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[MAPREDUCE-6626] Reuse objectMapper instance in MapReduce - MapReduce - [issue]
...Now in MapReduce, there are some places creating a new ObjectMapper instance every time. In wiki of ObjectMapper, it suggested:Further: it is beneficial to use just one instance (or small nu...
http://issues.apache.org/jira/browse/MAPREDUCE-6626    Author: Lin Yiqun, 2016-02-08, 08:46
[MAPREDUCE-6579] Test failure : TestNetworkedJob - MapReduce - [issue]
...From https://builds.apache.org/job/PreCommit-YARN-Build/9976/artifact/patchprocess/patch-unit-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-jobclient-jdk1.8.0_66.t...
http://issues.apache.org/jira/browse/MAPREDUCE-6579    Author: Rohith Sharma K S, 2016-02-08, 05:58
[MAPREDUCE-6628] Potential memory leak in CryptoOutputStream - MapReduce - [issue]
...There is a potential memory leak in CryptoOutputStream.java.  It allocates two direct byte buffers (inBuffer and outBuffer) that get freed when close() method is called.  Most of t...
http://issues.apache.org/jira/browse/MAPREDUCE-6628    Author: Mariappan Asokan, 2016-02-07, 20:08
[MAPREDUCE-6608] Work Preserving AM Restart for MapReduce - MapReduce - [issue]
...Providing a framework for work preserving AM is achieved in YARN-1489.  We would like to take advantage of this for MapReduce(MR) applications.  There are some challenges which hav...
http://issues.apache.org/jira/browse/MAPREDUCE-6608    Author: Srikanth Sampath, 2016-02-07, 14:58
[MAPREDUCE-6110] JobHistoryServer CLI throws NullPointerException with job ids that do not exist - MapReduce - [issue]
...When using JobHistoryServer CLI to query a job id that does not exist on the server, it may throw NullPointerException sometimes. I tried "mapred job -events <some_wrong_jobId> 0 100",...
http://issues.apache.org/jira/browse/MAPREDUCE-6110    Author: Li Lu, 2016-02-05, 23:43
[MAPREDUCE-6607] .staging dir is not cleaned up if mapreduce.task.files.preserve.failedtask or mapreduce.task.files.preserve.filepattern are set - MapReduce - [issue]
...if either of the following configs are set, then .staging dir is not cleaned up: mapreduce.task.files.preserve.failedtask mapreduce.task.files.preserve.filepatternThe former was supposed to ...
http://issues.apache.org/jira/browse/MAPREDUCE-6607    Author: Maysam Yabandeh, 2016-02-05, 22:00
[MAPREDUCE-6424] Store MR counters as timeline metrics instead of event - MapReduce - [issue]
...In MAPREDUCE-6327, we make map/reduce counters get encoded from JobFinishedEvent as timeline events with counters details in JSON format. We need to store framework specific counters as metr...
http://issues.apache.org/jira/browse/MAPREDUCE-6424    Author: Junping Du, 2016-02-05, 19:25
[MAPREDUCE-6627] Add machine-readable output to mapred job -history command - MapReduce - [issue]
...It would be great if we could add a machine-readable output format, say JSON, to the mapred job -history [all] <jobHistoryFile> command so that it's easier for programs to consume that...
http://issues.apache.org/jira/browse/MAPREDUCE-6627    Author: Robert Kanter, 2016-02-05, 04:42
[MAPREDUCE-6566] Add retry support to mapreduce CLI tool - MapReduce - [issue]
...MAPREDUCE-6251 added support for retries to JobClient. However the MR CLI class doesn't use the JobClient. It would be useful to add support for retries to the CLI class as well....
http://issues.apache.org/jira/browse/MAPREDUCE-6566    Author: Varun Vasudev, 2016-02-05, 00:31
[MAPREDUCE-6507] MiniYARNCluster.start() returns before cluster is completely started - MapReduce - [issue]
...TestRMNMInfo fails intermittently. Below is trace for the failuretestRMNMInfo(org.apache.hadoop.mapreduce.v2.TestRMNMInfo)  Time elapsed: 0.28 sec  <<< FAILURE!java.lang.A...
http://issues.apache.org/jira/browse/MAPREDUCE-6507    Author: Rohith Sharma K S, 2016-02-04, 22:33
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