[Geoserver-users] Garbage collector pauses Geoserver?

[Bartek Burkot]

Hi Geoserver users
 
I observed that my geoserver sometimes (ones a few days) stops working. 
I've read here: http://docs.geoserver.org/latest/en/user/production/container.html that the JAVA option: -XX:+UseParallelGC can  cause pauses in geoserver work.
Can this be a reason why my geoserver sometimes stops working?
 
 
Geoserver is hanging it means that Tomcat admin web app is working but geoserver requests end with timeouts. There is nothing in geoserver log file and also nothing in tomcat log file. Only what I see is that in Tomcat admin page in Server Status there are hanging requests. There are REST API and getMap requests. They hang since ~2000 seconds. After Tomcat restart everything is working well. 
I'm using the default GC settings. There is a high traffic which loads geoserver so maybe GC is involved?
 
Regards
 
Bartek
 

[Bartek Burkot]

Hi Geoserver users

I observed that my geoserver sometimes (ones a few days) stops working.
I've read here: http://docs.geoserver.org/latest/en/user/production/container.html that the JAVA option: -XX:+UseParallelGC can cause pauses in geoserver work.
Can this be a reason why my geoserver sometimes stops working?


Geoserver is hanging it means that Tomcat admin web app is working but geoserver requests end with timeouts. There is nothing in geoserver log file and also nothing in tomcat log file. Only what I see is that in Tomcat admin page in Server Status there are hanging requests. There are REST API and getMap requests. They hang since ~2000 seconds. After Tomcat restart everything is working well.
I'm using the default GC settings. There is a high traffic which loads geoserver so maybe GC is involved?

Thanks for your help

Bartek

[Andrea Aime]

Hi,
it's rather unlikely that garbage collection blocks a thread for 2000
seconds (actually, it's probably impossible,
it should stop and throw a "OOM, GC overhead exceeded" way before that).

First, are you using a supported version of GeoServer? E.g., 2.10.x or
2.11.x? If not, upgrade first (or look
for the commercial support link at geoserver.org, the community only tries
to support 2.10 and 2.11, but commercial
providers will likely provide help for older versions too).

If you are already on a supported version, wait until GeoServer locks up,
identiy its process id, and then run
jstack against it:
http://docs.geoserver.org/latest/en/user/production/troubleshooting.html#jstack
Finally, share the output of the command back on this list, it should give
us some indication of what is causing
the lockup.

Cheers
Andrea

Post by Bartek Burkot
Hi Geoserver users
I observed that my geoserver sometimes (ones a few days) stops working.
I've read here: http://docs.geoserver.org/latest/en/user/production/
container.html that the JAVA option: -XX:+UseParallelGC can cause pauses
in geoserver work.
Can this be a reason why my geoserver sometimes stops working?
Geoserver is hanging it means that Tomcat admin web app is working but
geoserver requests end with timeouts. There is nothing in geoserver log
file and also nothing in tomcat log file. Only what I see is that in Tomcat
admin page in Server Status there are hanging requests. There are REST API
and getMap requests. They hang since ~2000 seconds. After Tomcat restart
everything is working well.
I'm using the default GC settings. There is a high traffic which loads
geoserver so maybe GC is involved?
Thanks for your help
Bartek
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Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: [phone]
fax: [phone]
mob: [phone]

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

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[Bartek Burkot]

Hi Andrea
 
Thanks for the hint. I will follow it.
 
Cheers
Bartek
 
W dniu 2017-06-02 17:43:39 uÅŒytkownik Andrea Aime <***@geo-solutions.it> napisał:
Hi,
it's rather unlikely that garbage collection blocks a thread for 2000 seconds (actually, it's probably impossible,
it should stop and throw a "OOM, GC overhead exceeded" way before that).
 
First, are you using a supported version of GeoServer? E.g., 2.10.x or 2.11.x? If not, upgrade first (or look
for the commercial support link at geoserver.org, the community only tries to support 2.10 and 2.11, but commercial
providers will likely provide help for older versions too).
 
If you are already on a supported version, wait until GeoServer locks up, identiy its process id, and then run
jstack against it:
http://docs.geoserver.org/latest/en/user/production/troubleshooting.html#jstack
Finally, share the output of the command back on this list, it should give us some indication of what is causing
the lockup.
 
Cheers
Andrea
 
On Fri, Jun 2, 2017 at 5:22 PM, Bartek Burkot <***@poczta.onet.pl> wrote:
Hi Geoserver users
I observed that my geoserver sometimes (ones a few days) stops working.
I've read here: http://docs.geoserver.org/latest/en/user/production/container.html that the JAVA option: -XX:+UseParallelGC can  cause pauses in geoserver work.
Can this be a reason why my geoserver sometimes stops working?
Geoserver is hanging it means that Tomcat admin web app is working but geoserver requests end with timeouts. There is nothing in geoserver log file and also nothing in tomcat log file. Only what I see is that in Tomcat admin page in Server Status there are hanging requests. There are REST API and getMap requests. They hang since ~2000 seconds. After Tomcat restart everything is working well.
I'm using the default GC settings. There is a high traffic which loads geoserver so maybe GC is involved?
Thanks for your help
Bartek
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==
GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.
==
 
Ing. Andrea Aime 
@geowolf
Technical Lead
 
GeoSolutions S.A.S.
Via di Montramito 3/A
55054  Massarosa (LU)
phone: [phone]
fax: [phone]
mob: +39  339 8844549
 
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
 
AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo Ú consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.
 
The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility  for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.
 
-------------------------------------------------------