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https://issues.apache.org/jira/browse/LOG4J2-378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13754000#comment-13754000
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Ralph Goers commented on LOG4J2-378:
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Your interpretation of the problem seems correct. Since the variable couldn't
be found the string itself would be used. But since a ":" isn't allowed in a
file nane on Windows it looks like it truncated the name to "${sys", although I
am not sure why it would be "${sys.".
As you noted, the order that the listeners are invoked is specified in the
servlet spec so I don't know why there would be a difference between the
behavior on Windows vs Linux.
Is it possible for you to just add the -Dapplication-name to setenv.sh?
> Logging generates file named ${sys on some systems
> --------------------------------------------------
>
> Key: LOG4J2-378
> URL: https://issues.apache.org/jira/browse/LOG4J2-378
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.0-beta8
> Environment: Issues occurs on Win7/64 system under Tomcat 7.0.42 /
> Oracle JDK 1.7.0_25; fails to occur on RHEL 5.2 system under Tomcat 7.0.26 /
> Oracle JDK 1.7.0_03
> Reporter: Eric Schwarzenbach
>
> In a webapp I'm setting a system property in my apps ServletContextListener,
> and using that system property in my log4j2.xml file, like so:
> {code}
> <appender type="FastFile" name="File"
> fileName="${sys:catalina.home}/logs/${sys:application-name}.log">
> {code}
> On my Windows machine, a log file named "${sys." (always 0 bytes) is being
> created instead of a log file with the application-name. The same war
> deployed on one of our linux servers does not create a ${sys." file and
> instead creates a log file with the intended application-name.
> I should note that the files DO appear in the directory that
> sys:catalina.home should resolve to. They appear elsewhere when I don't use
> sys:catalina.home so I'm quite sure that this variable is resolving correctly
> and it is the sys:application-name which is the problem.
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