [GC 31721K-16897K(260288K), 0.0099850 secs] 9.603: [GC 33217K-16652K(260288K), 0.0649140 secs] 10.498: [GC 32972K-17768K(260288K), 0.0068540 secs] 10.885: [GC 34088K-18538K(260288K), 0.0084330 secs] 11.225: [GC 34858K-19584K(260288K), 0.0071730 secs] 11.466: [GC 35904K-20313K(260288K), 0.0050570 secs] 12.128: [GC 36633K-20565K(260288K), 0.0042210 secs] 12.385: [Full GC 26015K-20204K(260288K), 0.2847340 secs] 13.817: [GC 36524K-22174K(260288K), 0.0155690 secs] 14.127: [GC 38494K-25303K(260288K), 0.0816490 secs] 14.671: [GC 41623K-27150K(260288K), 0.0436660 secs] 15.173: [GC 43470K-28757K(260288K), 0.0140720 secs] 15.414: [Full GC 32030K-28926K(260288K), 0.3071990 secs] 65.004: [GC 45310K-31775K(260352K), 0.0105440 secs] [root@server logs]# Do what I do: write a Perl script to pull-apart the data from above into something useful, like CSV, and then use a spreadsheet to graph the data. Graphing heap data *really* helps. Looking at numbers is ... useless. - -chris On Thu, Jan 23, 2014 at 10:33 PM, André Warnier a...@ice-sa.com wrote: Randeep wrote: Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log' Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat- 6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager - -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. So I better monitor this and if I get the OOM again I have to increase Max limit! Maybe you should provide a full path for the -Xloggc option ? On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity( AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503
Re: Out of memory exception
Doing anything as root conceals the errors. Tomcat is no exception and changing it to a real user makes your testing complete. On Thursday, January 23, 2014 12:36 PM, Daniel Mikusa dmik...@gopivotal.com wrote: On Jan 23, 2014, at 11:38 AM, Randeep randeep...@gmail.com wrote: Hi all, Thanks a lot for valuable points. Here the information you guys asked and the changes I made. OS : CentOS release 5.4 (Final) httpd-2.2.3-65.el5.centos(front_end) +(mod_jk)+ apache-tomcat-6.0.37 I installed httpd using yum. Downloaded tomcat from Apache as compressed archive(tar.gz) I'm using following startup script. [root@server ~]# cat /etc/init.d/tomcat6 #!/bin/bash # description: Tomcat Start Stop Restart # processname: tomcat # chkconfig: 234 20 80 JAVA_HOME=/usr/java/default export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH CATALINA_HOME=/usr/share/apache-tomcat-6.0.37 case $1 in start) sh $CATALINA_HOME/bin/startup.sh ;; stop) sh $CATALINA_HOME/bin/shutdown.sh ;; restart) sh $CATALINA_HOME/bin/shutdown.sh sh $CATALINA_HOME/bin/startup.sh ;; esac exit 0 As you said, I removed the JAVA_OPTS declaration from .bash_profile and I have created setenv.sh and set JAVA_OPTS in it. [root@server bin]# pwd /usr/share/apache-tomcat-6.0.37/bin [root@server bin]# cat setenv.sh export JAVA_OPTS='-Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log’ Based on the name of the file you’re listing, it makes me think you’re confusing what this option does. It’s a garbage collection log. While that shows some info about the heap, it’s mainly targeted towards knowing what’s happening with GC in your process. I can’t help but think you might be looking for -XX:+HeapDumpOnOutOfMemoryError, which generates a heap dump when you get an OOME. Now it shows in grep. [root@server bin]# ps aux | grep Bootstrap root 1100 33.7 5.4 707052 95240 pts/0 Sl 11:29 0:06 /usr/java/default/bin/java -Djava.util.logging.config.file=/usr/share/apache-tomcat-6.0.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Xms256m -Xmx512m -Xss512k -verbose:gc -Xloggc:heap.log -Djava.endorsed.dirs=/usr/share/apache-tomcat-6.0.37/endorsed -classpath /usr/share/apache-tomcat-6.0.37/bin/bootstrap.jar -Dcatalina.base=/usr/share/apache-tomcat-6.0.37 -Dcatalina.home=/usr/share/apache-tomcat-6.0.37 -Djava.io.tmpdir=/usr/share/apache-tomcat-6.0.37/temp org.apache.catalina.startup.Bootstrap start root 1158 0.0 0.0 3932 692 pts/0 R+ 11:29 0:00 grep Bootstrap [root@server bin]# But nothing came in heap.log. Try using this option instead: -Xloggc:$CATALINA_BASE/logs/heap.log” That should put the file in your “logs” directory. Dan So I better monitor this and if I get the OOM again I have to increase Max limit! On Thu, Jan 23, 2014 at 8:50 PM, Christopher Schultz ch...@christopherschultz.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Randeep, On 1/23/14, 7:43 AM, Randeep wrote: I'm getting out of memory exception errors. :( Exception in thread Timer-1 java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:2882) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:100) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:572) at java.lang.StringBuffer.append(StringBuffer.java:320) at org.json.JSONArray.toString(JSONArray.java:834) at org.json.JSONObject.valueToString(JSONObject.java:1359) at org.json.JSONObject.toString(JSONObject.java:1233) at com.xxx.xxx.servlet.WServlet.writeProgramJson(WServlet.java:503) at com.xxx.xxx.servlet.WServlet$1.run(WServlet.java:414) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462) If you are trying to serialize huge JSON objects, this is going to happen. I'm not sure if JSON is as smart as the Java Serialization engine, but if you have a circular-reference in your object graph, I'd be willing to bet that the JSON serializer will run forever and exhaust your heap. It's also possible that you simply have a tiny heap and need more, especially if you aren't currently setting any heap parameters. Is there anyway to see currently set jvm heap size details? Any linux commands. You can attach any profiler to your app. Good luck catching this in the act, though, in production. You can also use jmap -heap which comes with the JDK. Just point it at a process and you'll get a heap summary from a running JVM. Make sure your JVM and jmap version match. I have tried creating setenv.sh and putting the new parameters in it. but echo $JAVA_OPTS was not giving any value. setenv.sh is run during Tomcat startup. Running echo $JAVA_OPTS from the command-line isn't going to reveal anything. What you want to do is modify setenv.sh, re-launch Tomcat, and then look at the process command line... something
Re: [OT] Out of memory exception - top posting
Ray Holme wrote: Doing anything as root conceals the errors. Tomcat is no exception and changing it to a real user makes your testing complete. Guys, I think that the rule (or should I say suggestion ?) on this list to *not* top-post is not working. Either people don't read the rules, or they do not understand the rule, or they just ignore it. Anyway, it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
On Thu, Jan 23, 2014 at 12:08 PM, André Warnier a...@ice-sa.com wrote: it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? Does this topic go back to the usenet days of the early 80s? Top posting vs bottom posting? It is so customary to simply reply to people in the MS Outlook world that all of those people get used to top posting, because they know nothing different, until they come here. I'm getting used to bottom posting, but it drives my co-workers crazy and is not proper form where I work. I think this we might be chasing the wind here. Leo - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
