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Re: issue with hadoop mapreduce using same job.jar - MapReduce - [mail # user]
...OK nevermind. the problem was that my mate put the test.jar in the hadoop/lib folder... :(   On Wed, Mar 13, 2013 at 1:22 AM, Ben Kim  wrote:      *Benjamin Kim* *be...
   Author: Ben Kim, 2013-03-12, 16:23
Re: issue with hadoop mapreduce using same job.jar - MapReduce - [mail # user]
...Things I tried so far without a luck     - restart the hadoop    - sync && echo 3 > /proc/sys/vm/drop_caches    - clear namenode java cache using jcontrol &n...
   Author: Ben Kim, 2013-03-12, 16:22
issue with hadoop mapreduce using same job.jar - MapReduce - [mail # user]
...Hi there  It looks like the job.jar created in the /user/hadoop/.staging/ folder is always the same no matter which jar file i give.  if i download the job.jar file then I reckon t...
   Author: Ben Kim, 2013-03-12, 16:00
Re: Multiple reduce task retries running at same time - MapReduce - [mail # user]
...Attached a screenshot showing the retries  On Tue, Jan 29, 2013 at 4:35 PM, Ben Kim  wrote:      *Benjamin Kim* *benkimkimben at gmail*...
   Author: Ben Kim, 2013-01-29, 07:38
Multiple reduce task retries running at same time - MapReduce - [mail # user]
...Hi!  I have come across the situation where i found a single reducer task executing with multiple retries simultaneously. Which is potent for slowing down the whole reduce process for l...
   Author: Ben Kim, 2013-01-29, 07:35
Re: Streaming Job map/reduce not working with scripts on 1.0.3 - MapReduce - [mail # user]
...nevermind. the problem has been fixed.  The problem was the trailing {control-v}{control-m} character on the first line of #!/bin/bash (which i blame my teammate for writing the script ...
   Author: Ben Kim, 2013-01-04, 11:57
Streaming Job map/reduce not working with scripts on 1.0.3 - MapReduce - [mail # user]
...Hi !  I'm using hadoop-1.0.3 to run streaming jobs with map/reduce shell scripts such as this  bin/hadoop jar ./contrib/streaming/hadoop-streaming-1.0.3.jar -input /input -output /...
   Author: Ben Kim, 2013-01-04, 11:09
Re: use S3 as input to MR job - MapReduce - [mail # user]
...I'm having a similar issue  I'm running a wordcount MR as follows  hadoop jar WordCount.jar wordcount.WordCountDriver   s3n://bucket/wordcount/input is a s3 object that contai...
   Author: Ben Kim, 2012-10-02, 10:05
Re: Error reading task output - MapReduce - [mail # user]
...Bejoy, Thanks alot for your response. You are right. The problem is with the misconfigured nproc on the OS. Originally, my limits.conf file was something like this:  * hard    ...
   Author: Ben Kim, 2012-07-27, 17:04
Re: Error reading task output - MapReduce - [mail # user]
...Hi I'm having a similar problem so I'll continue on this mailing to describe my issue.  I ran a MR job that takes 70GB of input and creates 1098 mappers and 100 Reducers to process task...
   Author: Ben Kim, 2012-07-27, 09:38
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