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[expand - 1 more] - Re: Errors about MRunit - MapReduce - [mail # user]
...+ user@  Please do continue the conversation on the mailing list, in case others like you can benefit from / contribute to the discussion  Thanks Hemanth  On Sat, Apr 20, 2013...
   Author: Hemanth Yamijala, 2013-04-20, 12:04
[expand - 1 more] - Re: Create and write files on mounted HDFS via java api - MapReduce - [mail # user]
...Sorry - no. I just wanted to know if you were using FUSE, because I knew of no other way of mounting HDFS.. Basically was wondering if some libraries needed to be system path for the Java pr...
   Author: Hemanth Yamijala, 2013-04-20, 11:31
Re: jobtracker is stopping because of permissions - MapReduce - [mail # user]
.../mnt/san1 - owned by aye, hadmin and user mapred is trying to write to this directory. Can you look at your core-, hdfs- and mapred-site.xml to see where /mnt/san1 is configured as a value -...
   Author: Hemanth Yamijala, 2013-04-20, 10:02
Re: Run multiple HDFS instances - MapReduce - [mail # user]
...Are you trying to implement something like namespace federation, that's a part of Hadoop 2.0 - http://hadoop.apache.org/docs/r2.0.3-alpha/hadoop-project-dist/hadoop-hdfs/Federation.html &nbs...
   Author: Hemanth Yamijala, 2013-04-19, 04:01
[expand - 4 more] - Re: How to configure mapreduce archive size? - MapReduce - [mail # user]
...Well, since the DistributedCache is used by the tasktracker, you need to update the log4j configuration file used by the tasktracker daemon. And you need to get the tasktracker log file - fr...
   Author: Hemanth Yamijala, 2013-04-19, 03:54
Re: Copy Vs DistCP - MapReduce - [mail # user]
...AFAIK, the cp command works fully from the DFS client. It reads bytes from the InputStream created when the file is opened and writes the same to the OutputStream of the file. It does not wo...
   Author: Hemanth Yamijala, 2013-04-11, 07:40
[expand - 1 more] - Re: Child JVM memory allocation / Usage - MapReduce - [mail # user]
...Hmm. How are you loading the file into memory ? Is it some sort of memory mapping etc ? Are they being read as records ? Some details of the app will help   On Mon, Mar 25, 2013 at 2:14...
   Author: Hemanth Yamijala, 2013-03-25, 13:09
Re: About running a simple wordcount mapreduce - MapReduce - [mail # user]
...Which version of Hadoop are you using. A quick search shows me a bug https://issues.apache.org/jira/browse/HADOOP-5241 that seems to show similar symptoms. However, that was fixed a long whi...
   Author: Hemanth Yamijala, 2013-03-25, 06:11
Re: MapReduce Failed and Killed - MapReduce - [mail # user]
...Any MapReduce task needs to communicate with the tasktracker that launched it periodically in order to let the tasktracker know it is still alive and active. The time for which silence is to...
   Author: Hemanth Yamijala, 2013-03-25, 05:30
[expand - 2 more] - Re: map reduce and sync - MapReduce - [mail # user]
...I am using the same version of Hadoop as you.  Can you look at something like Scribe, which AFAIK fits the use case you describe.  Thanks Hemanth   On Sun, Feb 24, 2013 at 3:3...
   Author: Hemanth Yamijala, 2013-02-25, 01:31
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