On Mon, Aug 19, 2013 at 7:52 PM, Mike Grogan <[email protected]>wrote:
> Sorry for # of questions from me recently ... trying to get my first
> geoserver instance running (and one question resulted in legitimate bug
> report) ...
>
> I am now having an issue with GWC ... specifically using the gmaps service
> ... taking a thread to 100% CPU use and hanging ... with no more response
> from the service. Any pointers toward debugging this?
>
> This seems to happen randomly ... sometimes it will happen quickly after a
> tomcat restart ... sometimes I won't see it again for a few hours. Not a
> huge load on server. Just me in development zooming and panning the maps,
> requesting tiles from the gmaps gwc service.
>
> jstack can't even seem to walk the stack in the hung thread. I get a
> "Error occurred during stack walking: java.lang.NullPointerException" from
> jstack on the specific PID
>
Hmm... not sure, but have you tried sending sigquit instead? Quoting from
http://www.crazysquirrel.com/computing/java/basics/java-thread-dump.jspx
-----------------------------------------
kill -QUIT process_id
There process_id is the process number of the running Java process. The
thread dump will be sent to wherever standard out is redirected too.
-----------------------------------------
Cheers
Andrea
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