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[MAPREDUCE-4848] TaskAttemptContext cast error during AM recovery - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-4848
Author: Jason Lowe,
2012-12-11, 05:35
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[MAPREDUCE-4852] Reducer should not signal fetch failures for disk errors on the reducer's side - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-4852
Author: Jason Lowe,
2012-12-06, 17:58
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[MAPREDUCE-4835] AM job metrics can double-count a job if it errors after entering a completion state - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-4835
Author: Jason Lowe,
2012-12-04, 00:47
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[MAPREDUCE-4825] JobImpl.finished doesn't expect ERROR as a final job state - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-4825
Author: Jason Lowe,
2012-11-30, 15:16
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[MAPREDUCE-4817] Hardcoded task ping timeout kills tasks localizing large amounts of data - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-4817
Author: Jason Lowe,
2012-11-29, 13:08
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[MAPREDUCE-4815] FileOutputCommitter.commitJob can be very slow for jobs with many output files - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-4815
Author: Jason Lowe,
2012-11-28, 14:27
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[MAPREDUCE-4804] Counters for the applicationmaster - MapReduce - [issue]
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...We should provide counters for the AM itself to track interesting items such as time spent garbage collecting, cpu time spent, etc. Currently there are no counters specifically for the...
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http://issues.apache.org/jira/browse/MAPREDUCE-4804
Author: Jason Lowe,
2012-11-16, 21:21
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[MAPREDUCE-4801] ShuffleHandler can generate large logs due to prematurely closed channels - MapReduce - [issue]
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...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...
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http://issues.apache.org/jira/browse/MAPREDUCE-4801
Author: Jason Lowe,
2012-11-16, 13:21
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[MAPREDUCE-4785] TestMRApp occasionally fails - MapReduce - [issue]
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...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:<...
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http://issues.apache.org/jira/browse/MAPREDUCE-4785
Author: Jason Lowe,
2012-11-10, 23:58
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[MAPREDUCE-4767] AM should flush AMInfos to history file - MapReduce - [issue]
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...When the ApplicationMaster starts up and generates (and potentially recovers) AMInfo records for the history file, those events should be flushed to disk in case the AM crashes badly. ...
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http://issues.apache.org/jira/browse/MAPREDUCE-4767
Author: Jason Lowe,
2012-11-01, 22:48
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