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Re: Understanding of the hadoop distribution system (tuning) - MapReduce - [mail # user]
...Hi,  Responses inline to some points.  On Tue, Sep 11, 2012 at 7:26 AM, Elaine Gan  wrote:   These two configurations essentially tell the tasktrackers that they can run ...
   Author: Hemanth Yamijala, 2012-09-11, 04:19
Re: Log aggregation in Yarn - MapReduce - [mail # user]
...Hi,  I figured out what the issue is.  I'd configured my yarn.nodemanager.remote-app-log-dir to be ${yarn.log.dir}/logs. This doesn't per se make sense because this is a remote loc...
   Author: Hemanth Yamijala, 2012-09-10, 13:38
Re: Reading from HDFS from inside the mapper - MapReduce - [mail # user]
...Hi,  You could check DistributedCache ( http://hadoop.apache.org/common/docs/stable/mapred_tutorial.html#DistributedCache). It would allow you to distribute data to the nodes where your...
   Author: Hemanth Yamijala, 2012-09-10, 10:06
Re: [Cosmos-dev] Out of memory in identity mapper? - MapReduce - [mail # user]
...Harsh,  Could IsolationRunner be used here. I'd put up a patch for HADOOP-8765, after applying which IsolationRunner works for me. Maybe we could use it to re-run the map task that's fa...
   Author: Hemanth Yamijala, 2012-09-07, 03:49
Re: Is there a way to get notificaiton when the job is failed? - MapReduce - [mail # user]
...Hi Rajiv,  Thanks for the heads-up ....  Looking at the JIRA, the gist is that with Hadoop 1.x, a badly configured job (like with short retry interval and/or large number of retrie...
   Author: Hemanth Yamijala, 2012-09-06, 12:05
Yarn defaults for local directories - MapReduce - [mail # user]
...Hi,  Is there a reason why Yarn's directory paths are not defaulting to be relative to hadoop.tmp.dir.  For e.g. yarn.nodemanager.local-dirs defaults to /tmp/nm-local-dir. Could it...
   Author: Hemanth Yamijala, 2012-09-03, 12:09
Re: custom format - MapReduce - [mail # user]
...Hi,  I found this while trying to see if such a FileFormat or Split already exists: http://bitsofinfo.wordpress.com/2009/11/01/reading-fixed-length-width-input-record-reader-with-hadoop...
   Author: Hemanth Yamijala, 2012-09-03, 11:27
Re: Integrating hadoop with java UI application deployed on tomcat - MapReduce - [mail # user]
...Hi,  If you are getting the LocalFileSystem, you could try by putting core-site.xml in a directory that's there in the classpath for the Tomcat App (or include such a path in the classp...
   Author: Hemanth Yamijala, 2012-09-03, 10:41
Re: Hadoop in Pseudo-Distributed mode on Mac OS X 10.8 - MapReduce - [mail # user]
...The mapred.local.dir is local directories on the file system of slave nodes. In pseudo distributed mode, this would be your own machine. If you've specified any configuration for it, it shou...
   Author: Hemanth Yamijala, 2012-08-31, 04:20
Re: Job does not run with EOFException - MapReduce - [mail # user]
...Maybe you have already done this, in which please ignore the suggestion. Can you run hadoop version using the hadoop script from the same location which is running the JobTracker and the cli...
   Author: Hemanth Yamijala, 2012-08-29, 09:18
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