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Re: Doubt about SequenceFile.Writer - Hadoop - [mail # user]
...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...
   Author: Jeff Zhang, 2010-02-07, 17:00
Re: Datanode will shut down automatically after it starts - Hadoop - [mail # user]
...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...
   Author: Jeff Zhang, 2010-02-05, 15:41
Re: map side only behavior - Hadoop - [mail # user]
...No, the merge and sort will not happen in mapper task. And each mapper task will generate one output file.    2010/1/29 Gang Luo   �) 8:54:33 上午 [EMAIL PROTECTED]> �) 10:00...
   Author: Jeff Zhang, 2010-01-29, 16:05
[expand - 1 more] - Re: Exception happen when start a single node - Hadoop - [mail # user]
...Hi Nachiket,  Thank you for your reply. But I don't think the page you recommend can solve my problem. The problem on your page is try to solve the namespace version incompatibility. Bu...
   Author: Jeff Zhang, 2010-01-29, 14:40
[expand - 1 more] - Re: Fileformat query - Hadoop - [mail # user]
...Sorry for my mistake, the idea of writing your own InputFormat seems not a good idea. The cost of getting the line number of each split is a little high.    On Fri, Jan 29, 2010 at...
   Author: Jeff Zhang, 2010-01-29, 01:54
Re: Cleanup Attempt in Map Task - Hadoop - [mail # user]
...One easy way is to increase the timeout by setting mapred.task.timeout in mapred-site.xml    On Thu, Jan 28, 2010 at 5:59 PM, #YONG YONG CHENG#  wrote:     Best Rega...
   Author: Jeff Zhang, 2010-01-28, 10:24
Re: setNumReduceTasks(1) - Hadoop - [mail # general]
...*See my comments below*  On Mon, Jan 25, 2010 at 3:22 PM, Something Something  wrote:     *--Maybe you can use Counter to track the number of rows you add to HBase, then ...
   Author: Jeff Zhang, 2010-01-26, 00:09
[expand - 1 more] - Re: How to timeout HFDS commands - Hadoop - [mail # user]
...Then you can put the HDFS operation in one thread, and kill the thread if you want to it timeout    On Fri, Jan 22, 2010 at 6:37 PM, Yiping Han  wrote:    Best Regar...
   Author: Jeff Zhang, 2010-01-22, 10:40
Re: Which config parameters are node-specific? - Hadoop - [mail # user]
...I believe all these parameters can be set as node-specific, because they are in different JVM. Correct me if I am wrong.    On Wed, Jan 20, 2010 at 8:31 AM, Zhang, Zhang wrote: &nb...
   Author: Jeff Zhang, 2010-01-20, 02:32
Re: Exception occurs when I try to read a file - Hadoop - [mail # user]
...I guess the reason is that the version of hadoop on server side is not compatible with the version you use in client side.    On Tue, Jan 19, 2010 at 1:48 PM, ztesoft  wrote: ...
   Author: Jeff Zhang, 2010-01-19, 08:12
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB