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From "Shapira, Yoav" <>
Subject RE: Strange OutOfMemory Error in TcpWorkerThread
Date Fri, 30 Jul 2004 13:08:10 GMT

It's not likely a memory problem, but a resources problem for creating threads.  If you're
running on unix, look at the ulimit command.

Yoav Shapira
Millennium Research Informatics

>-----Original Message-----
>From: Francois JEANMOUGIN []
>Sent: Friday, July 30, 2004 4:00 AM
>To: Tomcat Users List
>Subject: Strange OutOfMemory Error in TcpWorkerThread
>Hi all, I have this strange error :
>SEVERE: Caught exception (java.lang.OutOfMemoryError: unable to create new
>native thread) executing
>terminating thread
>I use those parameters :
>-verbose:gc -Xms756m -Xmx1024m -XX:+UseConcMarkSweepGC -XX:+UseParNewGC
>And the ParNew before and after the error gives me :
>Before : [ParNew 299307K->285970K(774080K), 0.0632930 secs]
>After :  [ParNew 302226K->290481K(774080K), 0.0777970 secs]
>So, there is a LOT of memory available. I probably have to change some Jvm
>parameters. Note that the dev is out for holidays, so it will be difficult
>for me to look for a memory leak somewhere. Note that if I give more memory
>(say -Xms=1024m -Xmx=1536m, for example), the error arrives sooner. There
>800 connectors configured. I was also unable to increase the number of
>tomcat5.CoyoteConnector threads.
>Any help appreciated,
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