Maybe an infinite loop? We observed something similar due to a bug in the java
regex impl and certain user input causes this regex looping behaviour. As this
locked one core but to the user it simply looked like server was not
responding, guess what happend? Right: they press refresh page and ne
I have a question about maxHttpHeaderSize [0]. In Apache httpd, there
are two different parameters that affect the maximum size of an HTTP
header, limitRequestFieldSize and limitRequestLine. [1] These
configuration values specify about 8 kilobytes per _line_ in the
incoming request. However, in Tom
Thanks for all the advice everyone!
There is a possibility that the CPU is caused by an app thread - I
am looking into that possibility. Will let you know when I find
out more.
Thanks,
Kirill
On 9/27/12 12:17 PM, Shanti Suresh wrote:
Hi Kirill,
I mistook that the CPU issue clears itself. Sorry. It may or may not be
related to Garbage-collection settings then.
-Shanti
On Thu, Sep 27, 2012 at 2:17 PM, Shanti Suresh wrote:
> Hi Kirill,
>
> Like Mark, Bill and Jeff said, those threads are normal reques
Hi Kirill,
Like Mark, Bill and Jeff said, those threads are normal request-processing
threads. I have included a script that might help with isolating high CPU
issues with Tomcat.
Also, I think it might be helpful to see how the Java heap is performing as
well.
Please bring up Jconsole and let i
I agree; we have reproducible instances where PermGen is not set to our
requirements on the Tomcat startup parameters and it will cause a "lockup"
every time. Do some JMX monitoring and you may discover a memory spike
that's killing Tomcat.
Bill
-Original Message-
From: Jeff MAURY [mailto:
This is probably due to out of memory, I have the same problem on my ubuntu
ci machine
Did you monitor your tomcat with jmx ?
Jeff
Le 27 sept. 2012 17:39, "Kirill Kireyev" a écrit :
> Hi!
>
> I'm periodically getting unduly high (100%) CPU usage by the tomcat
> process on my server. This problem
Kirill Kireyev wrote:
>Hi!
>
>I'm periodically getting unduly high (100%) CPU usage by the tomcat
>process on my server. This problems happens intermittently, several
>times a week. When the server goes into this high CPU it does not come
>back (and becomes unresponsive to new requests), and
Hi!
I'm periodically getting unduly high (100%) CPU usage by the tomcat
process on my server. This problems happens intermittently, several
times a week. When the server goes into this high CPU it does not come
back (and becomes unresponsive to new requests), and the only recourse
is to resta
