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[expand - 1 more] - Re: 0.22 Release and Security - MapReduce - [mail # user]
...Joey,  1) if(!conf.get(HADOOP_SECURITY_AUTHENTICATION).equals("kerberos"))       throw new RuntimeException("Cannot start secure datanode in unsecure cluster");  The...
   Author: Praveen Sripati, 2011-12-29, 15:37
Kerberos service token vs Service ticket - MapReduce - [mail # dev]
...Hi,  According to the `Hadoop : The Definitive Guide`  and can be thought of as a shared secret between the client and the server. On the first RPC call to the NameNode, the client...
   Author: Praveen Sripati, 2011-12-28, 16:55
Re: External libraries usage - MapReduce - [mail # user]
...Check this article from Cloudera on different ways of distributing a jar file to the job.  http://www.cloudera.com/blog/2011/01/how-to-include-third-party-libraries-in-your-map-reduce-j...
   Author: Praveen Sripati, 2011-12-28, 11:35
Re: how does Hadoop Yarn support different programming models? - MapReduce - [mail # user]
...Bing,  FYI ... here are some applications ported to YARN.  http://wiki.apache.org/hadoop/PoweredByYarn  Praveen  On Tue, Dec 27, 2011 at 5:27 AM, Mahadev Konar wrote: &nb...
   Author: Praveen Sripati, 2011-12-27, 02:42
[expand - 1 more] - Re: Limiting the usage of counters - MapReduce - [mail # dev]
...Hi,  I found out the following in MRJobConfig.java in 0.23 and trunk and missing in 0.22. The configuration parameters have been changed between 0.20.* to 0.23/trunk and so initially co...
   Author: Praveen Sripati, 2011-12-25, 11:25
Mapping between the JIRA and files changed - MapReduce - [mail # dev]
...Hi,  How do I know the code changed with a particular JIRA? If I go to MAPREDUCE-1943, there are multiple patch attachments. Should I go with the date and pick the latest patch?  I...
   Author: Praveen Sripati, 2011-12-23, 16:44
[expand - 2 more] - Re: ResourceManager not getting started in 0.23 - solved - MapReduce - [mail # dev]
...Patrick,  Thanks for the help.  The historyserver was looking for the hdfs jar files, so I had to add a similar section for hdfs also in the yarn script. Now all the process start ...
   Author: Praveen Sripati, 2011-12-22, 14:21
[expand - 1 more] - Re: how to access a mapper counter in reducer - MapReduce - [mail # user]
...Robert,  I will take a shot at it. I think it would be about writing a custom comparator and a partitioner, reading some config parameters and sending the counters as key/value pairs to...
   Author: Praveen Sripati, 2011-12-10, 03:00
Re: Which Hadoop version has Adaptive scheduler ? - MapReduce - [mail # user]
...The resolution of the JIRA says unresolved, so it's not yet in any of the release. Best bet is to download the patch attached with the JIRA and see the code changes if interested.  Rega...
   Author: Praveen Sripati, 2011-12-07, 17:27
[expand - 3 more] - Re: Incremental builds in 0.23 using Maven - MapReduce - [mail # dev]
...Alejandro,  Here is the command I use for branch-0.23  mvn clean install package -Pdist -Dtar -DskipTests -Dmaven.javadoc.skip=true  Regards, Praveen  On Wed, Dec 7, 2011...
   Author: Praveen Sripati, 2011-12-07, 13:07
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