2014/1/23 André Warnier a...@ice-sa.com: Ray Holme wrote: Doing anything as root conceals the errors. Tomcat is no exception and changing it to a real user makes your testing complete. Guys, I think that the rule (or should I say suggestion ?) on this list to *not* top-post is not working. Either people don't read the rules, or they do not understand the rule, or they just ignore it. Anyway, it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? One of those rules is do not use HTML formatting. So you cannot use bold. One of real issues that I fixed several times is that the references to our mailing list should point to the Mailing Lists page (http://tomcat.apache.org/lists.html#tomcat-users), instead of just providing the subscription address. I might have missed to fix some of those. - just ignore top-posts ? That is what I usually do. - drop the rule ? Best regards, Konstantin Kolinko - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
On 1/23/2014 11:21 AM, Leo Donahue wrote: On Thu, Jan 23, 2014 at 12:08 PM, André Warnier a...@ice-sa.com wrote: it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? Does this topic go back to the usenet days of the early 80s? Top posting vs bottom posting? It is so customary to simply reply to people in the MS Outlook world that all of those people get used to top posting, because they know nothing different, until they come here. I'm getting used to bottom posting, but it drives my co-workers crazy and is not proper form where I work. I think this we might be chasing the wind here. Leo There are probably lots of reasons for top-posting, and I don't think we can lay the blame on the MS Outlook world. The people I work with use a mixture of Thunderbird, web-based interfaces, and Outlook. Every one of them top-posts :-(. I think top-posting says a lot about the thought process of the poster. To me it says, my issue, problem, answer, concern is of paramount importance. You should remember everything about my issue. After all, I remember everything about my issue. The attitude is probably not malicious, but more along the lines of a lack of perspective. Two things to consider when posting to a public mailing list: 1. There are lots of topics - people don't keep up with all of them 2. Many people have more pressing concerns - your issue isn't one of them In a work environment, top-posting may be rational since hopefully you're getting mail on issues of primary importance. In an open mailing list, bottom-posting or in-line posting makes sense because contributors are doing this on a voluntary basis (beats rewriting a build process in Maven for example :-p). Also, your concern is most likely not their concern. In short, the contributors aren't spending as many cycles on the issue as the original poster is. This goes along with providing a complete description of your environment and how you arrived at the problem. Within a work environment, there's shared knowledge. In a public mailing list, no one knows but the original poster. Oh, and brevity is probably a good model (shoot me now). . . . . just my two cents /mde/ - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
Unfortunately that will mean that all folks who use yahoo need to copy and paste all messages. I have tried reply and reply to conversation but with the new yahoo paradigm (a couple months ago, they changed things) - it no longer allows me to post inside of an email as it did in the past. I understand your frustration and will try to always fully copy a message to an editor in order to allow me to edit and NOT top post. Apologies and my 1/2 cent. rah On Thursday, January 23, 2014 2:44 PM, Mark Eggers its_toas...@yahoo.com wrote: On 1/23/2014 11:21 AM, Leo Donahue wrote: On Thu, Jan 23, 2014 at 12:08 PM, André Warnier a...@ice-sa.com wrote: it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? Does this topic go back to the usenet days of the early 80s? Top posting vs bottom posting? It is so customary to simply reply to people in the MS Outlook world that all of those people get used to top posting, because they know nothing different, until they come here. I'm getting used to bottom posting, but it drives my co-workers crazy and is not proper form where I work. I think this we might be chasing the wind here. Leo There are probably lots of reasons for top-posting, and I don't think we can lay the blame on the MS Outlook world. The people I work with use a mixture of Thunderbird, web-based interfaces, and Outlook. Every one of them top-posts :-(. I think top-posting says a lot about the thought process of the poster. To me it says, my issue, problem, answer, concern is of paramount importance. You should remember everything about my issue. After all, I remember everything about my issue. The attitude is probably not malicious, but more along the lines of a lack of perspective. Two things to consider when posting to a public mailing list: 1. There are lots of topics - people don't keep up with all of them 2. Many people have more pressing concerns - your issue isn't one of them In a work environment, top-posting may be rational since hopefully you're getting mail on issues of primary importance. In an open mailing list, bottom-posting or in-line posting makes sense because contributors are doing this on a voluntary basis (beats rewriting a build process in Maven for example :-p). Also, your concern is most likely not their concern. In short, the contributors aren't spending as many cycles on the issue as the original poster is. This goes along with providing a complete description of your environment and how you arrived at the problem. Within a work environment, there's shared knowledge. In a public mailing list, no one knows but the original poster. Oh, and brevity is probably a good model (shoot me now). . . . . just my two cents /mde/ - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: [OT] Out of memory exception - top posting
From: Ray Holme [mailto:rayho...@yahoo.com] Subject: Re: [OT] Out of memory exception - top posting Unfortunately that will mean that all folks who use yahoo need to copy and paste all messages. It appears that Mark E has no trouble with in-line posting from yahoo; perhaps he can share his technique. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
Reply at the bottom . . . and one in-line for fun. On Thursday, January 23, 2014 12:22 PM, Ray Holme rayho...@yahoo.com wrote: Unfortunately that will mean that all folks who use yahoo need to copy and paste all messages. I have tried reply and reply to conversation but with the new yahoo paradigm (a couple months ago, they changed things) - it no longer allows me to post inside of an email as it did in the past. This is an in-line reply with Yahoo's web mail interface. I understand your frustration and will try to always fully copy a message to an editor in order to allow me to edit and NOT top post. Apologies and my 1/2 cent. rah On Thursday, January 23, 2014 2:44 PM, Mark Eggers its_toas...@yahoo.com wrote: On 1/23/2014 11:21 AM, Leo Donahue wrote: On Thu, Jan 23, 2014 at 12:08 PM, André Warnier a...