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How to reuse the nodes in blacklist ? - Hadoop - [mail # user]
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...Hi all, Two of my nodes are in the blacklist, and I want to reuse them again. How can I do that ? Thank you. Jeff Zhang...
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Author: Jeff Zhang,
2010-01-05, 08:57
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Re: how to use InputSampler & TotalOrderPartitioner? - Hadoop - [mail # user]
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...Because the shuffle phase start as soon as any mapper task finish, and the shuffle phase needs the Partitioner to route the output of mapper to reducer. So the sampler must complete before t...
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Author: Jeff Zhang,
2010-01-05, 06:26
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Re: Killing a Hadoop job - Hadoop - [mail # user]
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...invoke command: hadoop job -kill jobID Jeff Zhang On Tue, Dec 29, 2009 at 10:02 PM, Mark Kerzner wrote: ...
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Author: Jeff Zhang,
2009-12-30, 06:07
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Re: Implementing VectorWritable - Hadoop - [mail # user]
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...The readFields and write method is empty ? When data is transfered from map phase to reduce phase, data is serialized and deserialized , so the write and readFields will be called. You...
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Author: Jeff Zhang,
2009-12-29, 05:55
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Re: VectorWritable - Hadoop - [mail # user]
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...It's easy to implement it. You can wrap a List and size (in type) into VectorWritable, and implements the Writable interface Jeff Zhang On Sun, Dec 27, 2009 at 8:00 PM, bharath...
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Author: Jeff Zhang,
2009-12-28, 04:21
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Is there any formal document about the TFile ? - Hadoop - [mail # user]
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...Hi all, I'd like to deep into internal structure of TFile, from the javadoc and jira-HADOOP-3315, it sounds TFile is a bit like the SequenceFile, but also it has index which makes it l...
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Author: Jeff Zhang,
2009-12-27, 15:35
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Re: hadoop job progress going back - Hadoop - [mail # user]
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...No, if you look at the click the job id and watch the details of this job, some task must failed. Jeff Zhang 2009/12/27 Doopah Shaf ues?...
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Author: Jeff Zhang,
2009-12-27, 10:28
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Re: java.io.IOException: Error opening job jar - Hadoop - [mail # user]
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...It seems something wrong with your jar. Can you run your jar locally ? Jeff Zhang On Wed, Dec 23, 2009 at 12:59 PM, Purnima Balu -X (pbalu - Linkwex at Cisco) wrote: &nbs...
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Author: Jeff Zhang,
2009-12-27, 06:18
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Re: reading sequence Files on local file system - Hadoop - [mail # user]
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...The NullPointerException is because the Configuration of your FileSystem is null. So use FileSystem.getLocal(new Configuration()) instead of new LocalFileSystem() Jeff Zhang &nb...
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Author: Jeff Zhang,
2009-12-26, 09:13
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Re: Type mismatch in key from map - Hadoop - [mail # general]
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...The KeyValueTextInputFormat is deprecated in hadoop 0.20.1, and there's a new one in trunk for new api. I think you should use part-00000 rather than part-r-00000, then you will get no IOExc...
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Author: Jeff Zhang,
2009-12-24, 04:01
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