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Re: Job running on YARN gets automatically killed after 10-12 minutes - MapReduce - [mail # user]
...Is this your custom application and not, say, MapReduce or the distributed shell?  If that is the case, the ApplicationMaster needs to constantly ping the ResourceManager so that RM can...
   Author: Vinod Kumar Vavilapalli, 2012-11-05, 18:47
[MAPREDUCE-4761] MR AM doesn't handle exceptions from RM correctly - MapReduce - [issue]
...The MR AM currently ignores exceptions upto a certain count irrespective of the failure type.Exception handling on the MR AM side is totally broken, it doesn't seem to shutdown the AM on get...
http://issues.apache.org/jira/browse/MAPREDUCE-4761    Author: Vinod Kumar Vavilapalli, 2012-11-01, 00:39
Re: Shoud I use MapReduce 0.2X, or 1.0? - MapReduce - [mail # user]
...There are two major release lines: 1.x and 2.x.  1.x is deemed stable and 2.x is considered alpha quality.  0.23.* is the last of 0.2X line. 0.23.* is used mostly by Yahoo! to &nbs...
   Author: Vinod Kumar Vavilapalli, 2012-10-31, 19:11
Re: task trackers - MapReduce - [mail # user]
...Even JT accepts exclude/include hosts files for the slaves. If they  aren't populated, JT by default accepts TTs that successfully register  with it at runtime.  Thanks, +Vino...
   Author: Vinod Kumar Vavilapalli, 2012-10-22, 18:03
Re: Java heap space error - MapReduce - [mail # user]
...Did this job ever run successfully for you? With 200m heap size?  Seems like your maps are failing. Can you paste your settings for the  following:  - io.sort.factor  - i...
   Author: Vinod Kumar Vavilapalli, 2012-10-22, 18:01
Re: speculative execution in yarn - MapReduce - [mail # user]
...Speculative execution is a per-job concept, so in 2.* release line, it  is MR AM's responsibility.  Because there is a two level scheduling - one at RM and one at AM, AMs  hav...
   Author: Vinod Kumar Vavilapalli, 2012-10-17, 18:28
Re: GroupingComparator - MapReduce - [mail # user]
...On Oct 15, 2012, at 12:27 PM, Dave Beech wrote:    Yes, it is a bit counter intuitive. In the older API, there is no way to  find out the current key corresponding to the curr...
   Author: Vinod Kumar Vavilapalli, 2012-10-16, 18:44
[expand - 1 more] - Re: DFS respond very slow - MapReduce - [mail # user]
...I just realized one more thing. You mentioned "disk is 700Gb RAID".  How  many disks overall? What RAID configuration? Usually we advocate JBOD  with hadoop to avoid performan...
   Author: Vinod Kumar Vavilapalli, 2012-10-16, 02:36
Re: Suitability of HDFS for live file store - MapReduce - [mail # user]
...For your original use case, HDFS indeed sounded like an overkill. But  once you start thinking of thumbnail generation, PDFs etc, MapReduce  obviously fits the bill.  If you w...
   Author: Vinod Kumar Vavilapalli, 2012-10-15, 23:25
Re: possible resource leak in capacity scheduler - MapReduce - [mail # user]
...Which version are you running? Can you enabled debug logging for RM and  see what's happening?  Thanks, +Vinod Kumar Vavilapalli Hortonworks Inc. http://hortonworks.com/  On O...
   Author: Vinod Kumar Vavilapalli, 2012-10-15, 23:13
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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