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[MAPREDUCE-3406] Add node information to bin/mapred job -list-attempt-ids and other improvements - MapReduce - [issue]
...From Ramya SunilProviding the NM information where the containers are scheduled in bin/mapred job -list-attempt-ids will be helpful in automation, debugging and to avoid grepping through the...
http://issues.apache.org/jira/browse/MAPREDUCE-3406    Author: Ravi Prakash, 2014-04-16, 16:26
Re: How / when does On-disk merge work? - MapReduce - [mail # user]
...Hi!  Tom White's "Hadoop: The Definitive Guide" is probably the best source for information on this (apart from the code itself ;-) Look at MergeManagerImpl.java btw in case you are so ...
   Author: Ravi Prakash, 2013-10-28, 14:15
Re: Reduce Merge Memtomem Parameter - MapReduce - [mail # user]
...Hi!  This parameter triggers a sort of fetched map outputs on the reducer node when the number of in memory map outputs > memToMemMergeOutputsThreshold . It is disabled by default. I...
   Author: Ravi Prakash, 2013-10-28, 14:02
Re: Trash in yarn - MapReduce - [mail # user]
...Hi Siddharth,  The Trash feature is enabled by setting "fs.trash.interval" . I'm not sure about your question on hive. What do you mean by the trash helping with dropped tables?   ...
   Author: Ravi Prakash, 2013-10-28, 13:38
[expand - 1 more] - Re: dynamically resizing the Hadoop cluster? - MapReduce - [mail # user]
...Hi Nan!  If the task trackers stop heartbeating back to the JobTracker, the JobTracker will mark them as dead and reschedule the tasks which were running on that TaskTracker. Admittedly...
   Author: Ravi Prakash, 2013-10-24, 20:51
Re: hadoop2.2.0 compile Failed - no such instruction - MapReduce - [mail # user]
...Hi Rico!  What was the command line you used to build?      On Wednesday, October 23, 2013 11:44 PM, codepeak  wrote:   Hi all,        I have a problem when com...
   Author: Ravi Prakash, 2013-10-24, 18:07
Re: Hadoop core jar class update - MapReduce - [mail # user]
...Viswanathan,  What version of Hadoop are you using? What is the change?      On Wednesday, October 23, 2013 2:20 PM, Viswanathan J  wrote:   Hi guys, If I updat...
   Author: Ravi Prakash, 2013-10-24, 17:55
Re: map container is assigned default memory size rather than user configured which will cause TaskAttempt failure - MapReduce - [mail # user]
...Manu!  This should not be the case. All tasks should have the configuration values you specified propagated to them. Are you sure your setup is correct? Are they always the same nodes w...
   Author: Ravi Prakash, 2013-10-23, 17:40
[expand - 1 more] - Re: ResourceManager webapp code runs OOM - MapReduce - [mail # user]
...Hi Prashant!  You're welcome. I believe for MR JHS it ought to be mapreduce.jobhistory.joblist.cache.size  HTH Ravi     On Tuesday, October 22, 2013 7:29 PM, Prashant Kom...
   Author: Ravi Prakash, 2013-10-23, 17:32
Re: issure about different heapsize on namenode and datanode - MapReduce - [mail # user]
...Hi!  You can go to the JMX page: http://:50070/jmx to find out what the Heap Memory and usage is. Yes we know that there is a problem in the scripts. I believe its being handled as part...
   Author: Ravi Prakash, 2013-10-18, 15:10
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB