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RE: How to configure multiple reduce jobs in hadoop 2.2.0 - MapReduce - [mail # user]
...Yong     The simple explanation is that a Java application  is not just limited by the heap size.  As an example, Tom White’s Hadoop The Definitive Guide, page 323: the j...
   Author: German Florez-Larrahondo, 2014-01-17, 15:48
[MAPREDUCE-5715] ProcfsBasedProcessTree#constructProcessInfo() can still throw NumberFormatException - MapReduce - [issue]
...For long running jobs I have hit an issue that seems to be to be similar to the bug reported in https://issues.apache.org/jira/browse/MAPREDUCE-3583Unfortunately I do not have the OS logs fo...
http://issues.apache.org/jira/browse/MAPREDUCE-5715    Author: German Florez-Larrahondo, 2014-01-10, 05:59
RE: Distributing the code to multiple nodes - MapReduce - [mail # user]
...Ashish  Could this be related to the scheduler you are using and its settings?.     On lab environments when running a single type of job I often use FairScheduler (the YARN d...
   Author: German Florez-Larrahondo, 2014-01-09, 14:23
RE: JAVA cannot execute binary file - MapReduce - [mail # user]
...This could be because you are trying to run the incorrect version of java for your platform     What do you see when you do the following        ubuntu@---:~$ f...
   Author: German Florez-Larrahondo, 2014-01-07, 21:58
RE: get job data in command line in MRv2 - MapReduce - [mail # user]
...Perhaps some of the data you require can be obtained with the mapred tool (here I’m using 2.2.0)     e.g.        htf@ivygerman:~/hadoop/bin$ ./mapred job  ...
   Author: German Florez-Larrahondo, 2014-01-02, 16:31
RE: Unable to change the virtual memory to be more than the default 2.1 GB - MapReduce - [mail # user]
...A few things you can try     a)      If you don't care about virtual memory controls at all you can bypass it by doing the following change in the XML and restarting...
   Author: German Florez-Larrahondo, 2014-01-02, 16:18
RE: Setting up Snappy compression in Hadoop - MapReduce - [mail # user]
...Amit  You may also need to check whether the native library you are using includes Snappy or not.      For example, when you compile from source and the libsnappy.so is n...
   Author: German Florez-Larrahondo, 2014-01-02, 16:06
RE: Compilation problem of Hadoop Projects after Import into Eclipse - MapReduce - [mail # user]
...Sathwik      I experienced something similar a few weeks ago.  I reported a JIRA on the documentation of this, please comment there     https://issues.apache.or...
   Author: German Florez-Larrahondo, 2013-08-07, 13:04
Question on "mapred." vs "mapreduce." settings for Hadoop trunk and 2.x - MapReduce - [mail # dev]
...Regards     By looking at the code in trunk and release 2.0.5 I noticed that while most settings related to MapReduce now have the mapreduce prefix (as in "mapreduce.job.dir") ther...
   Author: German Florez-Larrahondo, 2013-07-18, 18:38
RE: Fault tolerance and Speculative Execution - MapReduce - [mail # user]
...Also, a  simple explanation of how speculative execution works and what are the key settings  can be found here: http://books.google.com/books?id=Wu_xeGdU4G8C&pg=PA216&dq=hadoop+th...
   Author: German Florez-Larrahondo, 2013-07-18, 17:37
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