RE: [OT] Tomcat causing high CPU load
Thanks. StringBuilder seems to be the most popular suggestion! I'm going to implement this and report on any changes I see in Tomcat's behavior. I'm also looking at other possiblities, such as Tomcat's I/O activities causing thrashing if I/O is excessive. Would anybody know how I could monitor Tomcat's I/O activities? Also, is there a way to configure Tomcat so that a connection times out after a certain period of time? Thanks to everyone for your attention and help. Bob -Original Message- From: Kev Jackson [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 07, 2007 11:14 PM To: Tomcat Users List Subject: Re: [OT] Tomcat causing high CPU load Hi, From a programmatic point of view Many thanks for all the suggestions. I found a simple tool called StackTrace from http://www.adaptj.com/root/main/tracehowtos#ht0 to help me take thread dumps from Tomcat. I found when the CPU load was high that there was a thread from the suspect web app running. In contrast, thread dumps taken when CPU load was normal showed no such threads. The line that the web app thread was running at is a simple - data += \n; - this is in a loop collecting form data from hidden vars created by JavaScript code. It's been suggested by ny colleagues that the JVM could be running out of memory since a new String object is created for each +=. The String data ends up being very long anyway. Any thoughts on this would be appreciated. Also, would anyone know how to monitor Tomcat's I/O activities? I understand that thrashing could be a drain on memory resources. Thanks again for everybody's help! You could replace the data += \n code with a StringBuilder (Java6) or a StringBuffer - this would reduce the number of intermediate objects being created quite significantly Kev - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - 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: [OT] Tomcat causing high CPU load
On 08/11/2007, at 6:29 PM, Bob Riaz wrote: Thanks. StringBuilder seems to be the most popular suggestion! I'm going to implement this and report on any changes I see in Tomcat's behavior. I'm also looking at other possiblities, such as Tomcat's I/O activities causing thrashing if I/O is excessive. Would anybody know how I could monitor Tomcat's I/O activities? Also, is there a way to configure Tomcat so that a connection times out after a certain period of time? Thanks to everyone for your attention and help. Bob Hi Bob, You should really have a look at http://tomcat.apache.org/tomcat-6.0-doc/config/http.html I will leave how to configure the timeout as an exercise for the reader. :-) Regards Andrew smime.p7s Description: S/MIME cryptographic signature
Re: [OT] Tomcat causing high CPU load
Bob Riaz wrote: Many thanks for all the suggestions. I found a simple tool called StackTrace from http://www.adaptj.com/root/main/tracehowtos#ht0 to help me take thread dumps from Tomcat. I found when the CPU load was high that there was a thread from the suspect web app running. In contrast, thread dumps taken when CPU load was normal showed no such threads. The line that the web app thread was running at is a simple - data += \n; - this is in a loop collecting form data from hidden vars created by JavaScript code. It's been suggested by ny colleagues that the JVM could be running out of memory since a new String object is created for each +=. The String data ends up being very long anyway. Any thoughts on this would be appreciated. Instead of using a string, use a StringBuffer and .append() to it, then when done building, the final string is just StringBuffer.toString(); It's much faster than appending directly to a string. Also, would anyone know how to monitor Tomcat's I/O activities? I understand that thrashing could be a drain on memory resources. Thanks again for everybody's help! bob -Original Message- From: Christopher Schultz [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 06, 2007 9:21 AM To: Tomcat Users List Subject: Re: [OT] Tomcat causing high CPU load -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Charlie, Charlie Wingate wrote: There is a kill.exe (older version in resource kits) and a newer taskkill.exe included with XP [onward] Note that taskkill.exe and UNIX kill are completely different. taskkill actually kills tasks, while the UNIX kill sends signals to processes. but neither of them will provide a stack dump/trace. That is because of the lack of signaling ability of taskkill.exe. Although they are very useful as tools and parts. Definitely. I had no idea this program existed. My experience with MS Windows is that programs kill themselves frequently enough that I probably will continue to never need this tool ;) - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHMIZp9CaO5/Lv0PARApJmAJ4p55P3qwyLtMmLDVlc6jyPayhQ2wCgh//n zSjOq8EFoYEqbQz9ZLqq0bE= =poDw -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - 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: [OT] Tomcat causing high CPU load
