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[MAPREDUCE-5288] ResourceEstimator#getEstimatedTotalMapOutputSize suffers from divide by zero issues - MapReduce - [issue]
...The computation in the above mentioned class-method is below:      long estimate = Math.round(((double)inputSize *           completedMapsOu...
http://issues.apache.org/jira/browse/MAPREDUCE-5288    Author: Harsh J, 2013-07-24, 23:26
Re: setting mapred.task.timeout programmatically from client - MapReduce - [mail # user]
...Yes, you can set it into your Job configuration object in code. If your driver uses the Tool framework, then you can also pass a -Dmapred.task.timeout=value CLI argument when invoking your p...
   Author: Harsh J, 2013-07-23, 03:15
[expand - 1 more] - Re: Namenode automatically going to safemode with 2.1.0-beta - MapReduce - [mail # user]
...Yeah I believe your /tmp was probably misbehaving somehow (running out of space or otherwise). You could log a JIRA for the "null" seen in the log though, it shouldn't have done that and sho...
   Author: Harsh J, 2013-07-20, 00:50
Re: Make job output be a comma separated file - MapReduce - [mail # user]
...Its hard to tell for sure from that snippet if you're altering the actual job configuration or a new, disconnected configuration object. You need to do the former to have it apply.  On ...
   Author: Harsh J, 2013-07-19, 02:11
Re: HDFS blockIDs vs paths - MapReduce - [mail # user]
...DataNodes track it. See and trace the volumeMap, https://github.com/apache/hadoop-common/blob/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdat...
   Author: Harsh J, 2013-07-19, 02:09
Re: Fault tolerance and Speculative Execution - MapReduce - [mail # user]
...What you describe in the first paragraph is not true.  Speculative execution API toggles are listed in the documentation: http://hadoop.apache.org/docs/stable/mapred_tutorial.html#Job+C...
   Author: Harsh J, 2013-07-18, 17:10
Re: QJM for federation - MapReduce - [mail # user]
...This has been asked previously. Use suffixes to solve your issue. See http://search-hadoop.com/m/Fingkg6Dk91  On Wed, Jul 17, 2013 at 1:33 PM, lei liu  wrote:    Harsh J...
   Author: Harsh J, 2013-07-17, 08:08
Re: Running example programs on YARN - MapReduce - [mail # user]
...The MR (MR2) application would reside in the project/jar called hadoop-mapreduce-client-app-*.jar. In a tarball, this would be at $HADOOP_PREFIX/share/hadoop/mapreduce/  On Mon, Jul 15,...
   Author: Harsh J, 2013-07-15, 02:34
Re: Hadoop property precedence - MapReduce - [mail # user]
...Replication, block size, etc. are all per-file and pure client supplied properties. They either take their default from the client config, or directly from an API argument override.  On...
   Author: Harsh J, 2013-07-14, 10:54
Re: how to add JournalNodes - MapReduce - [mail # user]
...You need to restart your NameNodes to get them to use the new QJM 5-host-set configs, and I think you can do that without downtime if you're already in HA mode by restarting one NN at a time...
   Author: Harsh J, 2013-07-12, 08:08
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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