Tomcat 6 going down after reaching its maximum number of threads

tomcat

Our Tomcat 6.0.29 goes down after reaching its maximum number of Threads. I would really appreciate any help with it because it is a production server.

Here is part of the catalina.log file:

INFO: Maximum number of threads (600) created for connector with address null and port 80
Mar 8, 2011 11:19:37 AM org.apache.coyote.http11.Http11Protocol pause

INFO: Pausing Coyote HTTP/1.1 on http-80
Mar 8, 2011 11:19:38 AM org.apache.catalina.core.StandardService stop

INFO: Stopping service Catalina
Mar 8, 2011 11:19:38 AM org.apache.catalina.core.StandardWrapper unload

INFO: Waiting for 8 instance(s) to be deallocated

Best Answer

There is no code in Tomcat that triggers a shutdown when the thread pool is fully utlised. You need to look for an external process that is doing this. Maybe some form of watchdog process that tries to connect to Tomcat, can't because all the threads are in use so it stops / restarts Tomcat?

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