From: David kerber [mailto:[EMAIL PROTECTED] Subject: Re: [OT] Tomcat causing high CPU load Instead of using a string, use a StringBuffer and .append() to it Or, if you're on Java 1.5 or 1.6, use a StringBuilder object; it's the same as StringBuffer but without the synchronization overhead. - 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: [OT] Tomcat causing high CPU load
the application qhere i work, also have a big charge for the memory, the server have this parametres, and never this crased, i think that this force to free memory, the memory no colapse, but some errors to extrange, i think that free memory that is in use, and this cause problems, kill a sesion, or remove a backing bean of sesion, i don.t know, this is the parametrer JAVA_OPTS=$JAVA_OPTS -Xms1500M -Xmx2000m -XX:MaxPermSize=1500m -XX:+UseParallel GC -XX:+AggressiveHeap -XX:+DisableExplicitGC -XX:NewRatio=2 -server On Nov 6, 2007 10:21 AM, Christopher Schultz [EMAIL PROTECTED] wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Charlie, Charlie Wingate wrote: There is a kill.exe (older version in resource kits) and a newer taskkill.exe included with XP [onward] Note that taskkill.exe and UNIX kill are completely different. taskkill actually kills tasks, while the UNIX kill sends signals to processes. but neither of them will provide a stack dump/trace. That is because of the lack of signaling ability of taskkill.exe. Although they are very useful as tools and parts. Definitely. I had no idea this program existed. My experience with MS Windows is that programs kill themselves frequently enough that I probably will continue to never need this tool ;) - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHMIZp9CaO5/Lv0PARApJmAJ4p55P3qwyLtMmLDVlc6jyPayhQ2wCgh//n zSjOq8EFoYEqbQz9ZLqq0bE= =poDw -END PGP SIGNATURE- - 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: [OT] Tomcat causing high CPU load
Many thanks for all the suggestions. I found a simple tool called StackTrace from http://www.adaptj.com/root/main/tracehowtos#ht0 to help me take thread dumps from Tomcat. I found when the CPU load was high that there was a thread from the suspect web app running. In contrast, thread dumps taken when CPU load was normal showed no such threads. The line that the web app thread was running at is a simple - data += \n; - this is in a loop collecting form data from hidden vars created by JavaScript code. It's been suggested by ny colleagues that the JVM could be running out of memory since a new String object is created for each +=. The String data ends up being very long anyway. Any thoughts on this would be appreciated. Also, would anyone know how to monitor Tomcat's I/O activities? I understand that thrashing could be a drain on memory resources. Thanks again for everybody's help! bob -Original Message- From: Christopher Schultz [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 06, 2007 9:21 AM To: Tomcat Users List Subject: Re: [OT] Tomcat causing high CPU load -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Charlie, Charlie Wingate wrote: There is a kill.exe (older version in resource kits) and a newer taskkill.exe included with XP [onward] Note that taskkill.exe and UNIX kill are completely different. taskkill actually kills tasks, while the UNIX kill sends signals to processes. but neither of them will provide a stack dump/trace. That is because of the lack of signaling ability of taskkill.exe. Although they are very useful as tools and parts. Definitely. I had no idea this program existed. My experience with MS Windows is that programs kill themselves frequently enough that I probably will continue to never need this tool ;) - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHMIZp9CaO5/Lv0PARApJmAJ4p55P3qwyLtMmLDVlc6jyPayhQ2wCgh//n zSjOq8EFoYEqbQz9ZLqq0bE= =poDw -END PGP SIGNATURE- - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - 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: [OT] Tomcat causing high CPU load
Hi, From a programmatic point of view Many thanks for all the suggestions. I found a simple tool called StackTrace from http://www.adaptj.com/root/main/tracehowtos#ht0 to help me take thread dumps from Tomcat. I found when the CPU load was high that there was a thread from the suspect web app running. In contrast, thread dumps taken when CPU load was normal showed no such threads. The line that the web app thread was running at is a simple - data += \n; - this is in a loop collecting form data from hidden vars created by JavaScript code. It's been suggested by ny colleagues that the JVM could be running out of memory since a new String object is created for each +=. The String data ends up being very long anyway. Any thoughts on this would be appreciated. Also, would anyone know how to monitor Tomcat's I/O activities? I understand that thrashing could be a drain on memory resources. Thanks again for everybody's help! You could replace the data += \n code with a StringBuilder (Java6) or a StringBuffer - this would reduce the number of intermediate objects being created quite significantly Kev - 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: Tomcat causing high CPU load
