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https://issues.apache.org/jira/browse/NUTCH-1148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13150502#comment-13150502
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Lewis John McGibbney commented on NUTCH-1148:
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I'm happy to see this one go Ferdy. It's been sitting for a while and has
slipped through thr net until now. Any other comments please?
> Nutchgora job jar functionalilty is broken: PluginManifestParser cannot load
> plugins from system classloader.
> -------------------------------------------------------------------------------------------------------------
>
> Key: NUTCH-1148
> URL: https://issues.apache.org/jira/browse/NUTCH-1148
> Project: Nutch
> Issue Type: Bug
> Affects Versions: nutchgora
> Reporter: Ferdy Galema
> Priority: Critical
> Attachments: NUTCH-1148-v1.patch
>
>
> This affects running nutchgora using Hadoop it's RunJar mechanism (hadoop jar
> ...). The mr tasks are perfectly able to load the plugins (please note
> NUTCH-937). But, when the plugins are loaded from the *job submitter* process
> itself, loading plugins might fail due to classloading issues. This is caused
> by the fact that PluginManifestParser does not use the contextClassLoader
> that is set by RunJar. This classloader contains the plugins folder. At least
> the FetcherJob is affected by this, because the job submitter uses getFields
> of Protocol implementations, therefore loading the plugins.
> The current 1.x is not affected because it does not load plugins at any point
> during the job submission. This might of course change so I propose to 'fix'
> the issue in the 1.x branch as well.
> The solution is fairly simple, PluginManifestParser should use the
> contextClassLoader of the current thread instead of using the system
> classloader. I will attach patch right away. It currently works but it still
> needs some further testing.
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