-----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
