[Geoserver-devel] Memory leak in GetMap ?

Hi all, I get many LOG error messages: “Call MapContent dispose() to prevent memory leaks”

I think that they come from GetMap method (https://github.com/geoserver/geoserver/blob/master/src/wms/src/main/java/org/geoserver/wms/GetMap.java#L116) when an error occurs. The MapContent object never is disposed, and finally GC runs its finalize method.

I solve this issue adding the dispose call to the catch clause:
https://github.com/ahuarte47/geoserver/commit/7901f8bd404ae7f664b9a8795d2e7713dc871144

I am right?
It makes sense to create a pull request to fix it?

Best regards
Alvaro

On Tue, Jan 12, 2016 at 3:59 PM, A Huarte <ahuarte47@anonymised.com> wrote:

Hi all, I get many LOG error messages: "Call MapContent dispose() to
prevent memory leaks"

Yeah, that log statement is unfortunate and annoying, as I believe a memory
leak can only be generated if
there are layer and content listeners around, that GeoServer does not use.
But the check in the finalize method of MapContent is dumb
and it just keeps on complaining for nothing.

I think that they come from GetMap method (
https://github.com/geoserver/geoserver/blob/master/src/wms/src/main/java/org/geoserver/wms/GetMap.java#L116) when
an error occurs. The MapContent object never is disposed, and finally GC
runs its finalize method.

I solve this issue adding the dispose call to the catch clause:

https://github.com/ahuarte47/geoserver/commit/7901f8bd404ae7f664b9a8795d2e7713dc871144

I am right?

Seems like a good point to add it

It makes sense to create a pull request to fix it?

Yes please.

Cheers
Andrea

--

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@geowolf
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Done:

https://github.com/geoserver/geoserver/pull/1398

It does not contain a test, it is needed?

Best regards

Alvaro


De: Andrea Aime andrea.aime@anonymised.com
Para: A Huarte ahuarte47@anonymised.com
CC:geoserver-devel@lists.sourceforge.netgeoserver-devel@lists.sourceforge.net
Enviado: Martes 12 de enero de 2016 16:17
Asunto: Re: [Geoserver-devel] Memory leak in GetMap ?

On Tue, Jan 12, 2016 at 3:59 PM, A Huarte <ahuarte47@anonymised.com> wrote:

Hi all, I get many LOG error messages: “Call MapContent dispose() to prevent memory leaks”

Yeah, that log statement is unfortunate and annoying, as I believe a memory leak can only be generated if
there are layer and content listeners around, that GeoServer does not use. But the check in the finalize method of MapContent is dumb
and it just keeps on complaining for nothing.

I think that they come from GetMap method (https://github.com/geoserver/geoserver/blob/master/src/wms/src/main/java/org/geoserver/wms/GetMap.java#L116) when an error occurs. The MapContent object never is disposed, and finally GC runs its finalize method.

I solve this issue adding the dispose call to the catch clause:
https://github.com/ahuarte47/geoserver/commit/7901f8bd404ae7f664b9a8795d2e7713dc871144

I am right?

Seems like a good point to add it

It makes sense to create a pull request to fix it?

Yes please.

Cheers
Andrea

==
GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.

Geosolutions’ Winter Holidays from 24/12 to 6/1

Ing. Andrea Aime

@geowolf
Technical Lead

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
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 è 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.