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https://issues.apache.org/jira/browse/LOG4J2-95?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484160#comment-13484160
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Aaron Shepherd commented on LOG4J2-95:
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Sorry for the confusion. I created a user library in Eclipse for all of the
log4j2 jars, source code and javadocs. I tried including the appender jar in
that same Eclipse library, but the physical location of the jar was different
from that of the log4j2 jars. After seeing your post, I have moved the jar to
the same directory as all of the log4j2 jars and I still get the class not
found error. Also, I have noticed that after removing the appender from my
project, packaging it in a jar, and adding that jar to my build path, my
HappyTest java execution is no longer finding the appender. I specified for
the configuration to look in my "com.log4j" package, but it appears to only be
looking for that package within the project itself.
> Adding a custom appender Appender
> ---------------------------------
>
> Key: LOG4J2-95
> URL: https://issues.apache.org/jira/browse/LOG4J2-95
> Project: Log4j 2
> Issue Type: Question
> Components: Configurators
> Affects Versions: 2.0-beta1
> Environment: Windows 7 x64, Java 7 x86, Eclipse 3.8.1 x86, Eclipse
> RCP plugin application
> Reporter: Robert Breunung
> Labels: appender, extend
> Attachments: Desktop.png, happyTestProject.rftjdtr, LogDemo.zip
>
>
> Hello,
> since two days I'm working with Log4j 2 . I try to migrate from Log4J. I'm
> using it in an Eclipse application. I put the necessary jars of the binary
> distribution into a basic plugin and a log4j2.xml into the root. This worked
> well so far. Now I tried to add a custom appender to log4j. The class is in
> the default source package of the Eclipse plugin. Annotations are set like in
> the homepage documentation.
> In the first try I tried to provide the package of the Appender via the
> log4j2.xml. I set the attribute package in the configuration element. It
> seemed to me, the attribute is completely ignored? At least the class from
> the given package was not loaded.
> In the second try I tried to provide the package via the static method
> '...log4j.core.config.plugin.PluginManager.addPackage'. I debugged the method
> to get a hint why it didn't work. It tried to transform my package
> 'com.application.logging' into a URI 'com/application/logging' and started to
> search with it somehow. It might have found them treating them as file, as
> the classes were lying in a subdirectory. But as there was no file scheme in
> the beginning of the URI, it searched a not existing jar.
> The XML parser of the configuration can't resolve the name of my appender in
> the end.
> Do you have an idea then I do anything wrong, or then there is an open issue?
> I can provide more details on request. Is there a programmatical way to
> register my appender to Log4J 2 before the Logger initialization?
> Sincerely
> Robert Breunung
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