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Re: How to configure mapreduce archive size? - MapReduce - [mail # user]
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...TableMapReduceUtil has APIs like addDependencyJars which will use DistributedCache. I don't think you are explicitly using that. Are you using any command line arguments like -libjars etc wh...
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Author: Hemanth Yamijala,
2013-04-12, 04:09
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Re: Copy Vs DistCP - MapReduce - [mail # user]
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...AFAIK, the cp command works fully from the DFS client. It reads bytes from the InputStream created when the file is opened and writes the same to the OutputStream of the file. It does not wo...
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Author: Hemanth Yamijala,
2013-04-11, 07:40
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Re: How to configure mapreduce archive size? - MapReduce - [mail # user]
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...Could you paste the contents of the directory ? Not sure whether that will help, but just giving it a shot. What application are you using ? Is it custom MapReduce jobs in which you us...
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Author: Hemanth Yamijala,
2013-04-11, 07:28
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Re: Child JVM memory allocation / Usage - MapReduce - [mail # user]
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...Hmm. How are you loading the file into memory ? Is it some sort of memory mapping etc ? Are they being read as records ? Some details of the app will help On Mon, Mar 25, 2013 at 2:14...
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Author: Hemanth Yamijala,
2013-03-25, 13:09
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Re: Child JVM memory allocation / Usage - MapReduce - [mail # user]
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...Hi, The free memory might be low, just because GC hasn't reclaimed what it can. Can you just try reading in the data you want to read and see if that works ? Thanks Hemanth ...
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Author: Hemanth Yamijala,
2013-03-25, 06:31
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Re: About running a simple wordcount mapreduce - MapReduce - [mail # user]
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...Which version of Hadoop are you using. A quick search shows me a bug https://issues.apache.org/jira/browse/HADOOP-5241 that seems to show similar symptoms. However, that was fixed a long whi...
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Author: Hemanth Yamijala,
2013-03-25, 06:11
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Re: MapReduce Failed and Killed - MapReduce - [mail # user]
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...Any MapReduce task needs to communicate with the tasktracker that launched it periodically in order to let the tasktracker know it is still alive and active. The time for which silence is to...
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Author: Hemanth Yamijala,
2013-03-25, 05:30
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Re: map reduce and sync - MapReduce - [mail # user]
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...I am using the same version of Hadoop as you. Can you look at something like Scribe, which AFAIK fits the use case you describe. Thanks Hemanth On Sun, Feb 24, 2013 at 3:3...
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Author: Hemanth Yamijala,
2013-02-25, 01:31
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Re: map reduce and sync - MapReduce - [mail # user]
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...Hi Lucas, I tried something like this but got different results. I wrote code that opened a file on HDFS, wrote a line and called sync. Without closing the file, I ran a wordcoun...
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Author: Hemanth Yamijala,
2013-02-23, 14:54
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Re: Reg job tracker page - MapReduce - [mail # user]
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...Yes. It corresponds to the JT start time. Thanks hemanth On Sat, Feb 23, 2013 at 5:37 PM, Manoj Babu wrote: ...
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Author: Hemanth Yamijala,
2013-02-23, 13:09
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