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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
Re: Job status shows 0's for counters - MapReduce - [mail # user]
...We've observed this internally too.  Shinichi, tx for the patch. Will follow up on JIRA to get it committed.  Thanks, +Vinod  On Sep 3, 2013, at 11:35 AM, Shinichi Yamashita w...
   Author: Vinod Kumar Vavilapalli, 2013-09-03, 19:13
[MAPREDUCE-113] [mapred] Job submission to an invalid queue should fail. - MapReduce - [issue]
...If ACLs are enabled, this case is handled, though not with a clear message to the user. Job submission to an invalid queue should be detected and dealt with. Irrespective of ACLs....
http://issues.apache.org/jira/browse/MAPREDUCE-113    Author: Vinod Kumar Vavilapalli, 2013-09-03, 10:19
[MAPREDUCE-102] NPE in tracker expiry thread. - MapReduce - [issue]
...I see NullPointerExceptions in Task Expiry thread of the JobTracker. Exception log in JT:2009-02-28 07:22:51,392 ERROR org.apache.hadoop.mapred.JobTracker: Tracker Expiry Thread got exceptio...
http://issues.apache.org/jira/browse/MAPREDUCE-102    Author: Vinod Kumar Vavilapalli, 2013-09-03, 08:32
[MAPREDUCE-3143] Complete aggregation of user-logs spit out by containers onto DFS - MapReduce - [issue]
...Already implemented the feature for handling user-logs spit out by containers in NodeManager. But the feature is currently disabled due to user-interface issues.This is the umbrella ticket f...
http://issues.apache.org/jira/browse/MAPREDUCE-3143    Author: Vinod Kumar Vavilapalli, 2013-09-02, 00:28
Re: hadoop-2.1.1-beta & hadoop-2.2.0 (GA) - MapReduce - [mail # dev]
...Looking at the blockers, MAPREDUCE and YARN at least, looks like we'll need a week or two.  A branch 2.1.1 would mean commits to 4 branches. Assuming everyone is only committing blocker...
   Author: Vinod Kumar Vavilapalli, 2013-08-30, 23:09
Re: Hadoop Yarn - MapReduce - [mail # user]
...You'll have to change the MapReduce code. What options are you exactly looking for and why should they be only applied on some nodes? Some kind of sampling?  More details can help us he...
   Author: Vinod Kumar Vavilapalli, 2013-08-29, 22:37
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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