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From "Caldarale, Charles R" <Chuck.Caldar...@unisys.com>
Subject RE: Thread dump analysis
Date Wed, 28 Jan 2009 17:25:53 GMT
> From: Pieter Temmerman [mailto:ptemmerman.ext@sadiel.es]
> Subject: Re: Thread dump analysis
>
> Could it be that Tomcat ran out of connectors (maxThreads
> was hit) and after a while they get closed by the timeout?

Depends on how your DB connector pool is configured.

> This could be a plausible explanation, although, the weird thing still
> is why this coincides with the CPU topping 100%.

Could the infinite loop that these threads sometime get into include acquisition of a DB connection
at some point inside the loop?  If your DBC pool is set to discard unreturned connections
after some period of time, it will acquire more and those will become available for new requests.

 - Chuck


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