@ice-sa.com wrote: it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? Does this topic go back to the usenet days of the early 80s? Top posting vs bottom posting? It is so customary to simply reply to people in the MS Outlook world that all of those people get used to top posting, because they know nothing different, until they come here. I'm getting used to bottom posting, but it drives my co-workers crazy and is not proper form where I work. I think this we might be chasing the wind here. Leo There are probably lots of reasons for top-posting, and I don't think we can lay the blame on the MS Outlook world. The people I work with use a mixture of Thunderbird, web-based interfaces, and Outlook. Every one of them top-posts :-(. I think top-posting says a lot about the thought process of the poster. To me it says, my issue, problem, answer, concern is of paramount importance. You should remember everything about my issue. After all, I remember everything about my issue. The attitude is probably not malicious, but more along the lines of a lack of perspective. Two things to consider when posting to a public mailing list: 1. There are lots of topics - people don't keep up with all of them 2. Many people have more pressing concerns - your issue isn't one of them In a work environment, top-posting may be rational since hopefully you're getting mail on issues of primary importance. In an open mailing list, bottom-posting or in-line posting makes sense because contributors are doing this on a voluntary basis (beats rewriting a build process in Maven for example :-p). Also, your concern is most likely not their concern. In short, the contributors aren't spending as many cycles on the issue as the original poster is. This goes along with providing a complete description of your environment and how you arrived at the problem. Within a work environment, there's shared knowledge. In a public mailing list, no one knows but the original poster. Oh, and brevity is probably a good model (shoot me now). . . . . just my two cents /mde/ Hmm, I normally don't use the web interface. I access my Yahoo account via IMAP and Thunderbird. Just for kicks, I thought I would access it via the web interface and reply to your message. On a Windows box, Ctrl-End gets me to the end of the message. I then trim off the mailing list footer, and finally type in my reply. Voila - no top-posting. I don't know about the tablet version or phone version of Yahoo! mail. /mde/ - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
On Thursday, January 23, 2014 3:41 PM, Mark Eggers its_toas...@yahoo.com wrote: Reply at the bottom . . . and one in-line for fun. On Thursday, January 23, 2014 12:22 PM, Ray Holme rayho...@yahoo.com wrote: Unfortunately that will mean that all folks who use yahoo need to copy and paste all messages. I have tried reply and reply to conversation but with the new yahoo paradigm (a couple months ago, they changed things) - it no longer allows me to post inside of an email as it did in the past. This is an in-line reply with Yahoo's web mail interface. I understand your frustration and will try to always fully copy a message to an editor in order to allow me to edit and NOT top post. Apologies and my 1/2 cent. rah On Thursday, January 23, 2014 2:44 PM, Mark Eggers its_toas...@yahoo.com wrote: On 1/23/2014 11:21 AM, Leo Donahue wrote: On Thu, Jan 23, 2014 at 12:08 PM, André Warnier a...@ice-sa.com wrote: it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? Does this topic go back to the usenet days of the early 80s? Top posting vs bottom posting? It is so customary to simply reply to people in the MS Outlook world that all of those people get used to top posting, because they know nothing different, until they come here. I'm getting used to bottom posting, but it drives my co-workers crazy and is not proper form where I work. I think this we might be chasing the wind here. Leo There are probably lots of reasons for top-posting, and I don't think we can lay the blame on the MS Outlook world. The people I work with use a mixture of Thunderbird, web-based interfaces, and Outlook. Every one of them top-posts :-(. I think top-posting says a lot about the thought process of the poster. To me it says, my issue, problem, answer, concern is of paramount importance. You should remember everything about my issue. After all, I remember everything about my issue. The attitude is probably not malicious, but more along the lines of a lack of perspective. Two things to consider when posting to a public mailing list: 1. There are lots of topics - people don't keep up with all of them 2. Many people have more pressing concerns - your issue isn't one of them In a work environment, top-posting may be rational since hopefully you're getting mail on issues of primary importance. In an open mailing list, bottom-posting or in-line posting makes sense because contributors are doing this on a voluntary basis (beats rewriting a build process in Maven for example :-p). Also, your concern is most likely not their concern. In short, the contributors aren't spending as many cycles on the issue as the original poster is. This goes along with providing a complete description of your environment and how you arrived at the problem. Within a work environment, there's shared knowledge. In a public mailing list, no one knows but the original poster. Oh, and brevity is probably a good model (shoot me now). . . . . just my two cents /mde/ Hmm, I normally don't use the web interface. I access my Yahoo account via IMAP and Thunderbird. Just for kicks, I thought I would access it via the web interface and reply to your message. On a Windows box, Ctrl-End gets me to the end of the message. I then trim off the mailing list footer, and finally type in my reply. Voila - no top-posting. I don't know about the tablet version or phone version of Yahoo! mail. /mde/ My bad - I did NOT see the button to include message history. Sorry to all. And I am not using a table, just the web interface with Linux. I dug a while and there it was.
Re: [OT] Out of memory exception - top posting
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 André, On 1/23/14, 2:08 PM, André Warnier wrote: Ray Holme wrote: Doing anything as root conceals the errors. Tomcat is no exception and changing it to a real user makes your testing complete. Guys, I think that the rule (or should I say suggestion ?) on this list to *not* top-post is not working. Either people don't read the rules, or they do not understand the rule, or they just ignore it. Anyway, it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? - -1 to all three. Tomcat (and the ASF as a whole) is a community, and our job as ... vocal? members of the community is to help meet the needs of that community. If top-posting irritates us, we just have to ask that people help us help themselves. But simply summarily ignoring top-posted replies is childish. If the top-posting becomes intolerable (it happens sometimes, especially when there is a complex thread going on and someone - usually the OP - continues to top-post), then feel free to stop replying. But don't crucify people for top-posting alone. Some people can't figure out how to reply properly. Just gently remind posters of the rules and get back to business. There is no need to reply to a post by simply saying Don't top-post and leaving it at that. Save your own time and the time of everyone else on the list (and the archives, where useless messages can't be removed) and just skip that step. If you want to reply meaningfully, feel free to add the don't top-post somewhere in your reply. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJS4ZIdAAoJEBzwKT+lPKRY+NIP/Aptl3OrcVu85Gp05ekxdds5 x1XmCBkdNnlz9ihom4hSvlm633Xg1Im1jQi+tiyY1ZdAgpzYV3K8zM5CykhuiuxN aWjvlCcKKKkH+6u5WfZQF3LwUFkRFz9WaHC+9LqMuDbHfdVJEuszkzRve6/njtcs FZ54RQQ2Af3x+8UWe9fdb9OoQFCebG08UqB2IgaYIQ7dp3nqlLke/+t+l3Ns0dU1 SLBQbZP3pcMiY9tU4cPTO+F025oITjdAsj8x6JapkA2IapxEsSQCG/35rERFDPUP mZF9jc1r8jz7PtgfcdSD6FfHi5AZfya4OJxzZKRQWEgm1Lp2UOeKaBwszNSojVqq kfxeDjVeFdRxsXEY1a8rlNNNXbfDVjeHV2IOm1LgzelpWlYf9daRKPo0dVGxOnRK 4Blkj1LcNbInWBBk8DfPfpfz3svsn6wNcv9qhgCCNJC5e3jyCjI5aahEij8lKqha hHe9u9xqaPp+47AmeCKa5QTaRuJE8ExTnpaUNNTRkmYnTmy/mLqouEsMHVbRlqgX ujvhg4jqP/ANlbe+ZXpHBeBjDeAWhqhP6f9wWRibZ8BXQdOPFpyNfIrHFpaMRsto jWcHpF2qHcOPuY3xSWvTPOwUCaVpWQt3IPWqIf+rVbdtCkzhd+jL+smo9UX82MaB PS8sanZTLZ0e8UrxTxzm =nlVi -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
