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https://issues.apache.org/jira/browse/LOG4J2-962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14342500#comment-14342500
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Gary Gregory commented on LOG4J2-962:
-------------------------------------
Do you call {{MapLookup.setMainArguments(args);}} as documented on
https://logging.apache.org/log4j/2.x/manual/lookups.html#AppMainArgsLookup ?
> Main Arguments Lookup not working
> ---------------------------------
>
> Key: LOG4J2-962
> URL: https://issues.apache.org/jira/browse/LOG4J2-962
> Project: Log4j 2
> Issue Type: Bug
> Components: Lookups
> Affects Versions: 2.1
> Environment: Windows 7 x64, Java Batch Application
> Reporter: Johannes Siebel
>
> It is not possible to use the Main Arguments Lookup in the current version.
> The "main" prefix is not present in the corresponding Interpolator object and
> thus the resolution of the variable - e.g. ${main:0} - is not working as
> advertised in the documentation. As far as I can tell, the problem seems to
> stem from the PluginManger.collectPlugins-Method that does not acknowledge
> the existence of the Main Arguments Lookup.
> Following the documentation on the website with the following sample
> log4j2.xml:
> {code:xml}
> <File name="GLOBAL" fileName="${env:DATA_DIR}/log/${env:APP_NAME}.log" >
> <PatternLayout pattern="%m%n" header="File: ${main:0}" />
> ...
> {code}
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