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Re: 答复: Help about build cluster on boxes which already has one? - MapReduce - [mail # user]
...What version of Hadoop are you planning on using? You will probably have to partition the resources too. e.g. If you are using 0.23 / 2.0, the NM available resources memory will have to be s...
   Author: Ravi Prakash, 2013-06-25, 15:12
Re: "could only be replicated to 0 nodes instead of minReplication" exception during job execution - MapReduce - [mail # user]
...I wonder if this is another instance of https://issues.apache.org/jira/browse/HDFS-1172 . I had noticed this behavior when I run Slive with extremely small file sizes.      __...
   Author: Ravi Prakash, 2013-06-25, 05:59
Re: MapReduce job not running - i think i keep all correct configuration. - MapReduce - [mail # user]
...Hi Pavan,  I assure you this configuration works. The problem is very likely in your configuration files. Please look them over once again. Also did you restart your daemons after chang...
   Author: Ravi Prakash, 2013-06-23, 13:34
[MAPREDUCE-3135] Unit test org.apache.hadoop.mapred.TestJobHistoryServer fails intermittently - MapReduce - [issue]
...Every once in a while org.apache.hadoop.mapred.TestJobHistoryServer fails due to a timeout....
http://issues.apache.org/jira/browse/MAPREDUCE-3135    Author: Ravi Prakash, 2013-06-05, 23:27
Re: HDFS write failures! - MapReduce - [mail # user]
...Hi,  I couldn't find any code that would relay this failure to the NN. The relevant code is in DFSOutputStream:DataStreamer:processDatanodeError()  For trunk: https://svn.apache.or...
   Author: Ravi Prakash, 2013-05-17, 18:14
[MAPREDUCE-4989] JSONify DataTables input data for Attempts page - MapReduce - [issue]
...Use deferred rendering for the attempts page as was done in MAPREDUCE-4720. I'm sorry I didn't realize earlier that this table could be huge too. Thanks to Jason Lowe for pointing it out....
http://issues.apache.org/jira/browse/MAPREDUCE-4989    Author: Ravi Prakash, 2013-04-10, 18:30
[MAPREDUCE-5074] Remove limits on number of counters and counter groups in MapReduce - MapReduce - [issue]
...Can we please consider removing limits on the number of counters and counter groups now that it is all user code? Thanks to the much better architecture of YARN in which there is no single J...
http://issues.apache.org/jira/browse/MAPREDUCE-5074    Author: Ravi Prakash, 2013-03-15, 18:22
Re: Why In-memory Mapoutput is necessary in ReduceCopier - MapReduce - [mail # dev]
...Hi Ling,  Yes! It is because of performance concerns. We want to keep and merge map outputs in memory as much as we can. The amount of memory reserved for this purpose is configurable. ...
   Author: Ravi Prakash, 2013-03-11, 16:58
[MAPREDUCE-4802] Takes a long time to load the task list on the AM for large jobs - MapReduce - [issue]
...We should turn on deferred rendering in DataTables as suggested by Luke here: https://issues.apache.org/jira/browse/YARN-151?focusedCommentId=13475811&page=com.atlassian.jira.plugin.syst...
http://issues.apache.org/jira/browse/MAPREDUCE-4802    Author: Ravi Prakash, 2013-02-06, 17:05
[MAPREDUCE-4786] Job End Notification retry interval is 5 milliseconds by default - MapReduce - [issue]
...Courtesy Steven Willis and Harsh JFrom: Harsh JI believe the configs of the latter of both of the aboveclassifications were meant to be added in as replacement names, butthe property names g...
http://issues.apache.org/jira/browse/MAPREDUCE-4786    Author: Ravi Prakash, 2013-02-06, 17:05
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