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Re: hadoop job progress going back - Hadoop - [mail # user]
...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?...
   Author: Jeff Zhang, 2009-12-27, 10:28
Re: java.io.IOException: Error opening job jar - Hadoop - [mail # user]
...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...
   Author: Jeff Zhang, 2009-12-27, 06:18
Re: reading sequence Files on local file system - Hadoop - [mail # user]
...The NullPointerException is because the Configuration of your FileSystem is null. So use FileSystem.getLocal(new Configuration())  instead of new LocalFileSystem()   Jeff Zhang &nb...
   Author: Jeff Zhang, 2009-12-26, 09:13
[expand - 1 more] - Re: Type mismatch in key from map - Hadoop - [mail # general]
...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...
   Author: Jeff Zhang, 2009-12-24, 04:01
Re: How to use LinkedList in Hadoop? - Hadoop - [mail # user]
...What is the activeList ? a local variable or class member variable?   On Wed, Dec 23, 2009 at 6:30 AM, oo famcr  wrote:  ...
   Author: Jeff Zhang, 2009-12-23, 14:47
[expand - 2 more] - Re: Alternative to JobConf - Hadoop - [mail # user]
...You should add the jar to the classpath of your eclipse project.  Right click the jar and choose Build path ---> Add to Build Path.  Jeff Zhang    On Fri, Dec 18, 2009...
   Author: Jeff Zhang, 2009-12-18, 17:31
RE: context.collect - Hadoop - [mail # user]
...Farhan,  In hadoop 0.20.x,  using context.write(key,value) instead of outputcollector.collect(key,value). And It's the RecordWriter in Context do the write operation.  Jeff Zh...
   Author: Jeff Zhang, 2009-12-18, 17:09
[expand - 1 more] - Re: What's HDFS's balancer criteria? - Hadoop - [mail # user]
...It's my mistake, the balancer process is so slow that make me think it balance regarding the block  Jeff Zhang  On Fri, Dec 18, 2009 at 8:36 PM, Brian Bockelman wrote:  ...
   Author: Jeff Zhang, 2009-12-18, 13:05
Re: do sth after map task finish - Hadoop - [mail # user]
...With hadoop's old API, you can make your map class extends MapReduceBase, and override the close() to do what you want. In hadoop's new API, you can create your map extends org.apache.hadoop...
   Author: Jeff Zhang, 2009-12-18, 05:42
Re: Error in cluster setup - Hadoop - [mail # user]
...Does your machines can ssh to each other ? And can open the JobTracker Web UI?  Jeff Zhang   On Fri, Dec 18, 2009 at 1:25 PM, anjali nair  wrote:  ...
   Author: Jeff Zhang, 2009-12-18, 05:35
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