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Re: new to hadoop and first question - MapReduce - [mail # user]
...You are pointing your JobClient to the Namenode. Check your mapred.job.tracker address and make sure it points to the correct JobTracker node.  Also 0.14 is very very old. Please use 1....
   Author: Vinod Kumar Vavilapalli, 2013-01-07, 09:50
Re: INFO org.apache.hadoop.mapred.TaskTracker: attempt_XXXX NaN% - MapReduce - [mail # dev]
...The NaN is very suspicious, perhaps a bug - will need more information  But irrespective, are you sending periodic updates from your map/reduce code? The framework has the 10 minute tim...
   Author: Vinod Kumar Vavilapalli, 2012-12-26, 19:21
Re: Yarn question: All tasks fail without useful diagnose info when running Yarn - MapReduce - [mail # user]
...Can you check AM logs at http://centos-3.localdomain:8088/proxy/application_1354775970476_0001/ ? The ApplicationMaster's syslog/stderr can tell you what happened.  Most likely a setup ...
   Author: Vinod Kumar Vavilapalli, 2012-12-18, 05:42
Re: hadoop task assigner - MapReduce - [mail # user]
...In 1.0 line, you should look at JobTracker side, specifically JobInProgress.java.  Thanks, +Vinod  On Dec 7, 2012, at 8:28 AM, Jay Vyas wrote:  ...
   Author: Vinod Kumar Vavilapalli, 2012-12-07, 21:06
Re: Straggler map tasks - MapReduce - [mail # dev]
...Yes, you should look at JobInProgress class, and search for 'speculative'. JobTracker already has logic to launch speculative copies for tasks which are progressing at a degraded rate relati...
   Author: Vinod Kumar Vavilapalli, 2012-11-26, 18:40
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
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