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Re: io.sort.factor - Hadoop - [mail # user]
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...Hi Bharat, I am looking at these logs - 2013-01-22 07:35:42,923 INFO org.apache.hadoop.mapred.MapTask: Finished spill 2 The number at the end of string does not go beyond 6. So I...
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Author: Ajay Srivastava,
2013-01-23, 07:16
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io.sort.factor - Hadoop - [mail # user]
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...Hi, io.sort.factor -- The number of streams to merge at once while sorting files. This determines the number of open file handles. How can I use this parameter to im...
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Author: Ajay Srivastava,
2013-01-23, 06:23
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Query about Speculative Execution - Hadoop - [mail # user]
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...Hi, What is the behavior of jobTracker if speculative execution is off and a task on data node is running extremely slow? Will the jobTracker simply wait till the slow running task fin...
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Author: Ajay Srivastava,
2012-12-06, 14:57
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Too many fetch-failures - Hadoop - [mail # user]
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...Hi, I am getting following errors - 12/12/03 17:11:42 INFO mapred.JobClient: Task Id : attempt_201212031650_0001_m_000011_0, Status : FAILED Too many fetch-failures attempt_20121...
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Author: Ajay Srivastava,
2012-12-03, 17:21
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Re: How to split a sequence file - Hadoop - [mail # user]
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...Hi Jason, I am wondering about use case of distributing records on the basis of key t o mapper. If possible, could you please share your scenario ? Is it map only job ? Why not distribute re...
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Author: Ajay Srivastava,
2012-09-12, 05:35
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Re: Non utf-8 chars in input - Hadoop - [mail # user]
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...Rekha, I guess that problem is that Text class uses utf-8 encoding and one can not set other encoding for this class. I have not seen any other Text like class which supports oth...
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Author: Ajay Srivastava,
2012-09-11, 08:21
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Grouping comparator - Hadoop - [mail # user]
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...Hi, Can someone please explain default implementation of grouping comparator i. e. if I do not specify a custom grouping comparator then which comparator i s called to decide the group...
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Author: Ajay Srivastava,
2012-06-04, 10:56
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Different input streams - Hadoop - [mail # user]
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...Hi, If there are two inputs to a hadoop job one is text and another is binary ( Sequence file), is there a way to set InputFormatClass to these two differe nt streams ? job.setInputFor...
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Author: Ajay Srivastava,
2012-05-01, 08:02
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Re: Passing a value from main() to map() - Hadoop - [mail # user]
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...Hi, It seems that you are trying to code a hadoop job which takes input from stdin ? As far as I know it is not possible as hadoop job works on input coming in batches not on real time strea...
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Author: Ajay Srivastava,
2012-04-26, 09:28
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Re: How to modify hadoop-wordcount example to display File-wise results. - Hadoop - [mail # user]
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...Hi Aaron, I guess that it can be done by using counters. You can define a counter for each node in your cluster and then, in map met hod increment a node specific counter either by checking ...
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Author: Ajay Srivastava,
2012-03-30, 00:57
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