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[MAPREDUCE-6160] Potential NullPointerException in MRClientProtocol interface implementation. - MapReduce - [issue]
...In the implementation of MRClientProtocol, many methods can throw NullPointerExceptions. Instead of NullPointerExceptions, better to throw IOException with proper message.In the HistoryClien...
http://issues.apache.org/jira/browse/MAPREDUCE-6160    Author: Rohith, 2014-11-25, 17:16
[MAPREDUCE-6173] Document the configuration of deploying MR over distributed cache with enabling wired encryption at the same time - MapReduce - [issue]
...Use the current documented configuration (specified in http://hadoop.apache.org/docs/stable/hadoop-mapreduce-client/hadoop-mapreduce-client-core/DistributedCacheDeploy.html) to work with the...
http://issues.apache.org/jira/browse/MAPREDUCE-6173    Author: Junping Du, 2014-11-25, 17:03
[MAPREDUCE-4421] Run MapReduce framework via the distributed cache - MapReduce - [issue]
...Currently MR AM depends on MR jars being deployed on all nodes via implicit dependency on YARN_APPLICATION_CLASSPATH. We should stop adding mapreduce jars to YARN_APPLICATION_CLASSPATH and, ...
http://issues.apache.org/jira/browse/MAPREDUCE-4421    Author: Arun C Murthy, 2014-11-25, 16:37
[MAPREDUCE-5831] Old MR client is not compatible with new MR application - MapReduce - [issue]
...Recently, we saw the following scenario:1. The user setup a cluster of hadoop 2.3., which contains YARN 2.3 and MR  2.3.2. The user client on a machine that MR 2.2 is installed and in t...
http://issues.apache.org/jira/browse/MAPREDUCE-5831    Author: Zhijie Shen, 2014-11-25, 15:16
issue when use MultipleOutputs - MapReduce - [mail # dev]
...hi,maillist:             i am a newbie for MR job coding, i want to ask a questionabout using MultipleOutputs, i plan to change my workcount code and outpu...
   Author: ch huang, 2014-11-25, 09:11
[MAPREDUCE-6144] DefaultSpeculator always add both MAP and REDUCE Speculative task even MAP_SPECULATIVE or REDUCE_SPECULATIVE is disabled. - MapReduce - [issue]
...DefaultSpeculator always add both MAP and REDUCE Speculative task even MAP_SPECULATIVE or REDUCE_SPECULATIVE is disabled.If both MAP_SPECULATIVE and REDUCE_SPECULATIVE are disabled, DefaultS...
http://issues.apache.org/jira/browse/MAPREDUCE-6144    Author: zhihai xu, 2014-11-25, 08:25
[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, 2014-11-24, 22:30
[MAPREDUCE-5429] App Master throw OutOfMemoryErrors. - MapReduce - [issue]
...While running job , got OOM in app master and exitted the app master jvm.2013-07-28 13:45:21,937 ERROR [IPC Server handler 14 on 59522] org.apache.hadoop.security.UserGroupInformation: Privi...
http://issues.apache.org/jira/browse/MAPREDUCE-5429    Author: Rohith, 2014-11-22, 10:41
[MAPREDUCE-6128] Automatic addition of bundled jars to distributed cache - MapReduce - [issue]
...On the client side, JDK adds Class-Path elements from the job jar manifeston the classpath. In theory there could be many bundled jars in many directories such that adding them manually via ...
http://issues.apache.org/jira/browse/MAPREDUCE-6128    Author: Gera Shegalov, 2014-11-21, 22:01
[MAPREDUCE-6169] MergeQueue should release reference to the current item from key and value at the end of the iteration to save memory. - MapReduce - [issue]
...MergeQueue should release reference to the current item from key and value at the end of the iteration to save memory.these buffers referenced by key and value can be large, which may cause ...
http://issues.apache.org/jira/browse/MAPREDUCE-6169    Author: zhihai xu, 2014-11-21, 15:44
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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