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http://issues.apache.org/bugzilla/show_bug.cgi?id=41215

           Summary: Deadlock with RollingFileAppender
           Product: Log4j
           Version: unspecified
          Platform: Sun
        OS/Version: Solaris
            Status: NEW
          Severity: major
          Priority: P2
         Component: Appender
        AssignedTo: [email protected]
        ReportedBy: [EMAIL PROTECTED]


We have got a multi-threaded enterprise application running on highly loaded 
weblogic server. We are getting this below error very frequently and causing 
our production server to go down. 

Pls see below Thread trace :

"ExecuteThread: '33' for queue: 'weblogic.kernel.Default'" daemon prio=5 
tid=0x30a8f0 nid=0x2d waiting for monitor entry [8fcfe000..8fd019bc]
        at org.apache.log4j.RollingFileAppender.rollOver
(RollingFileAppender.java:126)
        at org.apache.log4j.RollingFileAppender.subAppend
(RollingFileAppender.java:228)
        at org.apache.log4j.WriterAppender.append(WriterAppender.java:150)
        at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:221)
        - locked <b71560a8> (a org.apache.log4j.RollingFileAppender)
        at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders
(AppenderAttachableImpl.java:57)
        at org.apache.log4j.Category.callAppenders(Category.java:187)
        - locked <b715d2d0> (a org.apache.log4j.Logger)
        at org.apache.log4j.Category.forcedLog(Category.java:372)

Thread dump 1/4
" Thread-25402 <threadFilter.do?mode=ModeAllThreads&FullThreadIndex=0>" prio=5 
tid=0x14f92d0 nid=0x638b waiting for monitor entry [8a301000..8a3019bc]
    at org.apache.log4j.Category.callAppenders(Category.java:185)
    - waiting to lock <b715d2d0> (a org.apache.log4j.Logger)
    at org.apache.log4j.Category.forcedLog(Category.java:372)
    at org.apache.log4j.Category.log(Category.java:864)

Is there any know solution/patch for this error?

Thanks
Srinivas

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