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http://jira.qos.ch/browse/LBCLASSIC-267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ceki Gulcu resolved LBCLASSIC-267.
----------------------------------
Resolution: Duplicate
> Intermittent ConcurrentModificationException in
> LoggingEvent.prepareForDeferredProcessing
> -----------------------------------------------------------------------------------------
>
> Key: LBCLASSIC-267
> URL: http://jira.qos.ch/browse/LBCLASSIC-267
> Project: logback-classic
> Issue Type: Bug
> Affects Versions: 0.9.28
> Reporter: Anders Wallgren
> Assignee: Ceki Gulcu
> Priority: Critical
>
> Occasionally seeing this type of exception:
> 02:02:27,883 |-ERROR in com.electriccloud.log.AsyncAppender[ASYNC_FILE] -
> Appender [ASYNC_FILE] failed to append.
> java.util.ConcurrentModificationExceptionjava.util.ConcurrentModificationException
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
> at java.util.HashMap$EntryIterator.next(HashMap.java:834)
> at java.util.HashMap$EntryIterator.next(HashMap.java:832)
> at java.util.HashMap.putAllForCreate(HashMap.java:435)
> at java.util.HashMap.<init>(HashMap.java:225)
> at
> ch.qos.logback.classic.spi.LoggingEvent.prepareForDeferredProcessing(LoggingEvent.java:213)
> at com.electriccloud.log.AsyncAppender.append(AsyncAppender.java:132)
> at com.electriccloud.log.AsyncAppender.append(AsyncAppender.java:36)
> at ch.qos.logback.core.AppenderBase.doAppend(AppenderBase.java:85)
> at
> ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:64)
> at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:285)
> at ch.qos.logback.classic.Logger.callAppenders(Logger.java:272)
> at
> ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:473)
> at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:427)
> at ch.qos.logback.classic.Logger.debug(Logger.java:534)
> at com.electriccloud.log.Slf4jLog.debug(Slf4jLog.java:66)
> at com.electriccloud.log.Slf4jLog.log(Slf4jLog.java:202)
> at com.electriccloud.util.timer.Timer.logElapsed(Timer.java:324)
> at
> com.electriccloud.operations.OperationTimingAspect.logOperationPerformance(OperationTimingAspect.java:107)
> at sun.reflect.GeneratedMethodAccessor124.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:627)
> at
> org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:616)
> at
> org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:64)
> at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:160)
> at
> org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
> at
> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
> at
> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
> at $Proxy23.perform(Unknown Source)
> at
> com.electriccloud.operations.OperationInvoker.invoke(OperationInvoker.java:273)
> at
> com.electriccloud.operations.OperationCaller.call(OperationCaller.java:127)
> at
> com.electriccloud.operations.OperationCaller.call(OperationCaller.java:42)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> at com.electriccloud.util.CommanderThread.run(CommanderThread.java:105)
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