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From "Remko Popma (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LOG4J2-493) Problem with AsyncLogger when web app is deployed/undeployed multiple times
Date Fri, 20 Jun 2014 04:47:27 GMT

     [ https://issues.apache.org/jira/browse/LOG4J2-493?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Remko Popma updated LOG4J2-493:
-------------------------------

    Labels: Async  (was: )

> Problem with AsyncLogger when web app is deployed/undeployed multiple times
> ---------------------------------------------------------------------------
>
>                 Key: LOG4J2-493
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-493
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.0-beta9, 2.0-rc1
>         Environment: tomcat 7.0.42
>            Reporter: Kireet Reddy
>            Assignee: Remko Popma
>              Labels: Async
>
> When redeploying my application in tomcat multiple times, I get an exception:
> {code}
> Exception in thread "Thread-29" java.lang.NullPointerException
>         at org.apache.logging.log4j.core.async.AsyncLogger.stop(AsyncLogger.java:249)
>         at org.apache.logging.log4j.core.async.AsyncLoggerContext.stop(AsyncLoggerContext.java:56)
>         at org.apache.logging.log4j.core.LoggerContext$ShutdownThread.run(LoggerContext.java:437)
> {code}
> This seems to be due to the fact that some initialization code happens in the class initializer
but is undone in the stop() method which is called during webapp undeployment. This causes
issues because in this case the log4j jar is loaded by the shared classloader ($catalina.home/lib)
rather than the webapp classloader. This means the AsyncLogger class is not re-created during
webapp deployment. 
> I am using this structure because I have many 3rd party libraries and want to keep redeployments
lightweight. 



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