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Changing default scheduler in hadoop - Hadoop - [mail # user]
...Hi,On Sun, Apr 13, 2014 at 10:47 AM, Mahesh Khandewal wrote:Doing a simple 'find' in the source checkout for name pattern'Scheduler' should reveal pretty relevant hits. We do name our J...
   Author: Harsh J , 2014-04-13, 17:25
Number of map task - Hadoop - [mail # user]
...Hi,Pig applies a CombineFileInputFormat wrapper on top of the storage bydefault: http://pig.apache.org/docs/r0.12.0/perf.html#combine-filesPlease also ask Pig specific questions on its own l...
   Author: Harsh J , 2014-04-12, 12:40
InputFormat and InputSplit - Network location name contains /: - Hadoop - [mail # user]
...Do not use the InputSplit's getLocations() API to supply your filepath, it is not intended for such things, if thats what you've done inyour current InputFormat implementation.If you're look...
   Author: Harsh J , 2014-04-11, 04:17
not able to run map reduce job example on aws machine - Hadoop - [mail # user]
..."java.lang.IllegalArgumentException: Does not contain a validhost:port authority: poc_hadoop04:46162"Hostnames cannot carry an underscore '_' character per RFC 952 and itsextensions. Please ...
   Author: Harsh J , 2014-04-10, 13:41
Hadoop 2.2.0-cdh5.0.0-beta-1 - MapReduce Streaming - Failed to run on a larger jobs - Hadoop - [mail # user]
...It appears to me that whatever chunk of the input CSV files your maptask 000149 gets, the program is unable to process it and throws anerror and exits.Look into the attempt_1395628276810_006...
   Author: Harsh J , 2014-04-10, 06:32
use setrep change number of file replicas,but not work - Hadoop - [mail # user]
...The replica deletion is asynchronous. You can track its deletions viathe NameNode's over-replicated blocks and the pending delete metrics.On Thu, Apr 10, 2014 at 7:16 AM, ch huang  wrot...
   Author: Harsh J , 2014-04-10, 02:51
File requests to Namenode - Hadoop - [mail # user]
...You could look at metrics the NN publishes, or look at/process theHDFS audit log.On Wed, Apr 9, 2014 at 6:36 PM, Diwakar Sharma  wrote:Harsh J...
   Author: Harsh J , 2014-04-10, 01:23
MapReduce for complex key/value pairs? - Hadoop - [mail # user]
...Yes, you can write custom writable classes that detail and serialiseyour required data structure. If you have Hadoop: The DefinitiveGuide, checkout its section "Serialization" under chapter ...
   Author: Harsh J , 2014-04-08, 18:31
Hadoop v1.8 data transfer protocol - Hadoop - [mail # dev]
...There's been no Apache Hadoop release versioned v1.8 historically, noris one upcoming. Do you mean 0.18?Either way, can you point to the specific code lines in BlockSenderwhich have you conf...
   Author: Harsh J , 2014-04-07, 02:00
customize containter-log4j.properties - Hadoop - [mail # user]
...This is intentional, and only within MR2's scope - we do not supportconfiguring the formatting, but do support switching the levels (viajob properties). You should still be able to customise...
   Author: Harsh J , 2014-04-05, 17:14