[gentoo-java] CPU consumed by tomcat is always 100%

[gentoo-java] CPU consumed by tomcat is always 100%

[Kaushal Shriyan]

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Hi,

I am running the below software on gentoo OS.

Sun JDK 1.5.0.12 [sun-jdk-1.5]
[I--] [M ] www-servers/tomcat-5.0.27-r6 (5)

The issue is that the CPU consumed by tomcat is always 100%.while using top
command

Kindly provide me the steps to debug the issue

Thanks and Regards

Kaushal

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Re: [gentoo-java] CPU consumed by tomcat is always 100%

[Jean-Noël Rivasseau]

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1) Can you try to update to Tomcat 6 ?

2) Did you deploy any web-app in your container? If yes, the problem is most
likely due to your web-app (infinite loop most probably).

Elvanor

Kaushal Shriyan wrote:

On Tue, Mar 17, 2009 at 6:33 PM, Kaushal Shriyan
<kaushalshriyan@gmail.com>wrote:

> Hi,
>
> I am running the below software on gentoo OS.
>
> Sun JDK 1.5.0.12 [sun-jdk-1.5]
> [I--] [M ] www-servers/tomcat-5.0.27-r6 (5)
>
> The issue is that the CPU consumed by tomcat is always 100%.while using top
> command
>
> Kindly provide me the steps to debug the issue
>
> Thanks and Regards
>
> Kaushal
>

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Re: [gentoo-java] CPU consumed by tomcat is always 100%

[Sven Vermeulen]

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On Tue, Mar 17, 2009 at 7:28 PM, Jean-Noël Rivasseau <elvanor@gentoo.org>wrote:

> 1) Can you try to update to Tomcat 6 ?
>
> 2) Did you deploy any web-app in your container? If yes, the problem is
> most likely due to your web-app (infinite loop most probably).
>

Try taking threaddumps (kill -3 <pid>)  and watch the output. Perhaps you
can see from the dump where in your code (assuming it is the web application
code) the issue is.

If you take several dumps sequentially (with an interval of a few seconds)
you can try to parse the output with tools such as Samurai (Google for
"samurai thread analyzer").

Threaddump information is usually stored in the native standard out of the
java process.

Wkr,
  Sven Vermeulen

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