On Jan 23, 2014, at 2:05 PM, Christopher Schultz ch...@christopherschultz.net wrote: Some people can't figure out how to reply properly. Just gently remind posters of the rules and get back to business. There is no need to reply to a post by simply saying Don't top-post and leaving it at that. Save your own time and the time of everyone else on the list (and the archives, where useless messages can't be removed) and just skip that step. If you want to reply meaningfully, feel free to add the don't top-post somewhere in your reply. I agree. For some people, it may be their first post to the group (or even their first post to ANY group). They may simply not know community conventions. Don't want to scare them off. - Milo Hyson Chief Scientist CyberLife Labs, Inc. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
Christopher, Christopher Schultz wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 André, On 1/23/14, 2:08 PM, André Warnier wrote: Ray Holme wrote: Doing anything as root conceals the errors. Tomcat is no exception and changing it to a real user makes your testing complete. Guys, I think that the rule (or should I say suggestion ?) on this list to *not* top-post is not working. Either people don't read the rules, or they do not understand the rule, or they just ignore it. Anyway, it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? - -1 to all three. Tomcat (and the ASF as a whole) is a community, and our job as ... vocal? members of the community is to help meet the needs of that community. If top-posting irritates us, we just have to ask that people help us help themselves. But simply summarily ignoring top-posted replies is childish. If the top-posting becomes intolerable (it happens sometimes, especially when there is a complex thread going on and someone - usually the OP - continues to top-post), then feel free to stop replying. But don't crucify people for top-posting alone. Some people can't figure out how to reply properly. Just gently remind posters of the rules and get back to business. There is no need to reply to a post by simply saying Don't top-post and leaving it at that. Save your own time and the time of everyone else on the list (and the archives, where useless messages can't be removed) and just skip that step. If you want to reply meaningfully, feel free to add the don't top-post somewhere in your reply. In a general sense, I do agree with all of that. Be tolerant of what you receive, and strict in what you produce and that kind of thing. It's just that top-posting /is/ really annoying on this kind of list. And also that it takes quite a lot of energy to politely ask someone to not top-post, and give them the reason why, and point them to the list rules. Might there be some kind of macro in the Tomcat list server, which would allow us to paste such a statement into a response, with just a couple of keystrokes ? As a matter of fact, a few such macros would come in handy. On a historical and statistical base : [TOP] Please don't top-post, because.. [VER] Please provide Tomcat version, Java version, platform OS version [OLD] That version of Tomcat is %d years old. You should upgrade to the latest version, which has many more features and fixes for the latest security issues. [CONF] Can you post the relevant bits of your configuration here (server.xml) ? Please paste it in-line, don't send it as attachment, the list strips them. And remove comments and any sensitive information (passwords etc.) [RTFM] Please check the on-line documentation at http://tomcat.apache.org [SMART] http://www.catb.org/~esr/faqs/smart-questions.html [PAW] Patches are always welcome [HTTPD] This is the Apache Tomcat list, your question relates to Apache httpd, see http://httpd.apache.org [SPEC] Please check the Java Servlet Specification at .. [LAZY] http://lmgtfy.com/ [COMP101] Is this a school exercise ? [BUG] It's not a bug, it's a feature [FEAT] Could you create a Bugzilla entry ? [ASAP] Tomcat is open source and free. This list is manned by volunteers. If you would prefer instant gratification, please consult the list of commercial Tomcat consultants at.. [CAPS] (alias of [ASAP]) [$] (alias of [ASAP]) [CON] It's Context, with a capital C [CON2] Don't do that (put your Context in server.xml). [2C] Just my 2 cent - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 André, On 1/23/14, 6:09 PM, André Warnier wrote: Christopher, Christopher Schultz wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 André, On 1/23/14, 2:08 PM, André Warnier wrote: Ray Holme wrote: Doing anything as root conceals the errors. Tomcat is no exception and changing it to a real user makes your testing complete. Guys, I think that the rule (or should I say suggestion ?) on this list to *not* top-post is not working. Either people don't read the rules, or they do not understand the rule, or they just ignore it. Anyway, it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? - -1 to all three. Tomcat (and the ASF as a whole) is a community, and our job as ... vocal? members of the community is to help meet the needs of that community. If top-posting irritates us, we just have to ask that people help us help themselves. But simply summarily ignoring top-posted replies is childish. If the top-posting becomes intolerable (it happens sometimes, especially when there is a complex thread going on and someone - usually the OP - continues to top-post), then feel free to stop replying. But don't crucify people for top-posting alone. Some people can't figure out how to reply properly. Just gently remind posters of the rules and get back to business. There is no need to reply to a post by simply saying Don't top-post and leaving it at that. Save your own time and the time of everyone else on the list (and the archives, where useless messages can't be removed) and just skip that step. If you want to reply meaningfully, feel free to add the don't top-post somewhere in your reply. In a general sense, I do agree with all of that. Be tolerant of what you receive, and strict in what you produce and that kind of thing. It's just that top-posting /is/ really annoying on this kind of list. And also that it takes quite a lot of energy to politely ask someone to not top-post, and give them the reason why, and point them to the list rules. Might there be some kind of macro in the Tomcat list server, which would allow us to paste such a statement into a response, with just a couple of keystrokes ? As a matter of fact, a few such macros would come in handy. On a historical and statistical base : [TOP] Please don't top-post, because.. [VER] Please provide Tomcat version, Java version, platform OS version [OLD] That version of Tomcat is %d years old. You should upgrade to the latest version, which has many more features and fixes for the latest security issues. [CONF] Can you post the relevant bits of your configuration here (server.xml) ? Please paste it in-line, don't send it as attachment, the list strips them. And remove comments and any sensitive