Java out of memory error
Hi all, In my tomcat application server frequently i am getting the java out of memory error. *Error:* 20 Oct, 2010 1:09:41 PM org.apache.tomcat.util.threads.ThreadPool$ControlRunnable run SEVERE: Caught exception (java.lang.OutOfMemoryError: unable to create new native thread) executing org.apache.tomcat.util.net.leaderfollowerworkerthr...@d3e5cc, terminating thread *Server.Xml Config:* *http-443* Current thread count: 1000 Current threads busy: 923 Max threads: 5000 Max spare threads: 1175 Min spare threads: 500 Max time (ms): 156766 Processing time (ms): 63838188 Request count: 13233 Error count: 789 Received: 392Kb Sent: 81Mb Is this configuration is normal or any modification required to work the application proper?? Tomcat Version:Apache Tomcat 5.5.20 Java JRE 1.6.0 Regards rujinraj
Re: Java out of memory error
On 20/10/2010 09:15, rujin raj wrote: Hi all, In my tomcat application server frequently i am getting the java out of memory error. *Error:* 20 Oct, 2010 1:09:41 PM org.apache.tomcat.util.threads.ThreadPool$ControlRunnable run SEVERE: Caught exception (java.lang.OutOfMemoryError: unable to create new native thread) executing org.apache.tomcat.util.net.leaderfollowerworkerthr...@d3e5cc, terminating thread *Server.Xml Config:* *http-443* Current thread count: 1000 Current threads busy: 923 Max threads: 5000 Max spare threads: 1175 Min spare threads: 500 Max time (ms): 156766 Processing time (ms): 63838188 Request count: 13233 Error count: 789 Received: 392Kb Sent: 81Mb Is this configuration is normal or any modification required to work the application proper?? 5000 threads might be a little excessive, depending on what your application is doing and how much memory a thread consumes versus how much resource the physical machine has. 789 errors for only 81Mb sent seems a little high. Are you load testing or is this in production? How much memory does the machine have? How much is allocated to Tomcat? What operating system is it? p Tomcat Version:Apache Tomcat 5.5.20 Java JRE 1.6.0 Regards rujinraj 0x62590808.asc Description: application/pgp-keys signature.asc Description: OpenPGP digital signature
Re: Java out of memory error
Hi, 789 errors for only 81Mb sent seems a little high. Are you load testing or is this in production? Is there any modification required in configuration file? Thia is production machine. How can I test the load how much it will capable? How much memory does the machine have? The Physical memory of the system is 32GB. How much is allocated to Tomcat? 1GB is allocated for JAVA. Not able to allocate more memory for java What operating system is it? Windows 2008 ent Server 64 bit is installed. Tomcat and JAVA are 32 bit What is the Garbage collection in JAVA? If i Force Garbage collection using the Lambda probe tomcat monitor whether it will affect any user sessions or anything?? Rujinraj On 20 October 2010 15:44, Pid p...@pidster.com wrote: On 20/10/2010 09:15, rujin raj wrote: Hi all, In my tomcat application server frequently i am getting the java out of memory error. *Error:* 20 Oct, 2010 1:09:41 PM org.apache.tomcat.util.threads.ThreadPool$ControlRunnable run SEVERE: Caught exception (java.lang.OutOfMemoryError: unable to create new native thread) executing org.apache.tomcat.util.net.leaderfollowerworkerthr...@d3e5cc, terminating thread *Server.Xml Config:* *http-443* Current thread count: 1000 Current threads busy: 923 Max threads: 5000 Max spare threads: 1175 Min spare threads: 500 Max time (ms): 156766 Processing time (ms): 63838188 Request count: 13233 Error count: 789 Received: 392Kb Sent: 81Mb Is this configuration is normal or any modification required to work the application proper?? 5000 threads might be a little excessive, depending on what your application is doing and how much memory a thread consumes versus how much resource the physical machine has. 789 errors for only 81Mb sent seems a little high. Are you load testing or is this in production? How much memory does the machine have? How much is allocated to Tomcat? What operating system is it? p Tomcat Version:Apache Tomcat 5.5.20 Java JRE 1.6.0 Regards rujinraj
RE: Java out of memory error
From: rujin raj [mailto:rujin...@gmail.com] Subject: Re: Java out of memory error Windows 2008 ent Server 64 bit is installed. Tomcat and JAVA are 32 bit You're never going to be able to run that many threads in a 32-bit process. Use a 64-bit JVM, or reduce the max threads count considerably. This has nothing to do with running out of heap space - you've exceeded the process space due to the excessive number of threads. You could reduce the heap and have room for more threads, but that might cause other problems. If you really need to run that large a workload, move to a 64-bit JVM. - 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
Java out of memory error
