[jira] [Commented] (MRRESOURCES-106) ProcessRemoteResourcesMojo#getProjects() can end up consuming a lot of memory for big projects

["Falko Modler (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MRRESOURCES-106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16625246#comment-16625246 ] 

Falko Modler commented on MRRESOURCES-106:
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[~hboutemy] I don't think my fix for MRRESOURCES-94 is going to help here:
The OP is actually using a velocity template which does use {{projectsSortedByOrganization}}, so the (expensive) lookup will still kick in, only at a later point.

> ProcessRemoteResourcesMojo#getProjects() can end up consuming a lot of memory for big projects
> ----------------------------------------------------------------------------------------------
>
>                 Key: MRRESOURCES-106
>                 URL: https://issues.apache.org/jira/browse/MRRESOURCES-106
>             Project: Maven Remote Resources Plugin
>          Issue Type: Bug
>    Affects Versions: 1.5
>            Reporter: Thomas Mortagne
>            Assignee: Hervé Boutemy
>            Priority: Major
>             Fix For: 1.6.0
>
>
> At XWiki we are using the remote resource plugin to generate a NOTICE files we put in the META-INF of all jars. The file can be found on https://github.com/xwiki/xwiki-commons/blob/master/xwiki-commons-tools/xwiki-commons-tool-license-resources/src/main/resources/META-INF/NOTICE.vm.
> We have a lot of memory issues and we kept increasing the max memory but it was starting to be a bit insane (we now get a OOM with -Xmx2500m) so I finally took a profiler to try to figure out where all this memory goes.
> We did noticed for a while that remote resource plugin is taking longer and longer to execute during the build so I had my doubts already.
> What Yourkit is telling me is that almost half of the memory (400MB here because I reduced the max memory for it to fail earlier) is retained by an ArrayList of MavenProject instances located in ProcessRemoteResourcesMojo#getProjects().
> It can be reproduced by building https://github.com/xwiki/xwiki-platform (you will need to add some repositories in your settings.xml, you can find them on http://dev.xwiki.org/xwiki/bin/view/Community/Building/#HInstallingMaven).
> Also I can probably put the memory dump I have somewhere if someone wants to download it.



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