information (passwords etc.) [RTFM] Please check the on-line documentation at http://tomcat.apache.org [SMART] http://www.catb.org/~esr/faqs/smart-questions.html [PAW] Patches are always welcome [HTTPD] This is the Apache Tomcat list, your question relates to Apache httpd, see http://httpd.apache.org [SPEC] Please check the Java Servlet Specification at .. [LAZY] http://lmgtfy.com/ [COMP101] Is this a school exercise ? [BUG] It's not a bug, it's a feature [FEAT] Could you create a Bugzilla entry ? [ASAP] Tomcat is open source and free. This list is manned by volunteers. If you would prefer instant gratification, please consult the list of commercial Tomcat consultants at.. [CAPS] (alias of [ASAP]) [$] (alias of [ASAP]) [CON] It's Context, with a capital C [CON2] Don't do that (put your Context in server.xml). [2C] Just my 2 cent [ROOT] It's ROOT.war -- capitalization matters, even when using a case-insensitive filesystem. - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJS4aryAAoJEBzwKT+lPKRYtLcP/1JHJO1omNO7zgXyl6CN3Kqu D6W3wh8nyABycCDnUxQLDdkVOUe+cUJ/p9eW4U2TVMIp3Iqf9R6umvROSi0PJAu6 4rdGriR5TJbUigNiEy/pTiW06tZgsYH+3LGMetCvfG2tvz1Chd53CxDXAOwHiuFB EGY6YHmJRPDc/6xQadCqRpyKSyfwHfmdCmxg22n+nMWW7cs+wMHdgHInMEj7tv1i BwltfEK7mX27eJ7EsM54bo+96eVRexbjgL7qZ84SagXTk66JxPMXqxaoJyYqPXG8 KI04+Qf37UmrPJXLkJKXmjSzqSAFUV4RZa7D/VlPkBdBKPzqHwUKk3LMT5O27Xez ZioFZrsbxrz+SEEjfRzh3HT67QcQ4L6imiUbuJ/zWfI9bBG9mgwaFyVQvD2kj9d7 8+Gic3xEa/AHM0BTwaQo7GLIihlH1EiTSoX03BRmp4Ch+FPlSBhaUCP1ZanMv7kb YIdvxCcSOCDMulc5/Z0sVESH5Q5D4UNKlRqZZsbH2VjIi4HFoL/b60m7sDsXMjRQ g9GgFeiNVhUHOYwmQhZXN7V9tEgWpk0wzt6q2Roz8IzG4UhMRx9X7xwCU1a3uG0/ wstnsKUrtxI4DGuf/nlHqmNnSQ65hCgzRb0F+/uh+Xx0DdX9oKtWU2fZNnvlc2SO 5Clo6OgXQYmkZZT39Poq =HLmd
Re: [OT] Out of memory exception - top posting
On 1/23/2014 3:51 PM, Christopher Schultz wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 André, On 1/23/14, 6:09 PM, André Warnier wrote: Christopher, Christopher Schultz wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA256 André, On 1/23/14, 2:08 PM, André Warnier wrote: Ray Holme wrote: Doing anything as root conceals the errors. Tomcat is no exception and changing it to a real user makes your testing complete. Guys, I think that the rule (or should I say suggestion ?) on this list to *not* top-post is not working. Either people don't read the rules, or they do not understand the rule, or they just ignore it. Anyway, it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. So I have a few suggestions of my own : - have the list software add a message in *bold* to all messages, indicating that top posts will be *ignored* ? - just ignore top-posts ? - drop the rule ? - -1 to all three. Tomcat (and the ASF as a whole) is a community, and our job as ... vocal? members of the community is to help meet the needs of that community. If top-posting irritates us, we just have to ask that people help us help themselves. But simply summarily ignoring top-posted replies is childish. If the top-posting becomes intolerable (it happens sometimes, especially when there is a complex thread going on and someone - usually the OP - continues to top-post), then feel free to stop replying. But don't crucify people for top-posting alone. Some people can't figure out how to reply properly. Just gently remind posters of the rules and get back to business. There is no need to reply to a post by simply saying Don't top-post and leaving it at that. Save your own time and the time of everyone else on the list (and the archives, where useless messages can't be removed) and just skip that step. If you want to reply meaningfully, feel free to add the don't top-post somewhere in your reply. In a general sense, I do agree with all of that. Be tolerant of what you receive, and strict in what you produce and that kind of thing. It's just that top-posting /is/ really annoying on this kind of list. And also that it takes quite a lot of energy to politely ask someone to not top-post, and give them the reason why, and point them to the list rules. Might there be some kind of macro in the Tomcat list server, which would allow us to paste such a statement into a response, with just a couple of keystrokes ? As a matter of fact, a few such macros would come in handy. On a historical and statistical base : [TOP] Please don't top-post, because.. [VER] Please provide Tomcat version, Java version, platform OS version [OLD] That version of Tomcat is %d years old. You should upgrade to the latest version, which has many more features and fixes for the latest security issues. [CONF] Can you post the relevant bits of your configuration here (server.xml) ? Please paste it in-line, don't send it as attachment, the list strips them. And remove comments and any sensitive information (passwords etc.) [RTFM] Please check the on-line documentation at http://tomcat.apache.org [SMART] http://www.catb.org/~esr/faqs/smart-questions.html [PAW] Patches are always welcome [HTTPD] This is the Apache Tomcat list, your question relates to Apache httpd, see http://httpd.apache.org [SPEC] Please check the Java Servlet Specification at .. [LAZY] http://lmgtfy.com/ [COMP101] Is this a school exercise ? [BUG] It's not a bug, it's a feature [FEAT] Could you create a Bugzilla entry ? [ASAP] Tomcat is open source and free. This list is manned by volunteers. If you would prefer instant gratification, please consult the list of commercial Tomcat consultants at.. [CAPS] (alias of [ASAP]) [$] (alias of [ASAP]) [CON] It's Context, with a capital C [CON2] Don't do that (put your Context in server.xml). [2C] Just my 2 cent [ROOT] It's ROOT.war -- capitalization matters, even when using a case-insensitive filesystem. - -chris Looks like the Quicktext addon for Thunderbird is perfect for this. I'll play around with adding keyboard shortcuts later. - and now we're out in a swamp, in the middle of the forest, beyond the hills off-topic. /mde/ - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: [OT] Out of memory exception - top posting
On Thu, Jan 23, 2014 at 2:08 PM, André Warnier a...@ice-sa.com wrote: Either people don't read the rules, or they do not understand the rule, or they just ignore it. I agree. As a tomcat/tomee user, I joined the list, primarily, to listen in on topics (that interest me), so I learned, very quickly, that top-posting is not preferred, here. Anyway, it seems that we're spending more time lately asking people to not top-post, than actually providing answers to their questions. Actually, it seems as though (tomcat lead) Mark Thomas (and others) have been quite tolerable of recent top-posting, and still offer advice and responses (sometimes) without the inevitable, 'don't top post' phrase/response. +1 for those always and/or unconditionally providing support to tomcat users. Also, gmail makes it easy for me to honor the rule against top-posting.
Re: Out of Memory exception (hotspot compilation)
On Thu, Jun 3, 2010 at 1:54 AM, Leon Kolchinsky lkolc...@gmail.com wrote: Yep :) You're right Charles. Thanks, Leon From Leon To Leon, an advice from personal experience and the golden rule of the tomcat user list, write it down in glowing red letters on the wall you are looking at most: Charles is ALWAYS right. ;-) regards Leon - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of Memory exception (hotspot compilation)
