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Map Rask has IO exception - MapReduce - [mail # user]
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...My job is dying during a map task write. This happened in enough task to kill the job although most tasks succeeded - Any ideas as to where to start diagnosing the problem ...
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Author: Steve Lewis,
2011-11-05, 17:09
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Re: How do I diagnose a really slow copy - MapReduce - [mail # user]
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...The task has been running several hours and the map phase is essentially a null mapper - rewrite the key and value stored by an earlier reducer. There is no firewall - the entire job is runn...
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Author: Steve Lewis,
2011-11-04, 19:26
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How do I diagnose a really slow copy - MapReduce - [mail # user]
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...I have been finding a that my cluster is running abnormally slowly A typical reduce task reports reduce > copy (113 of 431 at 0.07 MB/s) 70 kb / second is a truely dreadful rate and tasks...
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Author: Steve Lewis,
2011-11-04, 15:20
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Problems with MR Job running really slowly - MapReduce - [mail # user]
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...I have a job which takes an xml file - the splitter breaks the file into tags, the mapper parses each tag and sends the data to the reducer. I am using a custom splitter which reads the file...
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Author: Steve Lewis,
2011-11-04, 03:07
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Re: Is there any way for a single map job to show progress - MapReduce - [mail # user]
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...So how does a custom reader to that??? On Thu, Nov 3, 2011 at 10:28 AM, wrote: Steven M. Lewis PhD 4221 105th Ave NE Kirkland, WA 98033 206-384-1340 (cell) Skype lor...
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Author: Steve Lewis,
2011-11-03, 18:02
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Error reading task outputhttp - MapReduce - [mail # user]
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...I think my hdfs may be sick but when I run jobs on out 8 node cluster I have started seeing 11/10/26 15:42:30 WARN mapred.JobClient: Error reading task outputhttp:// glados6.systemsbio...
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Author: Steve Lewis,
2011-10-26, 22:53
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Is there any way for a single map job to show progress - MapReduce - [mail # user]
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...My map task needs to handle a large gzipped file and site at 0% forever until it hits 100% there is no way to split the file but it would be nice if there were some indication of progress - ...
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Author: Steve Lewis,
2011-10-26, 00:55
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Has anyone written a program to show total use on hdfs by directory - MapReduce - [mail # user]
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...While I can see file sizes with the web interface, it is very difficult to tell which directories are taking up space especially when nested by several levels Steven M. Lewis PhD 4221 ...
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Author: Steve Lewis,
2011-10-26, 00:51
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Is there a good way to see how full hdfs is - MapReduce - [mail # user]
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...We have a small cluster with HDFS running on only 8 nodes - I believe that the partition assigned to hdfs might be getting full and wonder if the web tools or java api havew a way to look at...
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Author: Steve Lewis,
2011-10-15, 00:16
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Re: Problems Mapping multigigabyte file - MapReduce - [mail # user]
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...Yes and I presume that both the cases that succeed and fail are being split On Fri, Oct 14, 2011 at 8:49 AM, Justin Woody wrote: Steven M. Lewis PhD 4221 105th Ave ...
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Author: Steve Lewis,
2011-10-14, 16:03
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