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Re: Merge Reducers Output - Hadoop - [mail # user]
...Its not clear to me that you need custom input formats....  1) Getmerge might work or  2) Simply run a SINGLE reducer job (have mappers output static final int key=1, or specify nu...
   Author: Jay Vyas, 2012-07-31, 05:08
EMR classpath overiding over all mappers/reducers - Hadoop - [mail # user]
...HI guys :  I have an EMR job which seems to be loading "old" versions of an aws-sdk-java jar.  I looked closer and found that the hadoop nodes im using in fact have a old version o...
   Author: Jay Vyas, 2012-07-27, 04:07
Simply reading small a hadoop text file. - Hadoop - [mail # user]
...Hi guys : Whats the idiomatic way to iterate through the k/v pairs in a text file ? been playing with almost everything everything with SequenceFiles and almost forgot :)  my text outpu...
   Author: Jay Vyas, 2012-07-14, 00:30
fixing the java / unixPrincipal hadoop error... Ubuntu. - Hadoop - [mail # user]
...Hi guys : I run into the following roadblock in my VM - and Im not sure what the right way to install sun java is.  Any suggestions? In particular, the question is best described here: ...
   Author: Jay Vyas, 2012-07-08, 21:48
Sun JDK 1.6.033: java.lang.ClassNotFoundException: com.sun.security.auth.UnixPrincipal - Hadoop - [mail # user]
...Hi guys: Im getting this very odd error in my sun / ubuntu / hadoop run.  -  im not running a hadoop cluster here, just some local FS java hadoop map/r jobs. - The exception Im get...
   Author: Jay Vyas, 2012-07-02, 04:30
[expand - 1 more] - Re: counters docs - Hadoop - [mail # user]
...Sure I will get started on this.  Thanks for the feedback.  On Thu, May 31, 2012 at 1:29 PM, Arun C Murthy  wrote:    Jay Vyas MMSB/UCHC...
   Author: Jay Vyas, 2012-05-31, 12:37
Job constructore deprecation - Hadoop - [mail # user]
...Hi guys : I have noticed that the comments for this class encourage us to use the Job constructors, yet, they are deprecated.  http://hadoop.apache.org/mapreduce/docs/current/api/org/ap...
   Author: Jay Vyas, 2012-05-23, 03:32
[expand - 1 more] - Re: Simulating cluster config parameters (in local mode) - Hadoop - [mail # user]
...Ahhh I now know the answer : My solution :  1) Get a simple mapred config file and remove all parameters but the one i need to set for my local mode. 2) Put the mapred site config .xml ...
   Author: Jay Vyas, 2012-05-09, 21:14
heap space error, low memory job, unit test - Hadoop - [mail # user]
...Hi guys :   I have a map/r job that has always worked fine, but which fails due to a heap space error on my local machine during unit tests.  It runs in hadoop's default mode, and ...
   Author: Jay Vyas, 2012-05-02, 00:21
EMR Hadoop - Hadoop - [mail # user]
...Hi guys :  1) Does anybody know if there is a VM out there which runs EMR hadoop ?  I would like to have a local vm for dev purposes that mirrored the EMR hadoop instances.  2...
   Author: Jay Vyas, 2012-04-30, 04:57
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