On 11/6/07, Peng Tuck Kwok [EMAIL PROTECTED] wrote: Is there a link for Moskito? http://moskito.anotheria.net http://moskito.dev.java.net the site is on the move (moving to something better desgined) so just ask :-) Leon On Nov 6, 2007 6:21 AM, Leon Rosenberg [EMAIL PROTECTED] wrote: Moskito can display monitoring traces instantly (path through monitoring points) and measure time in each call and sub-calls, but it requires some source code adoption. regards Leon On 11/5/07, Caldarale, Charles R [EMAIL PROTECTED] wrote: From: Caldarale, Charles R Subject: RE: Tomcat causing high CPU load There are also some 3rd-party tools to take thread dumps of services (I think JProbe does, for example). Also, Lambda Probe (www.lambdaprobe.org) can display stack traces, but only one thread at a time. - 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] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - 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: Tomcat causing high CPU load
Hi Bob, Kill -3 TOMCAT PID Will produce a stack trace in catalina.out This problem is VERY most probably your code, and not tomcat, but a stacktrace should show this. ps auxwh will also give you an indication, its probably just 1 thread pushing you to such a high load. As for walking through the code - don't forget this stuff is multithreaded so its not so easy to walk through... My bets are on an unsynchronized HashMap. Cheers Andrew On 05/11/2007, at 10:44 PM, Sai Bobba wrote: Many thanks. We've had several developers walk through the code to try to catch the possibity that the app may be sitting in a loop in some situations. The code seems ok, and, as I indicated, we've never been able to reproduce the situation. I've searched the web for taking thread dumps, as I don't know how to do that, butg haven't been able to find anything. Perhaps you could give me a pointer if you have the time. Thanks again for your attention. Bob - 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: Tomcat causing high CPU load
There is a kill.exe (older version in resource kits) and a newer taskkill.exe included with XP on; but neither of them will provide a stack dump/trace. Although they are very useful as tools and parts. :) ~Charlie The significant problems we have cannot be solved at the same level of thinking with which we created them. - Albert Einstein -Original Message- From: Caldarale, Charles R [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 06, 2007 9:28 AM To: Tomcat Users List Subject: RE: Tomcat causing high CPU load From: Andrew Miehs [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat causing high CPU load Kill -3 TOMCAT PID ps auxwh The OP is running on Windows... - 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] This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals computer viruses. --- This message is a CONFIDENTIAL communication. If you are not the intended recipient, please do not read, copy, or use it, and do not disclose it to others. Please notify the sender of the delivery error by replying to this message, and then delete it from your system. Thank you. This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals computer viruses. - 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: Tomcat causing high CPU load
From: Andrew Miehs [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat causing high CPU load Kill -3 TOMCAT PID ps auxwh The OP is running on Windows... - 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: [OT] Tomcat causing high CPU load
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Charlie, Charlie Wingate wrote: There is a kill.exe (older version in resource kits) and a newer taskkill.exe included with XP [onward] Note that taskkill.exe and UNIX kill are completely different. taskkill actually kills tasks, while the UNIX kill sends signals to processes. but neither of them will provide a stack dump/trace. That is because of the lack of signaling ability of taskkill.exe. Although they are very useful as tools and parts. Definitely. I had no idea this program existed. My experience with MS Windows is that programs kill themselves frequently enough that I probably will continue to never need this tool ;) - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.7 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHMIZp9CaO5/Lv0PARApJmAJ4p55P3qwyLtMmLDVlc6jyPayhQ2wCgh//n zSjOq8EFoYEqbQz9ZLqq0bE= =poDw -END PGP SIGNATURE- - 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: Tomcat causing high CPU load
Many thanks. We've had several developers walk through the code to try to catch the possibity that the app may be sitting in a loop in some situations. The code seems ok, and, as I indicated, we've never been able to reproduce the situation. I've searched the web for taking thread dumps, as I don't know how to do that, butg haven't been able to find anything. Perhaps you could give me a pointer if you have the time. Thanks again for your attention. Bob On 11/4/07, Caldarale, Charles R [EMAIL PROTECTED] wrote: From: Sai Bobba [mailto:[EMAIL PROTECTED] Subject: Tomcat causing high CPU load - Tomcat was responsible for this CPU load almost exclusively You need to differentiate between Tomcat and the webapps running within, even though they are all running in the same process. It is highly likely that it's your webapp stuck in a loop, not Tomcat itself. As a first step, take several thread dumps when this high CPU usage is observed, and see where the threads are spending their time. - 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: Tomcat causing high CPU load
