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Re: Trouble in running MapReduce application - MapReduce - [mail # user]
...Can you try this ? Pick a class like WordCount from your package and execute this command:  javap -classpath  -verbose org.myorg.Wordcount | grep version.  For e.g. here's wha...
   Author: Hemanth Yamijala, 2013-02-23, 13:05
Re: OutOfMemoryError during reduce shuffle - MapReduce - [mail # user]
...There are a few tweaks In configuration that may help. Can you please look at http://hadoop.apache.org/docs/r1.0.4/mapred_tutorial.html#Shuffle%2FReduce+Parameters  Also, since you have...
   Author: Hemanth Yamijala, 2013-02-21, 01:41
Re: ClassNotFoundException in Main - MapReduce - [mail # user]
...Thats because the error is not related to the packaging. As mentioned in my last mail, downgrade the java version used for compiling your code from Jdk 7 to Jdk 6. If you are using an IDE, i...
   Author: Hemanth Yamijala, 2013-02-19, 17:05
Re: Database insertion by HAdoop - MapReduce - [mail # user]
...Sqoop can be used to export as well.  Thanks Hemanth  On Tuesday, February 19, 2013, Masoud wrote:  ...
   Author: Hemanth Yamijala, 2013-02-19, 15:52
Re: How to understand DataNode usages ? - MapReduce - [mail # user]
...This seems to be related to the % used capacity at a datanode. The values are computed for all the live datanodes, and the range / central limits / deviations are computed based on a sorted ...
   Author: Hemanth Yamijala, 2013-02-15, 04:10
Re: Java submit job to remote server - MapReduce - [mail # user]
...Can you please include the complete stack trace and not just the root. Also, have you set fs.default.name to a hdfs location like hdfs://localhost:9000 ?  Thanks Hemanth  On Wednes...
   Author: Hemanth Yamijala, 2013-02-13, 01:16
Re: Cannot use env variables in "hodrc" - MapReduce - [mail # user]
...Hi,  Hadoop On Demand is no longer supported with recent releases of Hadoop. There is no separate user list for HOD related questions.  Which version of Hadoop are you using right ...
   Author: Hemanth Yamijala, 2013-02-08, 08:01
Re: Filesystem closed exception - MapReduce - [mail # user]
...FS Caching is enabled on the cluster (i.e. the default is not changed).  Our code isn't actually mapper code, but a standalone java program being run as part of Oozie. It just seemed co...
   Author: Hemanth Yamijala, 2013-01-31, 04:28
Re: How to find Blacklisted Nodes via cli. - MapReduce - [mail # user]
...Hi,  Part answer: you can get the blacklisted tasktrackers using the command line:  mapred job -list-blacklisted-trackers.  Also, I think that a blacklisted tasktracker become...
   Author: Hemanth Yamijala, 2013-01-31, 04:25
Re: TT nodes distributed cache failure - MapReduce - [mail # user]
...Could you post the stack trace from the job logs. Also looking at the task tracker logs on the failed nodes may help.  Thanks Hemanth  On Friday, January 25, 2013, Terry Healy wrot...
   Author: Hemanth Yamijala, 2013-01-26, 07:25
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