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List:       jakarta-commons-user
Subject:    java.lang.OutOfMemoryError unable to create new native thread
From:       Steve Cohen <stevecoh1 () comcast ! net>
Date:       2009-02-03 15:30:11
Message-ID: 49886303.60401 () comcast ! net
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We have an application that runs under Tomcat under RHEL 5.0  and is 
launched by a jsvc daemon. 

It chugs along seemingly fine on several servers, yet yesterday crashed 
on one of them with the above exception seemingly without experiencing 
any kind of abnormal load.  I am trying to get a handle on this. 

System is

$ uname -a
Linux  2.6.18-92.1.22.el5 #1 SMP Fri Dec 5 09:29:46 EST 2008 i686 i686 
i386 GNU/Linux

Java version:
java -version
java version "1.5.0_16"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_16-b02)
Java HotSpot(TM) Client VM (build 1.5.0_16-b02, mixed mode, sharing)

no special JVM memory settings are used when launching tomcat, just the 
default memory allocations.  I have read in some places that this 
particular form of OutOfMemoryError is actually made worse by increasing 
the memory size.

I need to deploy some thread and memory monitoring setup to get a handle 
on this.

Can someone suggest a path forward here?

Thanks.


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