Hello, Just wanted to update on this issue. Atlassian support confirms that this is a known issue with Java 6.0_18 and up. So, the best solution for now is to use 6.0_17 Here - http://jira.atlassian.com/browse/CONF-19049http://jira.atlassian.com/browse/CONF-19049?focusedCommentId=197013#action_197013 Regards, Leon Kolchinsky On Thu, Jun 3, 2010 at 16:14, Leon Rosenberg rosenberg.l...@gmail.comwrote: On Thu, Jun 3, 2010 at 1:54 AM, Leon Kolchinsky lkolc...@gmail.com wrote: Yep :) You're right Charles. Thanks, Leon From Leon To Leon, an advice from personal experience and the golden rule of the tomcat user list, write it down in glowing red letters on the wall you are looking at most: Charles is ALWAYS right. ;-) regards Leon - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
RE: Out of Memory exception (hotspot compilation)
From: Leon Kolchinsky [mailto:lkolc...@gmail.com] Subject: Re: Out of Memory exception (hotspot compilation) I'd like to file a bug report on similar issue I had. Can you please tell me where can I do it? Let's see what your original post had in it... Yesterday I've got this error in catalina.out and Tomcat died (I'm attaching hs_err_pid5460.log file): # # A fatal error has been detected by the Java Runtime Environment: # # java.lang.OutOfMemoryError: requested 2147483664 bytes for Chunk::new. Out of swap space? # # Internal Error (allocation.cpp:215), pid=5460, tid=1085901120 # Error: Chunk::new # # JRE version: 6.0_18-b07 # Java VM: Java HotSpot(TM) 64-Bit Server VM (16.0-b13 mixed mode linux-amd64 ) # An error report file with more information is saved as: # /tmp/hs_err_pid5460.log # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp Does that give you a hint? - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of Memory exception (hotspot compilation)
Yep :) You're right Charles. Thanks, Leon On Wed, Jun 2, 2010 at 16:27, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Leon Kolchinsky [mailto:lkolc...@gmail.com] Subject: Re: Out of Memory exception (hotspot compilation) I'd like to file a bug report on similar issue I had. Can you please tell me where can I do it? Let's see what your original post had in it... Yesterday I've got this error in catalina.out and Tomcat died (I'm attaching hs_err_pid5460.log file): # # A fatal error has been detected by the Java Runtime Environment: # # java.lang.OutOfMemoryError: requested 2147483664 bytes for Chunk::new. Out of swap space? # # Internal Error (allocation.cpp:215), pid=5460, tid=1085901120 # Error: Chunk::new # # JRE version: 6.0_18-b07 # Java VM: Java HotSpot(TM) 64-Bit Server VM (16.0-b13 mixed mode linux-amd64 ) # An error report file with more information is saved as: # /tmp/hs_err_pid5460.log # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp Does that give you a hint? - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Out of Memory exception (hotspot compilation)
Hi, I noticed in recent emails that Leon Kolchinsky was running Tomcat and Java requested 2GB of memory unexpectedly then died due to an out of memory exception. Bizarrely, the same thing happened to me today with very similar symptoms. Specifically, the JVM requested 8GB of memory while hotspot was trying to compile the exact same Velocity/Foreach method as Leon's example. I'm running 64 bit JDK 1.6.0_18-b07 / Tomcat 6.0.24 / APR 1.1.19. I wanted to highlight this, (someone was talking about posting a bug report). Since it's the exact same method, I'm guessing the Velocity method triggers a bug in the hotspot compilation. Note that we've been running this configuration for 5 months and I haven't seen this previously, so it's probably rare. Excerpt from hs_err -- java.lang.OutOfMemoryError: requested 8589934608 bytes for Chunk::new. Out of swap space? Current thread (0x5449c800): JavaThread CompilerThread0 daemon [_thread_in_native, id=25458, stack(0x 40638000,0x40739000)] Current CompileTask: C2:2532 ! org.apache.velocity.runtime.directive.Foreach.render(Lorg/apache/velocity/context/InternalContextAdapter;Ljava/io/Writer;Lorg/apache/velocity/runtime/p arser/node/Node;)Z (529 bytes) --- [r...@main ~]# uname -a Linux main 2.6.18-164.9.1.el5 #1 SMP Wed Dec 9 03:27:37 EST 2009 x86_64 x86_64 x86_64 GNU/Linux -- CATALINA_OPTS=-Djava.awt.headless=true $CATALINA_OPTS CATALINA_OPTS=-Xmx6G $CATALINA_OPTS CATALINA_OPTS=-Xms500M $CATALINA_OPTS CATALINA_OPTS=-server $CATALINA_OPTS CATALINA_OPTS=-XX:PermSize=50M -XX:MaxPermSize=100M $CATALINA_OPTS CATALINA_OPTS=-XX:+UseParallelOldGC $CATALINA_OPTS CATALINA_OPTS=-XX:ThreadStackSize=512 $CATALINA_OPTS WILL
RE: Out of Memory exception (hotspot compilation)
From: Will Glass-Husain [mailto:wglasshus...@gmail.com] Subject: Out of Memory exception (hotspot compilation) Specifically, the JVM requested 8GB of memory while hotspot was trying to compile the exact same Velocity/Foreach method as Leon's example. I'm running 64 bit JDK 1.6.0_18-b07 Since it's the exact same method, I'm guessing the Velocity method triggers a bug in the hotspot compilation. Note that we've been running this configuration for 5 months Using the same JDK for those 5 months, or did you recently upgrade? - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of Memory exception (hotspot compilation)
The JDK has been the same since early February. I don't think there's been any other system upgrades. (it's possible there was a upgrade to the OS I'm not aware of, but definitely not the JDK). WILL On Tue, Jun 1, 2010 at 12:45 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Will Glass-Husain [mailto:wglasshus...@gmail.com] Subject: Out of Memory exception (hotspot compilation) Specifically, the JVM requested 8GB of memory while hotspot was trying to compile the exact same Velocity/Foreach method as Leon's example. I'm running 64 bit JDK 1.6.0_18-b07 Since it's the exact same method, I'm guessing the Velocity method triggers a bug in the hotspot compilation. Note that we've been running this configuration for 5 months Using the same JDK for those 5 months, or did you recently upgrade? - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Out of Memory exception (hotspot compilation)
Hmm, I'd like to file a bug report on similar issue I had. Can you please tell me where can I do it? Cheers, Leon On Wed, Jun 2, 2010 at 06:46, Will Glass-Husain wglasshus...@gmail.comwrote: The JDK has been the same since early February. I don't think there's been any other system upgrades. (it's possible there was a upgrade to the OS I'm not aware of, but definitely not the JDK). WILL On Tue, Jun 1, 2010 at 12:45 PM, Caldarale, Charles R chuck.caldar...@unisys.com wrote: From: Will Glass-Husain [mailto:wglasshus...@gmail.com] Subject: Out of Memory exception (hotspot compilation) Specifically, the JVM requested 8GB of memory while hotspot was trying to compile the exact same Velocity/Foreach method as Leon's example. I'm running 64 bit JDK 1.6.0_18-b07 Since it's the exact same method, I'm guessing the Velocity method triggers a bug in the hotspot compilation. Note that we've been running this configuration for 5 months Using the same JDK for those 5 months, or did you recently upgrade? - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
PermGen Out of memory exception
Hi All
I have developed 4 war files using Appfuse frame work.These war files
are independent.when I deployed any three war files the applications
are up and run.But when I deployed the 4th one (any) it throws a
PermGen exception.It has been copied in the bellow
1.Is this some thing related not setting the JAVA_OPTS ? or some security issue?
Can any body please Help me to revolve this problem.
