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[MAPREDUCE-4728] Interaction between oob heartbeats and damper can cause TT to heartbeat with zero delay - MapReduce - [issue]
...When mapreduce.tasktracker.outofband.heartbeat is true and mapreduce.tasktracker.outofband.heartbeat.damper is something largish (like the default of 1000000), the TT doesn't wait for tasks ...
http://issues.apache.org/jira/browse/MAPREDUCE-4728    Author: Nathan Roberts, 2013-02-20, 22:00
[MAPREDUCE-4499] Looking for speculative tasks is very expensive in 1.x - MapReduce - [issue]
...When there are lots of jobs and tasks active in a cluster, the process of figuring out whether or not to launch a speculative task becomes very expensive. I could be missing something but it...
http://issues.apache.org/jira/browse/MAPREDUCE-4499    Author: Nathan Roberts, 2012-12-06, 22:20
[MAPREDUCE-4444] nodemanager fails to start when one of the local-dirs is bad - MapReduce - [issue]
http://issues.apache.org/jira/browse/MAPREDUCE-4444    Author: Nathan Roberts, 2012-10-11, 18:48
[MAPREDUCE-3094] org.apache.hadoop.streaming.TestUlimit.testCommandLine fails intermittantly in 20.205.0 - MapReduce - [issue]
...11/09/24 00:22:10 INFO mapred.TaskInProgress: Error from attempt_20110924002157563_0001_m_000000_0: java.lang.RuntimeException: PipeMapRed.waitOutputThreads(): subprocess failed with code 13...
http://issues.apache.org/jira/browse/MAPREDUCE-3094    Author: Nathan Roberts, 2011-09-26, 16:59
Re: Jiras need review - MapReduce - [mail # dev]
...I sent this query to Suresh yesterday. He is supposed to be driving this fr om Hortonworks side, if this list doesn't look correct, let me know.  project in (MAPREDUCE,HDFS,HADOOP) AND ...
   Author: Nathan Roberts, 2011-07-12, 15:13
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