From: Sai Bobba [mailto:[EMAIL PROTECTED] Subject: Re: Tomcat causing high CPU load I've searched the web for taking thread dumps Try searching the Tomcat mailing list archives (http://marc.info/?l=tomcat-user) as well. For Windows, run the process from a command prompt, and enter a CTRL-break when you see the problem. If you're running it as a service, get the PID number from Task Manager and use it with the jstack.exe program. (Not sure if jstack is available with JDK 1.5, but it is included in JDK 6.) There are also some 3rd-party tools to take thread dumps of services (I think JProbe does, for example). - 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: Tomcat causing high CPU load
From: Caldarale, Charles R Subject: RE: Tomcat causing high CPU load There are also some 3rd-party tools to take thread dumps of services (I think JProbe does, for example). Also, Lambda Probe (www.lambdaprobe.org) can display stack traces, but only one thread at a time. - 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: Tomcat causing high CPU load
Moskito can display monitoring traces instantly (path through monitoring points) and measure time in each call and sub-calls, but it requires some source code adoption. regards Leon On 11/5/07, Caldarale, Charles R [EMAIL PROTECTED] wrote: From: Caldarale, Charles R Subject: RE: Tomcat causing high CPU load There are also some 3rd-party tools to take thread dumps of services (I think JProbe does, for example). Also, Lambda Probe (www.lambdaprobe.org) can display stack traces, but only one thread at a time. - 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] - 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: Tomcat causing high CPU load
Is there a link for Moskito? On Nov 6, 2007 6:21 AM, Leon Rosenberg [EMAIL PROTECTED] wrote: Moskito can display monitoring traces instantly (path through monitoring points) and measure time in each call and sub-calls, but it requires some source code adoption. regards Leon On 11/5/07, Caldarale, Charles R [EMAIL PROTECTED] wrote: From: Caldarale, Charles R Subject: RE: Tomcat causing high CPU load There are also some 3rd-party tools to take thread dumps of services (I think JProbe does, for example). Also, Lambda Probe (www.lambdaprobe.org) can display stack traces, but only one thread at a time. - 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] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Tomcat causing high CPU load
Hi, I'm using the following: JDK1.5 Tomcat 6 SQL Server 2000 Server running on Windows 2000 The web app deployed consists of: an application form filled in by the prospective student, a servlet that gets the form parameters (60), processes them, and saves the data input by the user to several tables in the database. Processing of the form data involves applying testing the data against admission criteria. When the web ap was first deployed some months ago, we had the problem that some of the input by the users was too large for the space allocated in the corresponding column in the db table - this caused SQLExceptions to be thrown each time this happened. At the same time we noticed that many times a day the CPU load on the server machine was up at 60% - 90+% - Tomcat was responsible for this CPU load almost exclusively - the other processes running on the machine were taking 3%. This meant having to restart Tomcat several times a day. At first we thought this was related to the db insertion problem. We fixed the db issue so that no more exceptions are thrown, but we still find the CPU load up at 60% at least once a day - Tomcat responsible again. Another thing I noticed in testing the app was that if after I submitted an application I hit the 'Back' button on the browser and then submitted again, app would hang, and the CPU load on the server machine would rise to 60%. I tried this several times, with the same result each time. However, it was possible to submit an aplication from a different browser even when the CPU load was high. Oddly, when I did this test on my local machine I didn't have this problem. I hope I've laid out the situation clearly. My searches on the web for this sort of problem have yielded no solution. If anybody has had this problem and fixed it, or has an insight into what the problem might be, I'd greatly appreciate hearing about it! Many thanks! bob
RE: Tomcat causing high CPU load
From: Sai Bobba [mailto:[EMAIL PROTECTED] Subject: Tomcat causing high CPU load - Tomcat was responsible for this CPU load almost exclusively You need to differentiate between Tomcat and the webapps running within, even though they are all running in the same process. It is highly likely that it's your webapp stuck in a loop, not Tomcat itself. As a first step, take several thread dumps when this high CPU usage is observed, and see where the threads are spending their time. - 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]
