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[MAPREDUCE-4889] AM should have a diagnostics message for invalid state transitions - MapReduce - [issue]
...When the ApplicationMaster encounters an invalid state transition in one of its many state machines (JobImpl, TaskImpl, TaskAttemptImpl, etc.) the job will fail with the ERROR state but the ...
http://issues.apache.org/jira/browse/MAPREDUCE-4889    Author: Jason Lowe, 2012-12-19, 02:25
[MAPREDUCE-4816] JobImpl Invalid event: JOB_TASK_ATTEMPT_COMPLETED at FAILED - MapReduce - [issue]
...Saw this in an AM log of a task that had failed:2012-11-21 23:26:44,533 ERROR [AsyncDispatcher event handler] org.apache.hadoop.mapreduce.v2.app.job.impl.JobImpl: Can't handle this event at ...
http://issues.apache.org/jira/browse/MAPREDUCE-4816    Author: Jason Lowe, 2012-12-11, 07:53
[MAPREDUCE-4848] TaskAttemptContext cast error during AM recovery - MapReduce - [issue]
...Recently saw an AM that failed and tried to recover, but the subsequent attempt quickly exited with its own failure during recovery:2012-12-05 02:33:36,752 FATAL [AsyncDispatcher event handl...
http://issues.apache.org/jira/browse/MAPREDUCE-4848    Author: Jason Lowe, 2012-12-11, 05:35
[MAPREDUCE-4852] Reducer should not signal fetch failures for disk errors on the reducer's side - MapReduce - [issue]
...Ran across a case where a reducer ran on a node where the disks were full, leading to an exception like this during the shuffle fetch:2012-12-05 09:07:28,749 INFO [fetcher#25] org.apache.had...
http://issues.apache.org/jira/browse/MAPREDUCE-4852    Author: Jason Lowe, 2012-12-06, 17:58
[MAPREDUCE-4835] AM job metrics can double-count a job if it errors after entering a completion state - MapReduce - [issue]
...If JobImpl enters the SUCCEEDED, FAILED, or KILLED state but then encounters an invalid state transition, it could double-count the job since jobs that encounter an error are considered fail...
http://issues.apache.org/jira/browse/MAPREDUCE-4835    Author: Jason Lowe, 2012-12-04, 00:47
[MAPREDUCE-4825] JobImpl.finished doesn't expect ERROR as a final job state - MapReduce - [issue]
...TestMRApp.testJobError is causing AsyncDispatcher to exit with System.exit due to an exception being thrown.  From the console output from testJobError:2012-11-27 18:46:15,240 ERROR [As...
http://issues.apache.org/jira/browse/MAPREDUCE-4825    Author: Jason Lowe, 2012-11-30, 15:16
[MAPREDUCE-4817] Hardcoded task ping timeout kills tasks localizing large amounts of data - MapReduce - [issue]
...When a task is launched and spends more than 5 minutes localizing files, the AM will kill the task due to ping timeout.  The AM's TaskHeartbeatHandler currently tracks tasks via a progr...
http://issues.apache.org/jira/browse/MAPREDUCE-4817    Author: Jason Lowe, 2012-11-29, 13:08
[MAPREDUCE-4815] FileOutputCommitter.commitJob can be very slow for jobs with many output files - MapReduce - [issue]
...If a job generates many files to commit then the commitJob method call at the end of the job can take minutes.  This is a performance regression from 1.x, as 1.x had the tasks commit di...
http://issues.apache.org/jira/browse/MAPREDUCE-4815    Author: Jason Lowe, 2012-11-28, 14:27
[MAPREDUCE-4801] ShuffleHandler can generate large logs due to prematurely closed channels - MapReduce - [issue]
...We ran into an instance where many nodes on a cluster ran out of disk space because the nodemanager logs were huge.  Examining the logs showed many, many shuffle errors due to either Cl...
http://issues.apache.org/jira/browse/MAPREDUCE-4801    Author: Jason Lowe, 2012-11-16, 13:21
[MAPREDUCE-4785] TestMRApp occasionally fails - MapReduce - [issue]
...TestMRApp is failing occasionally with this error:testUpdatedNodes(org.apache.hadoop.mapreduce.v2.app.TestMRApp): Expecting 2 more completion events for killed expected:<4> but was:<...
http://issues.apache.org/jira/browse/MAPREDUCE-4785    Author: Jason Lowe, 2012-11-10, 23:58
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