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Re: X not in slaves, yet still being used as a tasktracker - Hadoop - [mail # user]
...Aha,there isn't a tasktracker running on X, yet jps shows 4 children and when jobs fail i see failures on X too. So what exactly can I stop? jps output on X 20044 org.apache.hadoop.mapred.Jo...
   Author: Saptarshi Guha, 2009-03-31, 17:51
Re: JNI and calling Hadoop jar files - Hadoop - [mail # user]
...Delayed response. However, I stand corrected. I was using a package called rJava which integrates R and java. Maybe there was a classloader issue but once I rewrote my stuff using C and JNI,...
   Author: Saptarshi Guha, 2009-03-27, 19:51
Task Side Effect files and copying(getWorkOutputPath) - Hadoop - [mail # user]
...Hello, I would like to produce side effect files which will be later copied to the outputfolder. I am using FileOuputFormat, and in the Map's close() method i copy files (from the local tmp/...
   Author: Saptarshi Guha, 2009-03-16, 15:59
Throwing an IOException in Map, yet task does not fail - Hadoop - [mail # user]
...Hello, I have given a case where my mapper should fail. That is, based on a result it throws an exception if(res==0) throw new IOException("Error in code!, see stderr/out"); , When i go to t...
   Author: Saptarshi Guha, 2009-03-06, 02:42
Throw an exception if the configure method fails - Hadoop - [mail # user]
...hello, I'm not that comfortable with java, so here is my question. In the MapReduceBase class, i have implemented the configure method, which does not throw an exception. Suppose I detect an...
   Author: Saptarshi Guha, 2009-03-06, 00:24
Re: Mapreduce jobconf options:webpage - Hadoop - [mail # user]
...Thank you Saptarshi Guha    On Thu, Mar 5, 2009 at 6:56 PM, james warren  wrote:  your wrote:...
   Author: Saptarshi Guha, 2009-03-06, 00:20
Re: RecordReader and non thread safe JNI libraries - Hadoop - [mail # user]
...Hello, I am quite confused and my email seems to prove it. My question is essentially, I need to use this non thread safe library in the Mapper, Reducer and RecordReader. assume, i do not cr...
   Author: Saptarshi Guha, 2009-03-02, 04:33
Re: Limit number of records or total size in combiner input using jobconf? - Hadoop - [mail # user]
...Thank you.     On Fri, Feb 20, 2009 at 5:34 PM, Chris Douglas  wrote:...
   Author: Saptarshi Guha, 2009-02-24, 02:36
Re: Very large file copied to cluster, and the copy fails. All blocks bad - Hadoop - [mail # user]
...Yes, exactly.  Thanks! I uploaded it from an off cluster (i.e not participating in the hdfs) and it worked splendidly.  Regards Saptarshi   On Thu, Feb 12, 2009 at 11:03 PM, T...
   Author: Saptarshi Guha, 2009-02-13, 05:51
FileInnputFormat, FileSplit, and LineRecorder: where are they run? - Hadoop - [mail # user]
...Hello All, In order to get a better understanding of Hadoop, i've started reading the source and have a question The FileInputFormat, reads in files, splits into splitsizes (which may be big...
   Author: Saptarshi Guha, 2009-02-05, 21:24
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