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Re: Identity Reducer - Hadoop - [mail # user]
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...I guess you are using org.apache.hadoop.mapreduce.Mapper which is a class for hadoop new API. you can use the org.apache.hadoop.mapred.Mapper which is for old API On Thu, Feb 11...
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Author: Jeff Zhang,
2010-02-12, 01:19
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Re: Job Tracker questions - Hadoop - [mail # user]
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...JobClient also use proxy of JobTracker. On Mon, Feb 8, 2010 at 11:19 PM, Mark N wrote: Best Regards Jeff Zhang...
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Author: Jeff Zhang,
2010-02-09, 15:04
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Re: Doubt about SequenceFile.Writer - Hadoop - [mail # user]
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...The SequenceFile is not text file, so you can not see the content by invoking unix command cat. But you can get the text content by using hadoop command : hadoop fs -text On Sun...
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Author: Jeff Zhang,
2010-02-07, 17:00
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Re: Datanode will shut down automatically after it starts - Hadoop - [mail # user]
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...It looks like the data node can not connect to the name node. Are you sure the data node and name node use the same version of hadoop ? On Fri, Feb 5, 2010 at 7:24 AM, gillggx wr...
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Author: Jeff Zhang,
2010-02-05, 15:41
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Re: Job Tracker questions - Hadoop - [mail # user]
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...I look at the source code, it seems the job tracker web ui also use the proxy of JobTracker to get the counter information rather the xml file. On Thu, Feb 4, 2010 at 7:29 PM, Mark N ...
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Author: Jeff Zhang,
2010-02-04, 11:36
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Re: Job Tracker questions - Hadoop - [mail # user]
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...You can use org.apache.hadoop.ipc.RPC.getProxy(....) to initialize the proxy of JobTracker On Thu, Feb 4, 2010 at 7:23 PM, Jeff Zhang wrote: Best Regards &nb...
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Author: Jeff Zhang,
2010-02-04, 11:27
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Re: Job Tracker questions - Hadoop - [mail # user]
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...I think you can create web service using Java, and then in .net using the web service to display the result. On Thu, Feb 4, 2010 at 7:21 PM, Jeff Zhang wrote: Best...
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Author: Jeff Zhang,
2010-02-04, 11:23
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Re: Job Tracker questions - Hadoop - [mail # user]
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...Do you mean want to connect the JobTracker using .Net ? If so, I'm afraid I have no idea how to this. The rpc of hadoop is language dependent. On Thu, Feb 4, 2010 at 7:18 PM, Ma...
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Author: Jeff Zhang,
2010-02-04, 11:21
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Re: Job Tracker questions - Hadoop - [mail # user]
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...Well, you can create a proxy of JobTracker in client side, and then you can use the API of JobTracker to get the information of jobs. The Proxy take the responsibility of communication...
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Author: Jeff Zhang,
2010-02-04, 11:08
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Re: Job Tracker questions - Hadoop - [mail # general]
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...I think you can use JobClient to get the counters in your web service. If you look at the shell script bin/hadoop, you will find that actually this shell use the JobClient to get the counter...
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Author: Jeff Zhang,
2010-02-03, 14:48
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