[GeoNode-users] Geoserver keeps CPU at 100%

Thu Jul 12 01:49:33 PDT 2018

Hi Simone,

well, yes, we have large raster files, but never had this kind of issue for months; we have been experiencing this bad Java behaviour only for a few days, and it always comes in after a few hours after every restart of Tomcat.
Of course it could just simply be that the average load is more than before; nevertheless, this is totally painful.

I'm currently trying to apply some fixes to my application on top of Geonode and I'll see if it helps.

Meanwhile, can you address me to any best practises about managing large raster files and to some Geoserver configurations that I may have skipped or don't know?

Thanks a lot,

Stefano

________________________________
From: Simone Giannecchini [simone.giannecchini at geo-solutions.it]
Sent: 11 July 2018 16:07
To: LUONI Stefano (JRC-ISPRA-EXT)
Cc: geonode-users at lists.osgeo.org
Subject: Re: [GeoNode-users] Geoserver keeps CPU at 100%

Dear Stefano,
something like that happens usually when you have large raster dataset that are not optimized and you put them under load.
Does this ring a bell?

Regards,
Simone Giannecchini
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On Wed, Jul 11, 2018 at 9:10 AM <Stefano.LUONI at ext.ec.europa.eu<mailto:Stefano.LUONI at ext.ec.europa.eu>> wrote:
Hi everyone,

I've been experiencing a strange issue for a few days now and I didn't manage to solve it yet. There is something wrong with Geoserver's Java threads, as after some usage, the navigation on website suddenly becomes slow and when executing a "top" on server, I find all CPU cores at 100% and a long list of tomcat8 processes running, even if no one is accessing the site.

Unfortunately, checking the logs doesn't give me a clue of what's happening, as warnings and errors are constantly changing and so far I was not able to spot the exact moment when Java failures are triggered.

I'm running Geonode 2.7.5, with Geoserver 2.12 snapshot on an Ubuntu 16.04 Server. I already tried upgrading both tomcat8 and OpenJDK from apt, but it didn't solve the issue.

These are building infos on Geoserver:

Build Information
GeoServer Version
2.12-SNAPSHOT
Git Revision
ba5175e3bcc4a5d2bc472809eccad682cc180cd8
Build Date
29-Mar-2018 14:27
GeoTools Version
18-SNAPSHOT (rev c41e79c4aaa3ec2db3b0f1e1ed4a5d485fddb75a)
GeoWebCache Version
1.12-SNAPSHOT (rev fd34a157375068f0a88f43f4abef154daaca7017/fd34a157375068f0a88f43f4abef154daaca7017)

I also tried updating Geoserver version to 2.13, but some layers (defined by SQL queries) stopped working, hence I had to rollback to 2.12.

This machine has been running fine for months, and only a few days ago started having this issue; we didn't install anything new, so I'm wondering if any of the layers uploaded is somehow causing the problem.

I attached an extraction of Geoserver log, hoping this can give you some hints.

Thanks,

Stefano
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