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[MAPREDUCE-4833] Task can get stuck in FAIL_CONTAINER_CLEANUP - MapReduce - [issue]
...If an NM goes down and the AM still tries to launch a container on it the ContainerLauncherImpl can get stuck in an RPC timeout.  At the same time the RM may notice that the NM has gone...
http://issues.apache.org/jira/browse/MAPREDUCE-4833    Author: Robert Joseph Evans, 2013-02-15, 13:10
[MAPREDUCE-4822] Unnecessary conversions in History Events - MapReduce - [issue]
...There are a number of conversions in the Job History Event classes that are totally unnecessary.  It appears that they were originally used to convert from the internal avro format, but...
http://issues.apache.org/jira/browse/MAPREDUCE-4822    Author: Robert Joseph Evans, 2013-02-15, 13:10
[MAPREDUCE-4752] Reduce MR AM memory usage through String Interning - MapReduce - [issue]
...There are a lot of strings that are duplicates of one another in the AM.  This comes from all of the PB events the come across the wire and also tasks heart-beating in through the umbil...
http://issues.apache.org/jira/browse/MAPREDUCE-4752    Author: Robert Joseph Evans, 2013-02-06, 17:05
[MAPREDUCE-4740] only .jars can be added to the Distributed Cache classpath - MapReduce - [issue]
...Koji tracked down this one.$ cat mycat.sh#!/bin/shcat >& /dev/null$JAVA_HOME/bin/jinfo $PPID | grep java.class.pathexport | grep CLASSPATHls -l $ myfile=/user/me/myclasses.zip; yarn j...
http://issues.apache.org/jira/browse/MAPREDUCE-4740    Author: Robert Joseph Evans, 2013-02-06, 17:05
[MAPREDUCE-4748] Invalid event: T_ATTEMPT_SUCCEEDED at SUCCEEDED - MapReduce - [issue]
...We saw this happen when running a large pig script.2012-10-23 22:45:24,986 ERROR [AsyncDispatcher event handler] org.apache.hadoop.mapreduce.v2.app.job.impl.TaskImpl: Can't handle this event...
http://issues.apache.org/jira/browse/MAPREDUCE-4748    Author: Robert Joseph Evans, 2013-02-06, 17:05
[MAPREDUCE-4912] Investigate ways to clean up double job commit prevention - MapReduce - [issue]
...Once MAPREDUCE-4819 goes in it fixes the issue where an OutputCommiter can double commit a job.  So that the output will never be touched after the job informs externally of success or ...
http://issues.apache.org/jira/browse/MAPREDUCE-4912    Author: Robert Joseph Evans, 2013-01-04, 15:28
[MAPREDUCE-4832] MR AM can get in a split brain situation - MapReduce - [issue]
...It is possible for a networking issue to happen where the RM thinks an AM has gone down and launches a replacement, but the previous AM is still up and running.  If the previous AM does...
http://issues.apache.org/jira/browse/MAPREDUCE-4832    Author: Robert Joseph Evans, 2013-01-04, 09:15
[MAPREDUCE-2494] Make the distributed cache delete entires using LRU priority - MapReduce - [issue]
...Currently the distributed cache will wait until a cache directory is above a preconfigured threshold.  At which point it will delete all entries that are not currently being used.  ...
http://issues.apache.org/jira/browse/MAPREDUCE-2494    Author: Robert Joseph Evans, 2012-11-21, 11:07
[MAPREDUCE-4805] History files are not move to where the history server sees them - MapReduce - [issue]
...It looks like MAPREDUCE-4723 added in a default case to the JobHistoryEventHandler that is causing it to have lots of issues for events that should just be ignored....
http://issues.apache.org/jira/browse/MAPREDUCE-4805    Author: Robert Joseph Evans, 2012-11-19, 16:55
[MAPREDUCE-4480] T_ATTEMPT_KILLED after SUCCEEDED can happen for reduces too - MapReduce - [issue]
...This does not seem to impact 0.23.  If speculative execution is enabled then a T_ATTEMPT_KILLED event can come in after the task has transitioned to SUCCEEDED.  This causes the Map...
http://issues.apache.org/jira/browse/MAPREDUCE-4480    Author: Robert Joseph Evans, 2012-11-15, 16:05
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