We use automatic restarts on OutOfMemory errors and it works fantastically. I
don't do it the way described here, though. I use the JVM's
-XX:OnOutOfMemoryError option. I add the following to CATALINA_OPTS:
-XX:OnOutOfMemoryError=/usr/sbin/restart_tcserver
...which restarts tcServer whenever an OOME occurs. Unfortunately, it doesn't
produce a stacktrace (it calls your script instead). But that's okay in my
case. I just want to make sure the server gets restarted.
We had one of these a while back, so I know it works fine (the restart script
also sends me an email--including "top" output--letting me know what happened).
Thanks!
Jon Brisbin
Portal Webmaster
NPC International, Inc.
On Apr 13, 2010, at 11:37 AM, Christopher Schultz wrote:
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> Eugene,
>
> On 4/13/2010 7:18 AM, Mirgorodskiy Eugene wrote:
>> I apologise if this theme described in documentation Tomcat, I badly
>> understand English language.
>>
>> Whether you could not answer me is in tomcat 6.0.X Service which
>> automatically would start Tomcat, at end of its work as a result of
>> an error or failure in software work.
>
> Tomcat does not provide this service. There may be such services
> available elsewhere, but I am unaware of them.
>
> You may be able to create your own, something like this:
>
> #!/bin/sh
>
> CATALINA_HOME=/opt/tomcat6
> CHECK_INTERVAL=30s
> RESTART_INTERVAL=10s
>
> while true ; do
> # Start TC in background
> "${CATALINA_HOME}/bin/catalina.sh" start
>
> # Repeatedly check stdout for errors
> while true ; do
> sleep ${CHECK_INTERVAL}
> grep OutOfMemoryError "${CATALINA_HOME}/logs/catalina.out"
>
> result = $?
> if [ "0" == "${result}" ] ; then
> break
> fi
> done
>
> # Stop TC
> "${CATALINA_HOME}/bin/catalina.sh" stop
> sleep ${RESTART_INTERVAL}
> done
>
> This will run Tomcat forever and restart it if any OutOfMemoryError
> messages are emitted to logs/catalina.out.
>
> You can certainly customize this to meet whatever other needs you may
> have. You can even have your webapp dump something into stdout (or some
> other file) and check that, too.
>
> Hope that helps,
> - -chris
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