Thanks
Kanchana
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([EMAIL PROTECTED])\par
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RemoveAbandoned: true\par
RemoveAbandonedTimeout: 60\par
AbandonedObjectPool is used
([EMAIL PROTECTED]
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LogAbandoned: false\par
RemoveAbandoned: true\par
RemoveAbandonedTimeout: 60\par
AbandonedObjectPool is used
([EMAIL PROTECTED])\par
\par
LogAbandoned: false\par
RemoveAbandoned: true\par
RemoveAbandonedTimeout: 60\par
Nov 12, 2007 11:42:36 AM org.apache.catalina.core.StandardContext
resourcesStart\par
\par
SEVERE: Error starting static Resources\par
java.lang.IllegalArgumentException: Document base
C:\\Tomcat-5.5.20\\webapps\\spike\par
flow does not exist or is not a readable directory\par
at
org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.\par
java:140)\par
at
org.apache.catalina.core.StandardContext.resourcesStart(StandardConte\par
xt.java:3848)\par
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4\par
019)\par
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)\par
\par
at
org.apache.catalina.core.StandardHost.start(StandardHost.java:718)\par
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)\par
\par
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442\par
)\par
at
org.apache.catalina.core.StandardService.start(StandardService.java:4\par
50)\par
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:709\par
)\par
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)\par
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\par
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.\par
java:39)\par
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces\par
sorImpl.java:25)\par
at java.lang.reflect.Method.invoke(Method.java:585)\par
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294)\par
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)\par
Nov 12, 2007 11:42:37 AM org.apache.catalina.core.StandardContext start\par
SEVERE: Error in resourceStart()\par
Nov 12, 2007 11:42:37 AM org.apache.catalina.core.StandardContext start\par
SEVERE: Error getConfigured\par
Nov 12, 2007 11:42:37 AM org.apache.catalina.core.StandardContext start\par
SEVERE: Context [/spikeflow] startup failed due to previous errors\par
Nov 12, 2007 11:42:37 AM org.apache.catalina.core.StandardContext stop\par
INFO: Container
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/\par
spikeflow] has not been started\par
AbandonedObjectPool is used
([EMAIL PROTECTED])\par
\par
LogAbandoned: false\par
RemoveAbandoned: true\par
RemoveAbandonedTimeout: 60\par
Nov 12, 2007 11:43:26 AM org.apache.coyote.http11.Http11BaseProtocol start\par
INFO: Starting Coyote HTTP/1.1 on http-8282\par
Nov 12, 2007 11:43:27 AM org.apache.jk.common.ChannelSocket init\par
INFO: JK: ajp13 listening on /0.0.0.0:8009\par
Nov 12, 2007 11:43:27 AM org.apache.jk.server.JkMain start\par
INFO: Jk running ID=0 time=0/62 config=null\par
Nov 12, 2007 11:43:27 AM org.apache.catalina.storeconfig.StoreLoader load\par
INFO: Find registry server-registry.xml at classpath resource\par
Nov 12, 2007 11:43:27 AM org.apache.catalina.startup.Catalina start\par
INFO: Server startup in 176718 ms\par
[TiphAdmin] ERROR [http-8282-Processor25]
ClickstreamListener.sessionDestroyed(6\par
0) |\par
java.lang.NullPointerException\par
at
com.opensymphony.clickstream.ClickstreamListener.sessionDestroyed(Cli\par
ckstreamListener.java:55)\par
at
org.apache.catalina.session.StandardSession.expire(StandardSession.ja\par
va:687)\par
at
org.apache.catalina.session.StandardSession.isValid(StandardSession.j\par
ava:579)\par
at
org.apache.catalina.connector.Request.doGetSession(Request.java:2200)\par
\par
at
org.apache.catalina.connector.Request.getSession(Request.java:2024)\par
at
org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.\par
java:831)\par
at
org.springframework.web.context.request.ServletRequestAttributes.ini\par
t(ServletRequestAttributes.java:81)\par
at
org.springframework.web.context.request.RequestContextListener.reques\par
Re: PermGen Out of memory exception
Hi Kanchana,
Java processes use two types of memory: the heap (which is garbage
collected), and PermGen memory (which is not garbage collected).
Generally speaking, you won't run out of heap memory unless your
application is set up so that the memory for all the objects being used
at a single moment (and thus, which can't be garbage collected) is
greater than the heap space. In this case, you would only increase the
amount of heap memory associated with a process to lower the frequency
at which the application needs to run the garbage-collection process
(the tradeoff: when the garbage collector /does/ run, it'll take
longer). You can change the maximum heap-size for a process by adding
the -Xmx #m flag to your java command. e.g. java MyApplication
-Xmx128m
PermGen space, on the other hand, doesn't get garbage collected, so you
need to ensure you're allocating enough to handle all that your
application will need. Unfortunately with the web application
classloader-system, every time you deploy an application without
restarting the application server, more PermGen space is eaten up, and
this is never recovered (not even if you undeploy an application). By
default (at least, if you're using Sun Java), a Java process is given
32Mb of PermGen memory. If you have the -server flag set for your
Java process, the default is 64Mb. I found that my mid-sized
Hibernate/Spring/Tapestry application would eat up ~8Mb of PermGen
memory every deploy; so increasing this memory to 128M+ will directly
influence the number of deploys you can do before you'll have problems.
To set the upper-bound of PermGen space, then, use the flag:
-XX:MaxPermSize=#m. By the way, to add these flags, if you're using
startup.bat on Windows you can add 'SET JAVA_OPTS=%JAVA_OPTS% -server
-...' lines to the top of it to append flags to your JAVA_OPTS variable
before the server is started using those flags. If you're on *nix, you
can add 'export JAVA_OPTS=$JAVA_OPTS -server -' lines to your
startup.sh.
Note that you can simply restart your application server to clear out
all PermGen memory that was used with applications that you've
undeployed. So, I'd use a memory profiler (I used YourKit) to see how
much PermGen space is used by your application each deploy, and set your
PermGen space high enough to cover all of your different apps
side-by-side, plus some extra memory to handle the number of hot-deploys
you expect yourself having to make at some point -- and then just
remember to restart the server when you can after a hot-deploy or two.
Jim
Kanchana Welagedara wrote:
Hi All
I have developed 4 war files using Appfuse frame work.These war files
are independent.when I deployed any three war files the applications
are up and run.But when I deployed the 4th one (any) it throws a
PermGen exception.It has been copied in the bellow
1.Is this some thing related not setting the JAVA_OPTS ? or some security issue?
Can any body please Help me to revolve this problem.
