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Re: User level permission - MapReduce - [mail # user]
...Can you please share the configuration in hdfs-site.xml,core-site.xml  file along with NN and DN logs.?  Also please check the permission at fs.data.dir location.  Thanks On T...
   Author: Jitendra Yadav, 2013-08-15, 15:46
[expand - 1 more] - Re: mapper and reducer task failure - MapReduce - [mail # user]
...Two things you can validate.  1. Check the directory permission on your DN side, because there is some issue while creating symbolic link.  2. Check the allocated memory at DN side...
   Author: Jitendra Yadav, 2013-08-15, 15:23
Re: when Standby Namenode is doing checkpoint, the Active NameNode is slow. - MapReduce - [mail # user]
...Hi, Looks like you got some pace, did you also tried with compression parameter? I think you will get more optimization with it. Also file transfer speed depends on our network bandwidth bet...
   Author: Jitendra Yadav, 2013-08-15, 14:09
Re: Discrepancy in the values of consumed disk space by hadoop - MapReduce - [mail # user]
...Hi,  I think you are referring DFS Used (from NameNode report) and Total size (from fsck) values right?.  *DFS Used:* This contains the total hdfs space used on all the connected d...
   Author: Jitendra Yadav, 2013-08-11, 20:01
[expand - 2 more] - Re: getting errors on datanode/tasktracker logs - MapReduce - [mail # user]
...hi Jagat,  we have hdfs cluster in production running on java 1.6 without any issue but on different Hadoop version.  I'm bit confused about this issue in our test env. Is this an ...
   Author: Jitendra Yadav, 2013-08-10, 08:24
Re: Hadoop upgrade - MapReduce - [mail # user]
...Please refer Hadoop 1.1.2 release notes.  http://hadoop.apache.org/docs/r1.1.2/releasenotes.html  On Fri, Aug 9, 2013 at 5:41 PM, Viswanathan J wrote:  ...
   Author: Jitendra Yadav, 2013-08-09, 12:57
[expand - 1 more] - Re: Datanode doesn't connect to Namenode - MapReduce - [mail # user]
...Your hdfs name entry should be same on master and databnodes  * fs.default.name* *hdfs://cloud6:54310*  Thanks On Wed, Aug 7, 2013 at 11:05 PM, Felipe Gutierrez  wrote:  ...
   Author: Jitendra Yadav, 2013-08-07, 18:03
Re: Oozie ssh action error - MapReduce - [mail # user]
...Hi,  I hope below points might help you.   *Approach 1#*  You need to change the sshd_config file in the remote server (probably in /etc/ssh/sshd_config).  Change Passwor...
   Author: Jitendra Yadav, 2013-08-07, 14:02
Re: Namenode is failing with expception to join - MapReduce - [mail # user]
...Hi,  Did you configured your Name Node to store multiple copies of its metadata?.  You can recover your name node in that situation.  #hadoop namenode -recover  it will a...
   Author: Jitendra Yadav, 2013-08-07, 08:30
Re: Many Standby NameNodes for QJM HA - MapReduce - [mail # user]
...May be I'm wrong but I think right now there is only one standby NN facility available.  Thanks On Thu, Aug 1, 2013 at 2:01 PM, lei liu  wrote:  ...
   Author: Jitendra Yadav, 2013-08-01, 09:15
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