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From Mark Thomas <ma...@apache.org>
Subject Re: High cpu on Tomcat 8
Date Mon, 04 May 2015 09:18:54 GMT
On 03/05/2015 11:25, Greg Huber wrote:
> Hello,
> 
> After an upgrade to Tomcat 8.0.21 and (Oracle jdk1.8.0_40) I seem to be
> having an erratic high cpu issue, often  when the server gets busy.  The
> application was OK tomcat 7 and has not been modified since the upgrade.

Use ps to get the thread ID of the thread that is using the CPU.
Take a thread dump and find what that thread is doing (you'll need to
convert the thread ID  from decimal to hex). It is the stack trace of
that thread that will be interesting.

Mark


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