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Re: Json Parsing in map reduce. - Hadoop - [mail # user]
...The reason is that the Json parsing code is in a 3rd party library which isnot included in the default  map reduce/hadoop distribution. You have toadd them in your classpath at *runtime...
   Author: Shahab Yunus, 2015-04-30, 17:19
Re: Connection Refused error on Hadoop-2.6.0 on Ubuntu 14.10 desktop running Pseudo Mode - Hadoop - [mail # user]
...Can you try sudo?https://www.linux.com/learn/tutorials/306766:linux-101-introduction-to-sudoRegards,ShahabOn Wed, Apr 22, 2015 at 8:26 AM, Anand Murali  wrote: ...
   Author: Shahab Yunus, 2015-04-22, 12:29
Re: How to stop a mapreduce job from terminal running on Hadoop Cluster? - Hadoop - [mail # user]
...You can kill t by using the following yarn commandyarn application -kill https://hadoop.apache.org/docs/r2.2.0/hadoop-yarn/hadoop-yarn-site/YarnCommands.htmlOr use old hadoop job commandhttp...
   Author: Shahab Yunus, 2015-04-12, 18:08
[expand - 1 more] - Re: Hadoop or spark - Hadoop - [mail # user]
...Thanks for this. Slide# 77 and 87 are pretty good. Quite a few of it,  isnew stuff and still emerging.Regards,ShahabOn Fri, Apr 10, 2015 at 9:10 AM, Peyman Mohajerian wrote: ...
   Author: Shahab Yunus, 2015-04-10, 13:30
Re: compress data in hadoop - Hadoop - [mail # user]
...Your package seems different.Have you tried the following package and class?org.apache.hadoop.io.compress.BZip2CodecRegards,ShahabOn Sun, Apr 5, 2015 at 9:45 AM, xeonmailinglist-gmail <[E...
   Author: Shahab Yunus, 2015-04-05, 13:57
Re: How to append the contents to a output file - Hadoop - [mail # user]
...I hope I understood your requirement correctly.If your requirement is to write into multiple folders from the reducers ANDin each folder append the data in the file in that folder, right?Red...
   Author: Shahab Yunus, 2015-04-02, 11:39
[expand - 1 more] - Re: can't set partition class to the configuration - Hadoop - [mail # user]
...See this for more details in how to write your own Custom Paritioner (evenif a bit outdated, they still give you the basic idea of what you need todo).http://hadooptutorial.wikispaces.com/Cu...
   Author: Shahab Yunus, 2015-04-01, 15:06
Re: Simple MapReduce logic using Java API - Hadoop - [mail # user]
...What is the reason of using the queue?"job.getConfiguration().set("mapred.job.queue.name", "exp_dsa");"Is your mapper or reducer even been called?Try adding the override annotation to the ma...
   Author: Shahab Yunus, 2015-03-31, 18:22
Re: cleanup() in hadoop results in aggregation of whole file/not - Hadoop - [mail # user]
...As far as I understand cleanup is called per task. In your case I.e.per map task. To get an overall count or measure, you need to aggregateit yourself after the job is done.One way to do tha...
   Author: Shahab Yunus, 2015-02-28, 13:10
Re: secure checksum in HDFS - Hadoop - [mail # user]
...There seem to be some work done on this here:https://issues.apache.org/jira/browse/HADOOP-92093rd party tool:https://github.com/rdsr/hdfs-checksumRegards,ShahabOn Fri, Feb 20, 2015 at 12:39 ...
   Author: Shahab Yunus, 2015-02-20, 18:09
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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