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http://jira.codehaus.org/browse/MJAVADOC-268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=228721#action_228721
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Erik Brakkee commented on MJAVADOC-268:
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I can also confirm it still exists in version 2.7. Reverting back to 2.5 solves
the problem, however with only drawback which is that there is no multi-module
javadoc available for the overall site. At least my site generation time
reduces now from 45 minutes to about 7.
> performance problem in AbstractJavadocMojo.getModulesLinks()
> ------------------------------------------------------------
>
> Key: MJAVADOC-268
> URL: http://jira.codehaus.org/browse/MJAVADOC-268
> Project: Maven 2.x Javadoc Plugin
> Issue Type: Bug
> Affects Versions: 2.6
> Environment: Apache Maven 2.2.0 (r788681; 2009-06-26 15:04:01+0200)
> Java version: 1.6.0_13
> Java home: /home/mkleint/javatools/jdk1.6.0_13/jre
> Default locale: en_US, platform encoding: UTF-8
> OS name: "linux" version: "2.6.29.6-desktop-2mnb" arch: "i386" Family: "unix"
> Reporter: Milos Kleint
> Assignee: Vincent Siveton
> Priority: Critical
> Fix For: 2.6.1
>
> Attachments: javadoc.patch
>
>
> The getModulesLinks() method is unacceptably slow under certain conditions:
> 1. project's url is defined
> 2. one or more projects in reactor do not have any java sources and are not
> of "pom" packaging.
> For such projects the apidocs/ output folder is never created resulting in
> repeated invokation of a forked javadoc goal. It's more severe with high
> number of modules in reactor and high number of modules without any java
> sources.
> as an example checkout "hg clone https://hg.kenai.com/hg/forceten~src";
> The immediate problem is in the apidocsFile.exists() condition that
> re-triggers the forked invokation. The attached patch fixes that. However it
> looks suspicitions that the method is being called repeatedly for each module
> at all. Maybe the aborting condition at the start of the method body is wrong
> (I was not able to decypher that)
> workaround is to use 2.5 or not to specify the url in pom.xml or set the
> detectOfflineLinks parameter to "false".
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