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[MAPREDUCE-5010] use multithreading to speed up mergeParts  and try MapPartitionsCompleteEvent to schedule fetch in reduce - MapReduce - [issue]
...use multithreading to speed up Merger and try MapPartitionsCompleteEvent to schedule fetch in reduce This is for muticore cpu, the performance will depend on your hardware and config.In mapt...
http://issues.apache.org/jira/browse/MAPREDUCE-5010    Author: Li Junjun, 2014-10-21, 02:16
[MAPREDUCE-6133] Rumen is not generating json for .hist file - MapReduce - [issue]
...Rumen is creating a blank json for .hist file.Please find below command that is being run :java -cp hadoop-2.4.1/share/hadoop/common/hadoop-common-2.4.1.jar:hadoop-2.4.1/share/hadoop/tools/l...
http://issues.apache.org/jira/browse/MAPREDUCE-6133    Author: ARPAN BHANDARI, 2014-10-21, 00:26
[MAPREDUCE-6108] ShuffleError OOM while reserving memory by MergeManagerImpl - MapReduce - [issue]
...Shuffle has OOM issue from time to time.  Such as this email reported.http://mail-archives.apache.org/mod_mbox/hadoop-mapreduce-dev/201408.mbox/%[EMAIL PROTECTED]%3E...
http://issues.apache.org/jira/browse/MAPREDUCE-6108    Author: Dongwook Kwon, 2014-10-20, 19:38
[MAPREDUCE-5911] Terasort TeraOutputFormat does not check for output directory existance - MapReduce - [issue]
...The enforcement that the directory must not yet exist is implemented in FileOutputFormat#checkOutputSpecs by throwing FileAlreadyExistsException.  However, terasort uses a specialized o...
http://issues.apache.org/jira/browse/MAPREDUCE-5911    Author: Ivan Mitic, 2014-10-20, 16:13
[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, 2014-10-20, 08:51
[MAPREDUCE-4879] TeraOutputFormat may overwrite an existing output directory - MapReduce - [issue]
...Unlike FileOutputFormat, TeraOutputFormat does not prevent TeraGen/Sort jobs from writing into an existing directory, and potentially overwriting previous runs....
http://issues.apache.org/jira/browse/MAPREDUCE-4879    Author: Gera Shegalov, 2014-10-20, 01:43
[expand - 22 more] - Re: Thinking ahead to hadoop-2.6 - MapReduce - [mail # dev]
...Thanks Arun for the info and reminder.Hi Alejandro,HADOOP-10895 is a blocker in the list Arun sent out and it's currentlyowned by you. I wonder whether you will have time to work on. If not,...
   Author: Yongjun Zhang, 2014-10-19, 18:36
[MAPREDUCE-5542] Killing a job just as it finishes can generate an NPE in client - MapReduce - [issue]
...If a client tries to kill a job just as the job is finishing then the client can crash with an NPE....
http://issues.apache.org/jira/browse/MAPREDUCE-5542    Author: Jason Lowe, 2014-10-18, 16:10
[MAPREDUCE-6132] Rumen unable to accept hdfs as scheme - MapReduce - [issue]
...while running,java -cp hadoop-2.4.1/share/hadoop/common/hadoop-common-2.4.1.jar:hadoop-2.4.1/share/hadoop/tools/lib/hadoop-rumen-2.4.1.jar:hadoop-2.4.1/share/hadoop/common/lib/commons-loggin...
http://issues.apache.org/jira/browse/MAPREDUCE-6132    Author: Mayank Mishra, 2014-10-18, 13:56
[MAPREDUCE-2841] Task level native optimization - MapReduce - [issue]
...I'm recently working on native optimization for MapTask based on JNI. The basic idea is that, add a NativeMapOutputCollector to handle k/v pairs emitted by mapper, therefore sort, spill, IFi...
http://issues.apache.org/jira/browse/MAPREDUCE-2841    Author: Binglin Chang, 2014-10-18, 05:09
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