java.util.ConcurrentModificationException

There are no available Samebug tips for this exception. Do you have an idea how to solve this issue? A short tip would help users who saw this issue last week.

  • 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$2.run(YarnChild.java:167) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162) {noformat}
    via by Mohammad Kamrul Islam,
  • Context: * Hadoop-2.3.0 * Using Oozie 4.0.1 * Pig version 0.11.x The job is submitted by Oozie to launch Pig script. The following exception traces were found on MR task log: In syslog: {noformat} 2014-10-24 20:37:29,317 WARN [Thread-5] org.apache.hadoop.util.ShutdownHookManager: ShutdownHook '' failed, java.util.ConcurrentModificationException java.util.ConcurrentModificationException at java.util.LinkedList$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$2.run(YarnChild.java:167) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162) {noformat}
    via by Mohammad Kamrul Islam,
  • Server crash "onWorldSave"
    via GitHub by ET-Bent
    ,
  • Galacticraft 1.6.4 Crash
    via GitHub by BlayzerQ
    ,
  • GitHub comment 164#162946078
    via GitHub by vlad2
    ,
    • java.util.ConcurrentModificationException at java.util.LinkedList$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)

    Users with the same issue

    Unknown visitor1 times, last one,
    Unknown visitor1 times, last one,
    Hronom
    7 times, last one,
    osvzs
    1 times, last one,
    tvrmsmith
    1 times, last one,
    1 more bugmates