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https://jira.codehaus.org/browse/MJAVADOC-308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=332204#comment-332204
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Jörg Hohwiller commented on MJAVADOC-308:
-----------------------------------------
After the error occurred with debug option enabled, I can manually invoke the
javadoc tool:
"C:\Program Files\Java\jdk1.7.0_25\jre\..\bin\javadoc.exe" -J-Xmx1800m @options
@packages
Then I get the exact error with some more debug output:
Generating
C:\Users\hohwille\projects\mmm\mmm-client\mmm-client-ui\mmm-client-ui-widget\mmm-client-ui-widget-api\target\site\apidocs\net\sf\mmm\client\ui\base\widget\custom\pattern\package-use.html...
Building index for all the packages and classes...
Generating
C:\Users\hohwille\projects\mmm\mmm-client\mmm-client-ui\mmm-client-ui-widget\mmm-client-ui-widget-api\target\site\apidocs\overview-tree.html...
javadoc: error - java.lang.OutOfMemoryError: Please increase memory.
For example, on the JDK Classic or HotSpot VMs, add the option -J-Xmx
such as -J-Xmx32m.
1 error
35 warnings
So there is a strange bug in generation of overview-tree.html. This should
indicate that the bug is in javadoc. But there must be a difference in what
happens when I can "mvn javadoc:javadoc". Seems I am still missing a little
detail...
> OutOfMemoryError
> ----------------
>
> Key: MJAVADOC-308
> URL: https://jira.codehaus.org/browse/MJAVADOC-308
> Project: Maven Javadoc Plugin
> Issue Type: Bug
> Affects Versions: 2.6.1, 2.7
> Environment: Maven 3 on MacOS 10.6, Maven 3 on Hudson on Windows
> Reporter: Pieter
>
> I have a 12 module project (+parent) containing not really much code (140
> classes). When running Maven site on this project, it fails with an
> OutOfMemoryError. When I run the javadoc plugin with a reportset containing
> javadoc, test-javadoc and aggregate is runs well with a maximum heap size of
> 512M. When I run it with a reportset containing javadoc, test-javadoc and
> test-aggregate also. But when I add all 4 reports to my report set, I get an
> OutOfMemoryError, even when setting the maximum heap size to 1.5G. Just
> before the error occurs I see my heap usage growing rapidly.
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