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From Konstantin Kolinko <>
Subject Re: Tomcat 6.0.32 stops responding
Date Fri, 08 Jul 2011 21:00:39 GMT
2011/7/9 PJ Delsh <>:
> For the last several weeks Tomcat stops responding during
> the day, sometimes more than once.
> The Tomcat
> service is still running, but Tomcat is not responding to requests.
> Apache & Tomcat services have to be
> restarted for the app to start working again.
> My guys can’t find anything in the logs that point to the
> issue.  We desperately need help.

See previous such questions in the archives.

You have to take three thread dumps with small interval between them,
to see what Tomcat is actually doing.  (How to make dumps -> see FAQ).

One usual cause is when you have infinite timeout on you database
connection pool.  So threads are waiting for your DB.  (If you are not
recycling sql objects properly, you may run out of them easily).

Best regards,
Konstantin Kolinko

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