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Re: Memory exception in the mapper - Hadoop - [mail # user]
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...Arun, Actually CDH3 is Hadoop 0.20, but with .21 backported, so I am using 0.21 API whenever I can. Mark On Wed, May 23, 2012 at 9:40 PM, Mark Kerzner wrote: ...
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Author: Mark Kerzner,
2012-05-24, 02:48
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Re: Memory exception in the mapper - Hadoop - [mail # user]
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...Arun, I am running the latest CDH3, which I re-installed yesterday, so I believe it is Hadoop 0.21. I have about 6000 maps emitted, and 16 spills, and then I see Mapper cleanup()...
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Author: Mark Kerzner,
2012-05-24, 02:40
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Re: Memory exception in the mapper - Hadoop - [mail # user]
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...Joey, my errors closely resembles this onein the archives. I can now be much more specific with the errors message, and it is quoted below. I tried -Xmx3096. But I got the same error. ...
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Author: Mark Kerzner,
2012-05-24, 02:35
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Memory exception in the mapper - Hadoop - [mail # user]
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...Hi, all, I got the exception below in the mapper. I already have my global Hadoop heap at 5 GB, but is there a specific other setting? Or maybe I should troubleshoot for memory? ...
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Author: Mark Kerzner,
2012-05-23, 19:16
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Re: Where does Hadoop store its maps? - Hadoop - [mail # user]
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...Thank you, Harsh and Madhu, that is exactly what I was looking for. Mark On Tue, May 22, 2012 at 8:36 AM, madhu phatak wrote: ...
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Author: Mark Kerzner,
2012-05-22, 14:01
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Where does Hadoop store its maps? - Hadoop - [mail # user]
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...Hi, I am using a Hadoop cluster of my own construction on EC2, and I am running out of hard drive space with maps. If I knew which directories are used by Hadoop for map spill, I could...
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Author: Mark Kerzner,
2012-05-22, 13:28
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Re: Yahoo Hadoop Tutorial with new APIs? - Hadoop - [mail # user]
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...Hi, any interest in joining with this effort of mine? http://hadoopilluminated.com/ - I am also doing only for community benefit. I have more chapters that I am putting out. But, I wan...
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Author: Mark Kerzner,
2012-04-04, 21:35
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Getting different results every time I run the same job on the cluster - Hadoop - [mail # user]
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...Hi, I have to admit, I am lost. My code is stable on a pseudo distributed cluster, but every time I run it one a 4 - slave cluster, I get different results, ranging from 100 outp...
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Author: Mark Kerzner,
2012-03-09, 03:34
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Re: Clickstream and video Analysis - Hadoop - [mail # user]
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...http://www.wibidata.com/ Only it's not open source :) You can research the story by looking at http://www.youtube.com/watch?v=pUogubA9CEA to start Mark On Wed, Feb 22...
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Author: Mark Kerzner,
2012-02-23, 05:37
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Re: Is default number of reducers = 1? - Hadoop - [mail # user]
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...Indeed, worked like a charm. Some strange thing that I see is that the more reducers I run, the more data I get on the output. However, my suspicion is that since I use some global cou...
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Author: Mark Kerzner,
2012-02-21, 05:42
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