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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, 2014-11-24, 15:47
[MAPREDUCE-6166] Reducers do not catch bad map output transfers during shuffle if data shuffled directly to disk - MapReduce - [issue]
...In very large map/reduce jobs (50000 maps, 2500 reducers), the intermediate map partition output gets corrupted on disk on the map side. If this corrupted map output is too large to shuffle ...
http://issues.apache.org/jira/browse/MAPREDUCE-6166    Author: Eric Payne, 2014-11-24, 14:18
[MAPREDUCE-6171] The visibilities of the distributed cache files and archives should be determined by both their permissions and if they are located in HDFS encryption zone - MapReduce - [issue]
...The visibilities of the distributed cache files and archives are currently determined by the permission of these files or archives. The following is the logic of method isPublic() in class C...
http://issues.apache.org/jira/browse/MAPREDUCE-6171    Author: Dian Fu, 2014-11-24, 10:22
[MAPREDUCE-5785] Derive heap size or mapreduce.*.memory.mb automatically - MapReduce - [issue]
...Currently users have to set 2 memory-related configs per Job / per task type.  One first chooses some container size map reduce.*.memory.mb and then a corresponding maximum Java hea...
http://issues.apache.org/jira/browse/MAPREDUCE-5785    Author: Gera Shegalov, 2014-11-24, 06:32
[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, 2014-11-22, 22:23
[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-5568] JHS returns invalid string for reducer completion percentage if AM restarts with 0 reducer. - MapReduce - [issue]
...JobCLient shows like:13/10/05 16:26:09 INFO mapreduce.Job:  map 100% reduce NaN%13/10/05 16:26:09 INFO mapreduce.Job: Job job_1381015536254_0001 completed successfully13/10/05 16:26:09 ...
http://issues.apache.org/jira/browse/MAPREDUCE-5568    Author: Jian He, 2014-11-22, 02:16
[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-5932] Provide an option to use a dedicated reduce-side shuffle log - MapReduce - [issue]
...For reducers in large jobs our users cannot easily spot portions of the log associated with problems with their code. An example reducer with INFO-level logging generates ~3500 lines / ~700K...
http://issues.apache.org/jira/browse/MAPREDUCE-5932    Author: Gera Shegalov, 2014-11-21, 16:18
[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