[MAPREDUCE-6002] MR task should prevent report error to AM when process is shutting down

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5.0
• Fix Version/s: 2.5.0
• Component/s: task
• Hadoop Flags: Reviewed
• Assignee: Wangda Tan
• Reporter: Wangda Tan
• Created: 24/Jul/14 02:49
• Updated: 06/Oct/16 13:58
• Resolved: 27/Jul/14 01:45

Description

With MAPREDUCE-5900, preempted MR task should not be treat as failed.
But it is still possible a MR task fail and report to AM when preemption take effect and the AM hasn't received completed container from RM yet. It will cause the task attempt marked failed instead of preempted.

An example is FileSystem has shutdown hook, it will close all FileSystem instance, if at the same time, the FileSystem is in-use (like reading split details from HDFS), MR task will fail and report the fatal error to MR AM. An exception will be raised:

2014-07-22 01:46:19,613 FATAL [IPC Server handler 10 on 56903] org.apache.hadoop.mapred.TaskAttemptListenerImpl: Task: attempt_1405985051088_0018_m_000025_0 - exited : java.io.IOException: Filesystem closed
	at org.apache.hadoop.hdfs.DFSClient.checkOpen(DFSClient.java:707)
	at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:776)
	at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:837)
	at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:645)
	at java.io.DataInputStream.readByte(DataInputStream.java:265)
	at org.apache.hadoop.io.WritableUtils.readVLong(WritableUtils.java:308)
	at org.apache.hadoop.io.WritableUtils.readVIntInRange(WritableUtils.java:348)
	at org.apache.hadoop.io.Text.readString(Text.java:464)
	at org.apache.hadoop.io.Text.readString(Text.java:457)
	at org.apache.hadoop.mapred.MapTask.getSplitDetails(MapTask.java:357)
	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:731)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:340)
	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:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1594)
	at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)

We should prevent this, because it is possible other exceptions happen when shutting down, we shouldn't report any of such exceptions to AM.

Issue Links

• is related to: TEZ-3462 Task attempt failure during container shutdown loses useful container diagnostics