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Re: warnings from log4j -- where to look to resolve? - MapReduce - [mail # user]
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...Try passing -Dlog4j.debug via mapred.child.java.opts. That will clearly show you the problem as part of logs itself. Are these errors appearing in stdout/stderr or syslog? +Vinod...
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Author: Vinod Kumar Vavilapalli,
2013-01-29, 02:13
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Re: number of mapper tasks - MapReduce - [mail # user]
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...Regarding your original question, you can use the min and max split settings to control the number of maps: http://hadoop.apache.org/docs/stable/api/org/apache/hadoop/mapreduce/lib/input/Fil...
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Author: Vinod Kumar Vavilapalli,
2013-01-29, 02:08
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Re: core-site.xml file is being ignored by new Configuration() - MapReduce - [mail # user]
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...Can you try prepending the path with file:// or pass in a URL and use the method which takes in a URL? I remember class loading issues with paths without the file: scheme info from a d...
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Author: Vinod Kumar Vavilapalli,
2013-01-29, 01:58
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Re: Capacity Scheduler questions - MapReduce - [mail # user]
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... Single job in the whole cluster for the user or a shared queue? For a specific user or for every user? Handling specific users should be via special queues. If you want it ...
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Author: Vinod Kumar Vavilapalli,
2013-01-08, 02:08
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Re: new to hadoop and first question - MapReduce - [mail # user]
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...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....
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Author: Vinod Kumar Vavilapalli,
2013-01-07, 09:50
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Re: INFO org.apache.hadoop.mapred.TaskTracker: attempt_XXXX NaN% - MapReduce - [mail # dev]
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...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...
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Author: Vinod Kumar Vavilapalli,
2012-12-26, 19:21
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Re: Yarn question: All tasks fail without useful diagnose info when running Yarn - MapReduce - [mail # user]
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...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 ...
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Author: Vinod Kumar Vavilapalli,
2012-12-18, 05:42
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Re: hadoop task assigner - MapReduce - [mail # user]
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...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: ...
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Author: Vinod Kumar Vavilapalli,
2012-12-07, 21:06
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Re: Straggler map tasks - MapReduce - [mail # dev]
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...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...
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Author: Vinod Kumar Vavilapalli,
2012-11-26, 18:40
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Re: Job running on YARN gets automatically killed after 10-12 minutes - MapReduce - [mail # user]
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...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...
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Author: Vinod Kumar Vavilapalli,
2012-11-05, 18:47
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