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NullPointerExceptipn in getPos of buffered FsDataInputStream - Hadoop - [mail # dev]
...I'm finding funny behaviour in the multifilewordcount example .  The getPos implementation in the RecirdReader is failing for me when the input steam is closed, and throwing a cryptic n...
   Author: Jay Vyas, 2013-09-10, 00:53
RawLocalFileSystem, getPos and NullPointerException - Hadoop - [mail # user]
...What is the correct behaviour for getPos  in a record reader, and how should it behave when the underlying stream is null?  It appears this can happen in the rawlocalfilesystem. &n...
   Author: Jay Vyas, 2013-09-10, 00:01
MultiFileLineRecodrReader vs CombineFileRecordReader - Hadoop - [mail # user]
...I've found that there are two different implementations of seemingly the same class:  MultiFileLineRecordReader (implemented as an inner class in some versions of MultiFileWordCount) an...
   Author: Jay Vyas, 2013-09-07, 21:53
Mapred.system.dir: should JT start without it? - Hadoop - [mail # user]
...Is there a startup for contract mapreduce making its own mapred.system.dir  ?   Also, it seems that the jobtracker can startup even if this directory was not created / doesn't exis...
   Author: Jay Vyas, 2013-08-15, 13:24
Staging directory ENOTDIR error. - Hadoop - [mail # user]
...Hi , I'm getting an ungoogleable exception, never seen this before.  This is on a hadoop 1.1. cluster... It appears that its permissions related... Any thoughts as to how this could cro...
   Author: Jay Vyas, 2013-07-11, 22:41
[expand - 1 more] - Re: JobSubmissionFiles: past , present, and future? - Hadoop - [mail # user]
...To update on this, it was just pointed out to me by matt farrallee  that the auto fix of permissions is for a failsafe  in case of a race condition, and not meant to mend bad permi...
   Author: Jay Vyas, 2013-04-12, 12:21
[expand - 1 more] - Re: Copy Vs DistCP - Hadoop - [mail # user]
...DistCP is a full blown mapreduce job (mapper only, where the mappers do a "fully" parallel copy to the detsination).  CP appears (correct me if im wrong) to simply invoke the FileSystem...
   Author: Jay Vyas, 2013-04-10, 23:51
Re: No bulid.xml when to build FUSE - Hadoop - [mail # user]
...hadoop-hdfs builds with maven, not ant.  You might also need to install the serialization libraries.  See http://wiki.apache.org/hadoop/HowToContribute .  As an aside, you cou...
   Author: Jay Vyas, 2013-04-10, 14:28
[expand - 1 more] - Re: MVN repository for hadoop trunk - Hadoop - [mail # user]
...Hi guys Hope this helps someone:  I put in a pull request for adding the hadoop snapshot dependencies into a pom file.  Its pretty simple - just add the repository XML block in the...
   Author: Jay Vyas, 2013-04-06, 22:11
Re: How do _you_ document your hadoop jobs? - Hadoop - [mail # user]
...Wow that's very heavy weight and difficult to modify. Why not graphviz or generating the diagrams from some Or text format.?    On Feb 25, 2013, at 4:11 AM, "David Parks"  wro...
   Author: Jay Vyas, 2013-02-25, 14:55
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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