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https://issues.apache.org/jira/browse/LOG4J2-673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14320129#comment-14320129
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Nathaniel Auvil commented on LOG4J2-673:
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and i tried the transformer and it still does not work
<transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
<resource>META-INF/org/apache/logging/log4j/core/config/plugins/Log4j2Plugins.dat</resource>
</transformer>
> plugin preloading fails in shaded jar files
> -------------------------------------------
>
> Key: LOG4J2-673
> URL: https://issues.apache.org/jira/browse/LOG4J2-673
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.0-rc2, 2.1
> Reporter: mck
> Assignee: Matt Sicker
> Priority: Critical
> Labels: annotations, compiler, plugins
> Attachments:
> 0002-LOG4J2-673-plugin-preloading-fails-in-shaded-jar-fil.patch,
> 0005-LOG4J2-673-plugin-preloading-fails-in-shaded-jar-fil.patch
>
>
> Support for plugin preloading through the standard
> javax.annotation.processing tool was adding in LOG4J2-595
> But the plugin processor always creates and stores the processed "Plugin"
> annotated classes into the same file. This works fine when the classpath
> consists of individual jar files, but fails when shaded jar files are used.
> A tested fix exists at
> https://github.com/finn-no/logging-log4j2/tree/bugfix/LOG4J2-673
> There's also a github pull request and a manual diff attached. (I can clean
> up anything not used afterwards)
> The fix saves the dat file in a location under META-INF that matches the
> shared package all the processed plugins are found under.
> The package attribute in the config file is then used so that multiple dat
> files can be loaded at runtime.
> This means that the package attribute is no longer deprecated.
> This has been tested against
> https://github.com/finn-no/log4j2-logstash-jsonevent-layout
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