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Re: Hook for Mapper kill - MapReduce - [mail # user]
...There isn't anything in the API as such. You could register your own JVM shut-down hook which does it.  OTOH, if you are running this on Linux and a setsid binary is available, Hadoop i...
   Author: Vinod Kumar Vavilapalli, 2013-10-18, 17:39
Re: [VOTE] Release Apache Hadoop 2.2.0 - MapReduce - [mail # dev]
...Ran through my usual check-list.  - Signatures and message digests all good.  - The top level full LICENSE, NOTICE and README files look fine.  - CHANGES.txt for common, hdfs,...
   Author: Vinod Kumar Vavilapalli, 2013-10-13, 17:37
[MAPREDUCE-5567] [Umbrella] Stabilize MR framework w.r.t ResourceManager restart - MapReduce - [issue]
...There are a bunch of tickets tracking MR AM's issues w.r.t RM restart. Consolidating them here so that we don't make contradictory fixes accross JIRAs....
http://issues.apache.org/jira/browse/MAPREDUCE-5567    Author: Vinod Kumar Vavilapalli, 2013-10-05, 23:32
Re: 2.1.2 (Was: Re: [VOTE] Release Apache Hadoop 2.1.1-beta) - MapReduce - [mail # dev]
...+1. We should get an RC as soon as possible so that we can get all the downstream components to sign off. The earlier the better.  Thanks, +Vinod  On Oct 1, 2013, at 4:15 PM, Arun ...
   Author: Vinod Kumar Vavilapalli, 2013-10-02, 00:15
[MAPREDUCE-5548] JobHIstoryServer should let queue admins view info of corresponding apps - MapReduce - [issue]
...YARN-899 added the basic support for queue acls. JHS 'somehow' should let queue admins view info about all apps under that queue.We should also tests to validate that app-acls work at JHS....
http://issues.apache.org/jira/browse/MAPREDUCE-5548    Author: Vinod Kumar Vavilapalli, 2013-09-29, 09:04
Re: [VOTE] Release Apache Hadoop 2.1.1-beta - MapReduce - [mail # dev]
...I ran through my usual check-list for validating the RC. I only checked the source tarball.  - Signatures and message digests all good. I guess because of differences in gpg2's version,...
   Author: Vinod Kumar Vavilapalli, 2013-09-24, 22:25
Re: Tasktracker Permission Issue? - MapReduce - [mail # user]
...What is your config set to for mapred local dirs? And what are the permissions to those directories?  All users need executable permissions in all the paths up to the local-dir so that ...
   Author: Vinod Kumar Vavilapalli, 2013-09-18, 17:26
Re: Resource limits with Hadoop and JVM - MapReduce - [mail # user]
...I assume you are on Linux. Also assuming that your tasks are so resource intensive that they are taking down nodes. You should enable limits per task, see http://hadoop.apache.org/docs/stabl...
   Author: Vinod Kumar Vavilapalli, 2013-09-16, 21:04
Re: chaining (the output of) jobs/ reducers - MapReduce - [mail # user]
...Other than the short term solutions that others have proposed, Apache Tez solves this exact problem. It can M-M-R-R-R chains, and mult-way mappers and reducers, and your own custom processor...
   Author: Vinod Kumar Vavilapalli, 2013-09-13, 04:26
Re: hadoop1.2.1 speedup model - MapReduce - [mail # dev]
...Clearly your input size isn't changing. And depending on how they are distributed on the nodes, there could be Datanode/disks contention.  The better way to model this is by scaling the...
   Author: Vinod Kumar Vavilapalli, 2013-09-07, 07:38
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