Thanks
Kanchana
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AbandonedObjectPool is used
([EMAIL PROTECTED])\par
\par
LogAbandoned: false\par
RemoveAbandoned: true\par
RemoveAbandonedTimeout: 60\par
AbandonedObjectPool is used
([EMAIL PROTECTED]
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LogAbandoned: false\par
RemoveAbandoned: true\par
RemoveAbandonedTimeout: 60\par
AbandonedObjectPool is used
([EMAIL PROTECTED])\par
\par
LogAbandoned: false\par
RemoveAbandoned: true\par
RemoveAbandonedTimeout: 60\par
Nov 12, 2007 11:42:36 AM org.apache.catalina.core.StandardContext
resourcesStart\par
\par
SEVERE: Error starting static Resources\par
java.lang.IllegalArgumentException: Document base
C:\\Tomcat-5.5.20\\webapps\\spike\par
flow does not exist or is not a readable directory\par
at
org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.\par
java:140)\par
at
org.apache.catalina.core.StandardContext.resourcesStart(StandardConte\par
xt.java:3848)\par
at
org.apache.catalina.core.StandardContext.start(StandardContext.java:4\par
019)\par
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)\par
\par
at
org.apache.catalina.core.StandardHost.start(StandardHost.java:718)\par
at
org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)\par
\par
at
org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442\par
)\par
at
org.apache.catalina.core.StandardService.start(StandardService.java:4\par
50)\par
at
org.apache.catalina.core.StandardServer.start(StandardServer.java:709\par
)\par
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)\par
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\par
at
RE: PermGen Out of memory exception
From: Jim [mailto:[EMAIL PROTECTED] PermGen space, on the other hand, doesn't get garbage collected, so you need to ensure you're allocating enough to handle all that your application will need. Unfortunately with the web application classloader-system, every time you deploy an application without restarting the application server, more PermGen space is eaten up, and this is never recovered (not even if you undeploy an application). Not entirely true. Modern Java virtual machines perform garbage collection on PermGen, but it's remarkably easy to leave a reference lying around that will hold a class in memory - which holds the class' ClassLoader in memory, which holds all the other classes loaded by that ClassLoader in memory. Unless you have unusually good hygiene rules as you develop, this makes it look like PermGen never gets garbage collected! There's plenty of past discussion on the list on this topic; I've no doubt Chuck will reply, but I suggest http://tomcat.apache.org/faq/memory.html as a good place to start reading. It may not be your webapp's code that's at fault, by the way. There are plenty of third party libraries that don't clean up after themselves properly (including some I've written, I'm ashamed to admit). - Peter - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: PermGen Out of memory exception
Caldarale, Charles R wrote: From: Jim [mailto:[EMAIL PROTECTED] Subject: Re: PermGen Out of memory exception PermGen space, on the other hand, doesn't get garbage collected As Peter C indicated, this is utter BS. Why do people keep propagating this fallacy? Easier to blame the JVM than take responsibility for bugs in your own code? Cool, thanks a lot for the clarification, and sorry about that. So there's nothing in the JVM or Tomcat (possible unknown/unfixed bugs notwithstanding) that precludes PermGen space from being recovered via garbage collection when undeploying an application? It's necessarily a leak in the application or one of the libraries/frameworks it uses? To address your rhetorical question :) , this issue is a mess to research. This industry being what it is, it can be intimidating to be pointed at a 21 page Sun white paper when users are screaming because the application is down; it certainly makes it hard for me to defend the learning curve of using Java-based open source approaches when that's the suggested avenue. People are obviously going to look for the quick answers first: Tomcat's FAQ (http://tomcat.apache.org/faq/memory.html) suggests too many servlets/JSPs for the PermGen issue. I use frameworks rather than servlets/JSPs directly, but when I go to the forums/bugs for those frameworks, they're usually blaming each other, or Tomcat, or the JVM. Turning, then, to a couple examples from Google: - Google tomcat permgen and get http://www.jroller.com/agileanswers/entry/preventing_java_s_java_lang, which suggests upgrading Tomcat, or switching to JRockit, or upgrading the JVM. - Google permgen error, and get http://my.opera.com/karmazilla/blog/2007/03/15/permgen-strikes-back, which says: And finally, the permanent generation. This is for objects that the virtual machine has decided to endorse with eternal life - which is precicely the core of the problem. Objects in the permanent generation are never garbage collected; that is, under /normal/ circumstances when the jvm is started with /normal/ command line parameters. It's hard not to take that last snippet at face value, for example, when a blank application with a framework stack leaks on reload, and all said frameworks claim to be leak-free. It's also called /Perm/Gen. The fallacy's just not obvious, and there's no simple authority on this common issue. Perhaps the Tomcat FAQ on memory-issues could be fleshed out/updated? With so many blogs, forum posts, and bug-report-discussion-threads suggesting that it's normal to expect an unbounded PermGen increase when reloading/redeploying applications, an explicit contrary statement in the FAQ would be helpful, if even to clarify for users that yes, they /should/ bother doing their own memory-profiling on this issue, because there /is/ a problem with some code they're using, whether it's theirs or another party's. The PermGen discussion in the FAQ should be expanded to include the now-common case of PermGen running out not because of servlets/JSPs but because of Hibernate's heavy PermGen usage, or because some other third party is precluding classloader garbage collection on reload/redeploy (which would be a great place for the link to Spring's compilation of leak issues with third-party libraries). Jim - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: PermGen Out of memory exception
From: Jim [mailto:[EMAIL PROTECTED] Subject: Re: PermGen Out of memory exception To address your rhetorical question :) , this issue is a mess to research. Which is why it should be done before deployment... it can be intimidating to be pointed at a 21 page Sun white paper Try this one first: http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html Unfortunately, it does not address class-heavy situations, such as app servers. http://www.jroller.com/agileanswers/entry/preventing_java_s_java_lang, which suggests upgrading Tomcat, or switching to JRockit, or upgrading the JVM. Switching to JRockit only masks the problem temporarily, since it doesn't have a separate space for instances of java.lang.Class; do enough app reloads with JRockit, and you will run into the problem. We've also found other significant issues with JRockit, so I can't recommend it. http://my.opera.com/karmazilla/blog/2007/03/15/permgen-strikes-back This one article is the source of much misinformation. It's unfortunate that the author has decided his conclusions are the only possible ones that explain the symptoms, regardless of reality. The fallacy's just not obvious, and there's no simple authority on this common issue. Well, actually there is - look at the HotSpot JVM code, which is freely available. Of course, there are side effects (My brain hurts! It will have to come out. :-). Perhaps the Tomcat FAQ on memory-issues could be fleshed out/updated? This specific item is already in the Tomcat FAQ: If you have a lot of servlets or JSP's, you may need to increase your permanent generation. By default, it is 64MB. Doubling [sic] it to be -XX:MaxPermSize=256m might be a good start. an explicit contrary statement in the FAQ would be helpful This article linked to from Your classloaders are not being garbage collected seems to cover pretty much everything you've asked for. For reference, it points to the following location: http://opensource2.atlassian.com/confluence/spring/pages/viewpage.action ?pageId=2669 - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: PermGen Out of memory exception
Caldarale, Charles R wrote: Perhaps the Tomcat FAQ on memory-issues could be fleshed out/updated? This specific item is already in the Tomcat FAQ: If you have a lot of servlets or JSP's, you may need to increase your permanent generation. By default, it is 64MB. Doubling [sic] it to be -XX:MaxPermSize=256m might be a good start. The problem with that language is it implies that PermGen space is generally only an issue if you're using a lot of servlets or JSPs. But these days, I assume more people are getting PermGen issues not with servlets/JSPs but with framework stacks -- e.g. Hibernate makes hungry use of PermGen. Further, this entry implies that an application will take a static amount of PermGen, so doubling it will solve the problem, but I read about a lot of people having this issue on reload/redeploy -- i.e. the classloader leak, but there's nothing in the FAQ linking the PermGen error to the Your classloaders are not being garbage collected link. I agree with you that that article has pretty much everything, but it's put at the end of the list almost as an afterthought, and I'd also suggest that if someone had already concluded that their classloaders were not being garbage collected, they'd have already found that link. We should put some marquee and blink tags around it! : ) Mostly I'm just being defensive, but I do truly appreciate the correction. Jim - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: PermGen Out of memory exception
From: Jim [mailto:[EMAIL PROTECTED] Subject: Re: PermGen Out of memory exception The problem with that language is it implies that PermGen space is generally only an issue if you're using a lot of servlets or JSPs. Agreed, that's not inclusive enough. there's nothing in the FAQ linking the PermGen error to the Your classloaders are not being garbage collected link. Yes, that should be clearer. (Poking around, I can't find any doc on how to update the FAQ - it doesn't appear to be in the source tree, but I might have missed it.) In any event, if you have suggested wording updates, please submit them via Bugzilla. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
