Re: Blocked trying to get lock: org.apache.log4j.spi.RootLogger

[Aakash Pravin Lodha <AL...@TechMahindra.com>]

Hi Dave,

I am also facing a similar issue of Blocked thread. We have increased file descriptor from 1024 to 2048 as suggested by you still the issue persists. Do we need to increase file descriptor to 65000 to resolve this issue. Is there any adverse effect on weblogic after increasing the file descriptor. Your suggestion is appreciated. Below are the thread dumps from managed server which shows the blocked thread.

###<Jul 21, 2015 9:23:58 AM IST> <Info> <Server> <aukpczbr.dc-dublin.de> <aukpczbr_p2> <[ACTIVE] ExecuteThread: '13' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1437467038573> <BEA-002634> <The server "pci_p2_ad_admin" disconnected from this server.>
####<Jul 21, 2015 9:23:58 AM IST> <Error> <WebLogicServer> <aukpczbr.dc-dublin.de> <aukpczbr_p2> <[STANDBY] ExecuteThread: '11' for queue: 'weblogic.kernel.Default (self-tuning)'> <<WLS Kernel>> <> <> <1437467038600> <BEA-000337> <[STUCK] ExecuteThread: '16' for queue: 'weblogic.kernel.Default (self-tuning)' has been busy for "652" seconds working on the request "weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl@58887aee", which is more than the configured time (StuckThreadMaxTime) of "600" seconds. Stack trace:
Thread-3471 "[STUCK] ExecuteThread: '16' for queue: 'weblogic.kernel.Default (self-tuning)'" <alive, suspended, blocked, priority=1, DAEMON> {
    -- Blocked trying to get lock: org.apache.log4j.spi.RootLogger@21cb1369[not locked]
    org.apache.log4j.Category.callAppenders(Category.java:204)
    org.apache.log4j.Category.forcedLog(Category.java:391)
    org.apache.log4j.Category.log(Category.java:856)
    org.slf4j.impl.Log4jLoggerAdapter.error(Log4jLoggerAdapter.java:541)
    com.vodafone.pciadaptor.core.emis.HttpConnectionProbe.onRun(HttpConnectionProbe.java:105)
    com.vodafone.pciadaptor.core.scheduling.AbstractScheduledTask.run(AbstractScheduledTask.java:42)
    org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:51)
    java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
    java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
    java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
    org.springframework.scheduling.commonj.TimerManagerTaskScheduler$TimerScheduledFuture.timerExpired(TimerManagerTaskScheduler.java:112)
    org.springframework.scheduling.commonj.TimerManagerTaskScheduler$ReschedulingTimerListener.timerExpired(TimerManagerTaskScheduler.java:165)
    weblogic.timers.internal.commonj.ListenerWrap.timerExpired(ListenerWrap.java:37)
    weblogic.timers.internal.TimerImpl.run(TimerImpl.java:273)
    weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:528)
    weblogic.work.ExecuteThread.execute(ExecuteThread.java:207)
    weblogic.work.ExecuteThread.run(ExecuteThread.java:176)
}

>


Thanks in Advance.

Regards,
Aakash Lodha



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