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Re: Reduce task hang[EMERGENCE] - Hadoop - [mail # user]
...Does the Reduce task log (of attempt_201312201200_34795_r_000000_0) show any errors in trying to communicate with the various TaskTrackers in trying to obtain the data?  On Fri, Jan 3, ...
   Author: Harsh J, 2014-01-03, 05:13
Re: Datanode registration, port number - Hadoop - [mail # dev]
...Hi,  On Mon, Dec 23, 2013 at 9:41 AM, Dhaivat Pandya  wrote:  Curious Q: What does your cache layer aim to do btw? If its a data cache, have you checked out the design being i...
   Author: Harsh J, 2013-12-24, 05:46
Re: empty file - Hadoop - [mail # user]
...That file is still in an 'open' state. Running the below may show it up:  /opt/local/hadoop/bin/hadoop fsck /tmp/corrupt_lzo/lc_hadoop16.1386270004881.lzo  -openforwrite  On T...
   Author: Harsh J, 2013-12-12, 04:09
Re: issue about file in DN datadir - Hadoop - [mail # user]
...As posted on the other thread, your find expression includes the genstamp, for example:  find /data -name 'blk_-5451264646515882190*'  On Wed, Dec 11, 2013 at 2:44 PM, ch huang &nb...
   Author: Harsh J, 2013-12-11, 09:43
Re: How can I get FSNamesystem of running NameNode in cluster? - Hadoop - [mail # dev]
...Hi Yoonmin,  Yes, your conclusions here are correct. The FSNamesystem is an object internal to the NameNode server runtime.  On Mon, Dec 9, 2013 at 8:49 PM, Yoonmin Nam  wrote...
   Author: Harsh J, 2013-12-10, 06:42
Re: How can I remote debug application master - Hadoop - [mail # user]
...When constructing the AM's java command in your launcher/driver, you could add in your remote debug JVM arguments, which should work.  On Tue, Nov 26, 2013 at 7:34 AM, Jeff Zhang  ...
   Author: Harsh J, 2013-11-26, 10:17
Re: New data on unfinalized hdfs upgrade - Hadoop - [mail # user]
...If you "rollback", you lose all new data.  On Sat, Nov 16, 2013 at 12:25 AM, krispyjala  wrote:    Harsh J...
   Author: Harsh J, 2013-11-15, 22:04
Re: Why SSH - Hadoop - [mail # user]
...Neither of those. We stream data directly over a TCP network socket.  Please read http://wiki.apache.org/hadoop/FAQ#Does_Hadoop_require_SSH.3F regarding your SSH confusion.  On Mon...
   Author: Harsh J, 2013-11-11, 06:41
Re: EclipsePlugin source in branch-2.x.x - Hadoop - [mail # user]
...The Eclipse/Other IDE integration efforts are now being lead by the Hadoop Developer Tools project at http://hdt.incubator.apache.org.  On Thu, Nov 7, 2013 at 1:49 AM, Javi Roman  ...
   Author: Harsh J, 2013-11-06, 23:49
Re: access to hadoop cluster to post tasks remotely - Hadoop - [mail # user]
...Data in HDFS is read and written via the individual DN's 50010 ports, which you would also need to open up to avoid these errors. Data isn't written/read through the NameNode.  On Thu, ...
   Author: Harsh J, 2013-11-06, 23:48
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