[YARN-2857] ConcurrentModificationException in ContainerLogAppender

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.7.0
• Target Version/s: 2.7.0
• Hadoop Flags: Reviewed
• Assignee: Mohammad Islam
• Reporter: Mohammad Islam
• Created: 24/Oct/14 20:47
• Updated: 10/Apr/15 20:10
• Resolved: 14/Nov/14 20:49

Description

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:

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...

in stderr:

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)