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Re: issue launching mapreduce job with kerberos secured hadoop - MapReduce - [mail # user]
...Hi Neeraj, This error doesn't look to be kerberos related initially. Can you verify if 192.168.49.51 has the tasktracker process running?  Regards, Robert   On Tue, May 28, 2013 at...
   Author: Robert Molina, 2013-05-30, 02:48
Re: How to identify datanodes in a cluster - MapReduce - [mail # user]
...Hi Savitha, On your nodes running tasktrackers and datanodes, there is a core-site.xml file that specifies the namenode to contact via the property fs.default.name. In addition, there is a m...
   Author: Robert Molina, 2013-02-14, 20:36
Re: Can I switch the IP/host of NN without losing the filesystem? - MapReduce - [mail # user]
...Hi James, This should be fine, but just wanted to add that you will need to also make the change on your other nodes within the cluster, so they know how to contact the filesystem.  Reg...
   Author: Robert Molina, 2013-01-07, 20:49
Re: jobtracker page @50030 timeout or take very long time. - MapReduce - [mail # user]
...Hi Patai, Have you looked into verifying if it is network related, maybe see what the ping responses are to that node?   On Thu, Nov 1, 2012 at 1:47 PM, Patai Sangbutsarakum  wrote...
   Author: Robert Molina, 2012-11-01, 21:31
Re: NameNode uses up (almost) all ports - MapReduce - [mail # user]
...Hi James, Since it seems intermittent, have you verified if there are any maintenance type procedures being done within the namenode machine or it's related network?    On Sun, Oct...
   Author: Robert Molina, 2012-10-31, 18:41
Re: ERROR:: TaskTracker is not STARTING.. - MapReduce - [mail # user]
...Hi Yogesh, For the task tracker node that is having the issue, is the ip address 10.209.135.24? What's the localhost mapped to within that machines etc/hosts file?     On Fri, Oct ...
   Author: Robert Molina, 2012-10-31, 01:20
[expand - 1 more] - Re: Redirects from namenode to datanode not working - MapReduce - [mail # user]
...Hi Visioner, Actually if you can access the web interface for the remote datanode via ip from your local machine, then you just probably need to put a host entry within your local machine so...
   Author: Robert Molina, 2012-10-31, 00:04
Re: hadoop 1.0.3 configurations - MapReduce - [mail # user]
...The property that you wil need to set is dfs.datanode.data.dir.  This property is mentioned in hdfs-site.xml.   On Mon, Oct 15, 2012 at 1:09 AM, Adrian Acosta Mitjans  wrote: ...
   Author: Robert Molina, 2012-10-20, 00:25
Re: 0.22.0 version - MapReduce - [mail # user]
...I believe not many folks have deployed it.  Although some testing has been done it may not be stable.  If you are really stuck on using that release, you can check on the release n...
   Author: Robert Molina, 2012-10-11, 01:20
Re: copyFromLocal - MapReduce - [mail # user]
...Here is the information for webhdfs rest call that should allow you to upload a file: http://hadoop.apache.org/docs/r1.0.3/webhdfs.html#CREATE  HTH  On Fri, Oct 5, 2012 at 1:16 AM,...
   Author: Robert Molina, 2012-10-10, 00:19
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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