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[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, 2014-12-16, 18:40
[MAPREDUCE-5583] Ability to limit running map and reduce tasks - MapReduce - [issue]
...It would be nice if users could specify a limit to the number of map or reduce tasks that are running simultaneously.  Occasionally users are performing operations in tasks that can lea...
http://issues.apache.org/jira/browse/MAPREDUCE-5583    Author: Jason Lowe, 2014-12-08, 02:52
[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
[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, 2014-12-01, 03:11
[MAPREDUCE-6161] mapred hsadmin command missing from trunk - MapReduce - [issue]
...The hsadmin subcommand of the mapred script is no longer present in trunk. It is present in branch-2....
http://issues.apache.org/jira/browse/MAPREDUCE-6161    Author: Jason Lowe, 2014-11-20, 17:55
[MAPREDUCE-6162] mapred hsadmin fails on a secure cluster - MapReduce - [issue]
...Attempts to use mapred hsadmin fail on a secure cluster for a couple of reasons. The HSAdmin client isn't configuring the principal config key for the protocol, resulting in a "Failed to spe...
http://issues.apache.org/jira/browse/MAPREDUCE-6162    Author: Jason Lowe, 2014-11-18, 15:29
[MAPREDUCE-5114] Subsequent AM attempt can crash trying to read prior AM attempt information - MapReduce - [issue]
...Saw the second AM attempt of a job fail early during startup because it tried to read the AMInfos from the previous attempt's history file and hit an error that wasn't an IOException.  ...
http://issues.apache.org/jira/browse/MAPREDUCE-5114    Author: Jason Lowe, 2014-11-14, 16:09
[MAPREDUCE-6141] History server leveldb recovery store - MapReduce - [issue]
...It would be nice to have a leveldb option to the job history server recovery store.  Leveldb would provide some benefits over the existing filesystem store such as better support for at...
http://issues.apache.org/jira/browse/MAPREDUCE-6141    Author: Jason Lowe, 2014-10-30, 15:49
[MAPREDUCE-6022] map_input_file is missing from streaming job environment - MapReduce - [issue]
...When running a streaming job the 'map_input_file' environment variable is not being set.  This property is deprecated, but in the past deprecated properties still appeared in a stream j...
http://issues.apache.org/jira/browse/MAPREDUCE-6022    Author: Jason Lowe, 2014-10-30, 15:17
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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