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[MAPREDUCE-5891] Improved shuffle error handling across NM restarts - MapReduce - [issue]
...To minimize the number of map fetch failures reported by reducers across an NM restart it would be nice if reducers only reported a fetch failure after trying for at specified period of time...
http://issues.apache.org/jira/browse/MAPREDUCE-5891    Author: Jason Lowe, 2015-04-02, 14:49
[MAPREDUCE-4099] ApplicationMaster may fail to remove staging directory - MapReduce - [issue]
...When the ApplicationMaster shuts down it's supposed to remove the staging directory, assuming properties weren't set to override this behavior. During shutdown the AM tells the ResourceManag...
http://issues.apache.org/jira/browse/MAPREDUCE-4099    Author: Jason Lowe, 2015-04-02, 01:42
[MAPREDUCE-5079] Recovery should restore task state from job history info directly - MapReduce - [issue]
...We've encountered a lot of hanging issues during MR-AM recovery because the state machines don't always end up in the same states after recovery.  This is especially true when speculati...
http://issues.apache.org/jira/browse/MAPREDUCE-5079    Author: Jason Lowe, 2015-03-18, 11:58
[MAPREDUCE-6261] NullPointerException if MapOutputBuffer.flush invoked twice - MapReduce - [issue]
...MapOutputBuffer.flush will throw an NPE if it is invoked twice, since it blindly assumes kvbuffer is not null yet sets kvbuffer to null towards the end of the method....
http://issues.apache.org/jira/browse/MAPREDUCE-6261    Author: Jason Lowe, 2015-02-19, 15:21
[MAPREDUCE-6225] Fix new findbug warnings in hadoop-mapreduce-client-core - MapReduce - [issue]
...Recent precommit builds in hadoop-mapreduce-client-core are flagging findbug warnings that appear to be new with the recent findbugs upgrade.  These need to be cleaned up....
http://issues.apache.org/jira/browse/MAPREDUCE-6225    Author: Jason Lowe, 2015-02-17, 15:31
[MAPREDUCE-5727] History server web page can filter without showing filter keyword - MapReduce - [issue]
...I loaded up a job conf page on the history server and used one of the search boxes to narrow the results.  I then navigated to other pages (e.g.: map tasks, logs, etc.) then navigated b...
http://issues.apache.org/jira/browse/MAPREDUCE-5727    Author: Jason Lowe, 2015-02-11, 17:10
[MAPREDUCE-5267] History server should be more robust when cleaning old jobs - MapReduce - [issue]
...Ran across a situation where an admin user had accidentally created a directory in one of the date directories under /mapred/history/done/ that was not readable by the historyserver user. &n...
http://issues.apache.org/jira/browse/MAPREDUCE-5267    Author: Jason Lowe, 2015-02-11, 16:12
[MAPREDUCE-5044] Have AM trigger jstack on task attempts that timeout before killing them - MapReduce - [issue]
...When an AM expires a task attempt it would be nice if it triggered a jstack output via SIGQUIT before killing the task attempt.  This would be invaluable for helping users debug their h...
http://issues.apache.org/jira/browse/MAPREDUCE-5044    Author: Jason Lowe, 2015-02-05, 19:22
[MAPREDUCE-6172] TestDbClasses timeouts are too aggressive - MapReduce - [issue]
...Some of the TestDbClasses test timeouts are only 1 second, and some of those tests perform disk I/O which could easily exceed the test timeout if the disk is busy or there's some other hiccu...
http://issues.apache.org/jira/browse/MAPREDUCE-6172    Author: Jason Lowe, 2014-12-02, 15:27
[MAPREDUCE-5885] build/test/test.mapred.spill causes release audit warnings - MapReduce - [issue]
...Multiple unit tests are creating files under hadoop-mapreduce-client-jobclient/build/test/test.mapred.spill which are causing release audit warnings during Jenkins patch precommit builds. &n...
http://issues.apache.org/jira/browse/MAPREDUCE-5885    Author: Jason Lowe, 2014-12-01, 03:11
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB