java.util.ConcurrentModificationException

Apache's JIRA Issue Tracker | Mohammad Kamrul Islam | 2 years ago
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  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
  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
  3. 0

    Spawn ConcurrentModificationException

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    NEI item search gets stuck on highlighted search mode

    GitHub | 2 years ago | Haringat
    java.util.ConcurrentModificationException
  6. 0

    Why doesn't the compiler spot certain causes of ConcurrentModificationException

    Stack Overflow | 2 years ago
    java.util.ConcurrentModificationException
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Root Cause Analysis

  1. java.util.ConcurrentModificationException

    No message provided

    at java.util.LinkedList$ListItr.checkForComodification()
  2. Java RT
    LinkedList$ListItr.next
    1. java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966)
    2. java.util.LinkedList$ListItr.next(LinkedList.java:888)
    2 frames
  3. hadoop-yarn-common
    ContainerLogAppender.close
    1. org.apache.hadoop.yarn.ContainerLogAppender.close(ContainerLogAppender.java:94)
    1 frame
  4. Apache Log4j
    PropertyConfigurator.configure
    1. org.apache.log4j.helpers.AppenderAttachableImpl.removeAllAppenders(AppenderAttachableImpl.java:141)
    2. org.apache.log4j.Category.removeAllAppenders(Category.java:891)
    3. org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:759)
    4. org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648)
    5. org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514)
    6. org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:440)
    6 frames
  5. org.apache.pig
    PigRunner.run
    1. org.apache.pig.Main.configureLog4J(Main.java:740)
    2. org.apache.pig.Main.run(Main.java:384)
    3. org.apache.pig.PigRunner.run(PigRunner.java:49)
    3 frames
  6. org.apache.oozie
    PigMain.main
    1. org.apache.oozie.action.hadoop.PigMain.runPigJob(PigMain.java:283)
    2. org.apache.oozie.action.hadoop.PigMain.run(PigMain.java:223)
    3. org.apache.oozie.action.hadoop.LauncherMain.run(LauncherMain.java:37)
    4. org.apache.oozie.action.hadoop.PigMain.main(PigMain.java:76)
    4 frames
  7. Java RT
    Method.invoke
    1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    4. java.lang.reflect.Method.invoke(Method.java:483)
    4 frames
  8. org.apache.oozie
    LauncherMapper.map
    1. org.apache.oozie.action.hadoop.LauncherMapper.map(LauncherMapper.java:226)
    1 frame
  9. Hadoop
    YarnChild$2.run
    1. org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)
    2. org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:430)
    3. org.apache.hadoop.mapred.MapTask.run(MapTask.java:342)
    4. org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:167)
    4 frames
  10. Java RT
    Subject.doAs
    1. java.security.AccessController.doPrivileged(Native Method)
    2. javax.security.auth.Subject.doAs(Subject.java:422)
    2 frames
  11. Hadoop
    UserGroupInformation.doAs
    1. org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
    1 frame
  12. Hadoop
    YarnChild.main
    1. org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
    1 frame