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[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, 2014-04-14, 15:20
[MAPREDUCE-5221] Reduce side Combiner is not used when using the new API - MapReduce - [issue]
...If a combiner is specified using o.a.h.mapreduce.Job.setCombinerClass - this will silently ignored on the reduce side since the reduce side usage is only aware of the old api combiner.This d...
http://issues.apache.org/jira/browse/MAPREDUCE-5221    Author: Siddharth Seth, 2014-04-13, 11:12
[MAPREDUCE-5821] IFile merge allocates new byte array for every value - MapReduce - [issue]
...I wrote a standalone benchmark of the MapOutputBuffer and found that it did a lot of allocations during the merge phase. After looking at an allocation profile, I found that IFile.Reader.nex...
http://issues.apache.org/jira/browse/MAPREDUCE-5821    Author: Todd Lipcon, 2014-04-12, 22:21
[MAPREDUCE-3418] If map output is not found, shuffle runs in tight loop - MapReduce - [issue]
...Sharad Agarwal bumped into this while simulating fetch failures. Removed the map output directory. Shuffle runs in tight loop throwing:2011-06-01 09:02:20,511 WARN org.apache.hadoop.mapreduc...
http://issues.apache.org/jira/browse/MAPREDUCE-3418    Author: John George, 2014-04-12, 19:23
[MAPREDUCE-5830] HostUtil.getTaskLogUrl is not backwards binary compatible with 2.3 - MapReduce - [issue]
...HostUtil.getTaskLogUrl used to have a signature like this in Hadoop 2.3.0 and earlier:public static String getTaskLogUrl(String taskTrackerHostName, String httpPort, String taskAttemptID)but...
http://issues.apache.org/jira/browse/MAPREDUCE-5830    Author: Jason Lowe, 2014-04-12, 18:41
mapreduce.framework.name <-- Where is the yarn service embedded? - MapReduce - [mail # dev]
...The mapred execution engine  is checked in the Cluster.java source, andeach Service implementation is scanned through and then selected based onthe match to the configuration property "...
   Author: Jay Vyas, 2014-04-12, 03:29
[MAPREDUCE-5822] FairScheduler does not preempt due to fairshare-starvation when fairshare is 1 - MapReduce - [issue]
...If the fair share returned by the scheduler getFairShare() == 1 the pool will never be marked as being starved because of the following calculation:boolean isStarvedForFairShare(PoolSchedula...
http://issues.apache.org/jira/browse/MAPREDUCE-5822    Author: Anubhav Dhoot, 2014-04-11, 22:53
[MAPREDUCE-3174] app master UI goes away when app finishes - not very user friendly - MapReduce - [issue]
...A user can go to the application master UI to see the stats on the app, but as soon as the app finishes that UI goes away and user is left with nothing.  A redirect to history server or...
http://issues.apache.org/jira/browse/MAPREDUCE-3174    Author: Thomas Graves, 2014-04-11, 20:42
Re: svn commit: r1586494 - in /hadoop/common/branches/branch-2/hadoop-mapreduce-project: ./ CHANGES.txt bin/ conf/ hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml hadoop-mapreduce-examples/ - MapReduce - [mail # dev]
...Hi Andrew,For merging a change, please merge only the sub-projects involved.  In particular, for merging a HDFS commit,  cd hadoop-hdfs-project/hadoop-hdfs and run the merge command there.  ...
   Author: Tsz Wo Sze, 2014-04-11, 18:29
[MAPREDUCE-5464] Add analogs of the SLOTS_MILLIS counters that jive with the YARN resource model - MapReduce - [issue]
...Per discussion on MAPREDUCE-5311, it would be good to have analogs for SLOTS_MILLIS that better fit the MR2 resource model....
http://issues.apache.org/jira/browse/MAPREDUCE-5464    Author: Sandy Ryza, 2014-04-11, 18:24
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