hi all, I have Installed tomcat 5.5.20 on my windows 2008 server with 32 GB physical memory and the Java version is jre1.6.0. Five applications are installed in it.Today i got one error and applications not working.Error as follows Tomcat log: *14 Oct, 2010 4:08:05 PM org.apache.tomcat.util.threads.ThreadPool$ControlRunnable run* *SEVERE: Caught exception (java.lang.OutOfMemoryError: unable to create new native thread) executing org.apache.tomcat.util.net.leaderfollowerworkerthr...@10d564d, terminating thread* * * In javaVM I set the initial memory pool size as 1000MB, Max memory pool size as 1200MB and thread stack size as blank.More over I am not able to set the minimum pool size more than 1024 MB. How can I increase the JVM memory more than 1GB?? What might me the cause for java out of memory error? How to resolve the problem? Please help me to resolve the problem. Regards rujinraj - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Java out of memory error
On 10/14/2010 02:19 PM, rujin raj wrote: I have Installed tomcat 5.5.20 on my windows 2008 server with 32 GB physical memory and the Java version is jre1.6.0. Is the OS installation 64-bit or 32-bit? If the application is 64-bit, is the Java installation 64-bit or 32-bit? (I suppose your Java installation is 32-bit) Five applications are installed in it.Today i got one error and applications not working.Error as follows Tomcat log: *14 Oct, 2010 4:08:05 PM org.apache.tomcat.util.threads.ThreadPool$ControlRunnable run* *SEVERE: Caught exception (java.lang.OutOfMemoryError: unable to create new native thread) executing org.apache.tomcat.util.net.leaderfollowerworkerthr...@10d564d, terminating thread* * * In javaVM I set the initial memory pool size as 1000MB, Max memory pool size as 1200MB and thread stack size as blank.More over I am not able to set the minimum pool size more than 1024 MB. How can I increase the JVM memory more than 1GB?? First, a 64-bit Java installation is needed. And this is only available, if the operating system installation is 64-bit. With these two requirements fulfilled, the JVM can be configured with larger memory allocations. What might me the cause for java out of memory error? How to resolve the problem? I'm a bit uncertain of the error message, however: it may be that it's not actually JVM memory that is exhausted, but threads. Could it be that your application is starting new threads, but not disposing of them properly? If it is a memory exhaustion situation, you should be able to find numerous discussions on how to pinpoint memory leaks in applications running under Tomcat. Some of the memory analysis techniques might help in resolving thread exhaustion issues, too (if you can locate the unexpected thread objects and find what is keeping them alive). Another way to find out about the threads is to produce a thread dump of the running JVM (that also has been often discussed on this list). - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Re: Java out of memory error
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Rujin, On 10/14/2010 7:19 AM, rujin raj wrote: I have Installed tomcat 5.5.20 on my windows 2008 server with 32 GB physical memory and the Java version is jre1.6.0. Just a note: 5.5.20 is over 4 years old. You should really upgrade to 5.5.30 or even to 6.0.29. Upgrading from 5.5 to 6.0 is pretty seamless. Are you using a 32-bit of 64-bit JVM? If you are using a 32-bit VM then you are not able to take advantage of all that sweet, sweet system memory. Today i got one error and applications not working.Error as follows Tomcat log: *14 Oct, 2010 4:08:05 PM org.apache.tomcat.util.threads.ThreadPool$ControlRunnable run* *SEVERE: Caught exception (java.lang.OutOfMemoryError: unable to create new native thread) executing org.apache.tomcat.util.net.leaderfollowerworkerthr...@10d564d, terminating thread* * * In javaVM I set the initial memory pool size as 1000MB, Max memory pool size as 1200MB and thread stack size as blank.More over I am not able to set the minimum pool size more than 1024 MB. How can I increase the JVM memory more than 1GB?? Looks like you are on a 32-bit JVM. Try upgrading to a 64-bit JVM if you want more memory, although memory probably isn't your real problem. What might me the cause for java out of memory error? How to resolve the problem? Note the entire message: java.lang.OutOfMemoryError: unable to create new native thread. It doesn't say it's out of heap space, it says that it can't create a new native thread. There are a couple of reasons this could happen: 1. The Tomcat user cannot create any more threads because of a thread limit within a single process. Windows can limit the number of threads a process can create as a security and resource management mechanism. 2. The process can't create another thread due to the available (native) memory and the stack size you have for a thread. This page has some good information about thread limits on Windows: http://blogs.technet.com/b/markrussinovich/archive/2009/07/08/3261309.aspx Can you post all of the JVM arguments you are using to start Java? Could you also post all the Connector elements from your conf/server.xml file? Finally, can you comment on the use of any threads within your own application that are /not/ managed by Tomcat? For instance, do you use TimerTask/Quartz to do background jobs, or do you launch any of your own threads? - -chris -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.10 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAky3HW8ACgkQ9CaO5/Lv0PDeegCeJ+5I8eyEErTA5JGm/GatECiz VF4An3pOLa0D9kltombztjf4rm7UxIGO =tpHH -END PGP SIGNATURE- - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
