java.util.ConcurrentModificationException: null

Apache's JIRA Issue Tracker | Mohammad Kamrul Islam | 2 years ago
  1. 0

    Context: * Hadoop-2.3.0 * Using Oozie 4.0.1 * Pig version 0.11.x The job is submitted by Oozie to launch Pig script. The following exception traces were found on MR task log: In syslog: {noformat} 2014-10-24 20:37:29,317 WARN [Thread-5] org.apache.hadoop.util.ShutdownHookManager: ShutdownHook '' failed, java.util.ConcurrentModificationException java.util.ConcurrentModificationException at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966) at java.util.LinkedList$ListItr.next(LinkedList.java:888) at org.apache.hadoop.yarn.ContainerLogAppender.close(ContainerLogAppender.java:94) at org.apache.log4j.helpers.AppenderAttachableImpl.removeAllAppenders(AppenderAttachableImpl.java:141) at org.apache.log4j.Category.removeAllAppenders(Category.java:891) at org.apache.log4j.Hierarchy.shutdown(Hierarchy.java:471) at org.apache.log4j.LogManager.shutdown(LogManager.java:267) at org.apache.hadoop.mapred.TaskLog.syncLogsShutdown(TaskLog.java:286) at org.apache.hadoop.mapred.TaskLog$2.run(TaskLog.java:339) at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:54) 2014-10-24 20:37:29,395 INFO [main] org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping MapTask metrics system... {noformat} in stderr: {noformat} java.util.ConcurrentModificationException at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966) at java.util.LinkedList$ListItr.next(LinkedList.java:888) at org.apache.hadoop.yarn.ContainerLogAppender.close(ContainerLogAppender.java:94) at org.apache.log4j.helpers.AppenderAttachableImpl.removeAllAppenders(AppenderAttachableImpl.java:141) at org.apache.log4j.Category.removeAllAppenders(Category.java:891) at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:759) at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514) at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:440) at org.apache.pig.Main.configureLog4J(Main.java:740) at org.apache.pig.Main.run(Main.java:384) at org.apache.pig.PigRunner.run(PigRunner.java:49) at org.apache.oozie.action.hadoop.PigMain.runPigJob(PigMain.java:283) at org.apache.oozie.action.hadoop.PigMain.run(PigMain.java:223) at org.apache.oozie.action.hadoop.LauncherMain.run(LauncherMain.java:37) at org.apache.oozie.action.hadoop.PigMain.main(PigMain.java:76) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.apache.oozie.action.hadoop.LauncherMapper.map(LauncherMapper.java:226) at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54) at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:430) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:342) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:167) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162) {noformat}

    Apache's JIRA Issue Tracker | 2 years ago | Mohammad Kamrul Islam
    java.util.ConcurrentModificationException: null
  2. 0

    Context: * Hadoop-2.3.0 * Using Oozie 4.0.1 * Pig version 0.11.x The job is submitted by Oozie to launch Pig script. The following exception traces were found on MR task log: In syslog: {noformat} 2014-10-24 20:37:29,317 WARN [Thread-5] org.apache.hadoop.util.ShutdownHookManager: ShutdownHook '' failed, java.util.ConcurrentModificationException java.util.ConcurrentModificationException at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966) at java.util.LinkedList$ListItr.next(LinkedList.java:888) at org.apache.hadoop.yarn.ContainerLogAppender.close(ContainerLogAppender.java:94) at org.apache.log4j.helpers.AppenderAttachableImpl.removeAllAppenders(AppenderAttachableImpl.java:141) at org.apache.log4j.Category.removeAllAppenders(Category.java:891) at org.apache.log4j.Hierarchy.shutdown(Hierarchy.java:471) at org.apache.log4j.LogManager.shutdown(LogManager.java:267) at org.apache.hadoop.mapred.TaskLog.syncLogsShutdown(TaskLog.java:286) at org.apache.hadoop.mapred.TaskLog$2.run(TaskLog.java:339) at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:54) 2014-10-24 20:37:29,395 INFO [main] org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping MapTask metrics system... {noformat} in stderr: {noformat} java.util.ConcurrentModificationException at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966) at java.util.LinkedList$ListItr.next(LinkedList.java:888) at org.apache.hadoop.yarn.ContainerLogAppender.close(ContainerLogAppender.java:94) at org.apache.log4j.helpers.AppenderAttachableImpl.removeAllAppenders(AppenderAttachableImpl.java:141) at org.apache.log4j.Category.removeAllAppenders(Category.java:891) at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:759) at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514) at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:440) at org.apache.pig.Main.configureLog4J(Main.java:740) at org.apache.pig.Main.run(Main.java:384) at org.apache.pig.PigRunner.run(PigRunner.java:49) at org.apache.oozie.action.hadoop.PigMain.runPigJob(PigMain.java:283) at org.apache.oozie.action.hadoop.PigMain.run(PigMain.java:223) at org.apache.oozie.action.hadoop.LauncherMain.run(LauncherMain.java:37) at org.apache.oozie.action.hadoop.PigMain.main(PigMain.java:76) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at org.apache.oozie.action.hadoop.LauncherMapper.map(LauncherMapper.java:226) at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54) at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:430) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:342) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:167) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162) {noformat}

    Apache's JIRA Issue Tracker | 2 years ago | Mohammad Kamrul Islam
    java.util.ConcurrentModificationException: null
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  4. 0

    ConcurrentModificationException in invoice code

    GitHub | 1 month ago | sbrossie
    org.killbill.notificationq.NotificationQueueException: java.util.ConcurrentModificationException

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    Root Cause Analysis

    1. java.util.ConcurrentModificationException

      null

      at java.util.LinkedList$ListItr.checkForComodification()
    2. Java RT
      LinkedList$ListItr.next
      1. java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:761)
      2. java.util.LinkedList$ListItr.next(LinkedList.java:696)
      2 frames
    3. hadoop-yarn-common
      TestContainerLogAppender.testAppendInClose
      1. org.apache.hadoop.yarn.ContainerLogAppender.close(ContainerLogAppender.java:81)
      2. org.apache.hadoop.yarn.TestContainerLogAppender.testAppendInClose(TestContainerLogAppender.java:44)
      2 frames