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Re: What else can be built on top of YARN. - HDFS - [mail # user]
... Historically, many applications/frameworks wanted to take advantage of just the resource management capabilities and failure handling of Hadoop (via JobTracker/TaskTracker), but were f...
   Author: Vinod Kumar Vavilapalli, 2013-05-30, 05:16
Re: Cannot communicate - HDFS - [mail # dev]
...It means what it says: that hadoop native library isn't available for some reason. See http://hadoop.apache.org/docs/stable/native_libraries.html  Thanks, +Vinod Kumar Vavilapalli Horto...
   Author: Vinod Kumar Vavilapalli, 2013-04-22, 17:02
[expand - 1 more] - Re: Auto clean DistCache? - HDFS - [mail # user]
...All the files are not opened at the same time ever, so you shouldn't see any "# of open files exceeds error".  Thanks, +Vinod Kumar Vavilapalli Hortonworks Inc. http://hortonworks.com/ ...
   Author: Vinod Kumar Vavilapalli, 2013-03-26, 20:44
Re: Regarding: Merging two hadoop clusters - HDFS - [mail # user]
...Copy data into one of the clusters using distcp *without* downtime (assuming you have enough capacity) and then merge the clusters?  Thanks, +Vinod Kumar Vavilapalli Hortonworks Inc. ht...
   Author: Vinod Kumar Vavilapalli, 2013-03-14, 06:46
Re: SequenceFile.createWriter - throws FileNotFoundException - HDFS - [mail # user]
...As it clearly says, check the file permissions of your input directory (* /hama/input/center/*). Also whether you want the input on local file-sytem or DFS.  +Vinod   On Fri, Feb 1...
   Author: Vinod Kumar Vavilapalli, 2013-02-01, 21:01
Re: Hadoop-Yarn-MR reading InputSplits and processing them by the RecordReader, architecture/design question. - HDFS - [mail # user]
...You got that mostly right. And it doesn't differ much in Hadoop 1.* either. With MR AM doing the work that was earlier done in JobTracker., the JobClient and the task side doesn't change muc...
   Author: Vinod Kumar Vavilapalli, 2013-02-01, 20:58
Re: Selecting a task for the tasktracker - HDFS - [mail # user]
...On top of that, the message indicates that you need to have your scheduler class in the mapred package.  Thanks, +Vinod Kumar Vavilapalli Hortonworks Inc. http://hortonworks.com/  ...
   Author: Vinod Kumar Vavilapalli, 2012-12-27, 18:11
Re: Stop at CallObjectMethod when daemon running - HDFS - [mail # user]
...Not familiar with your apr stuff, but you should capture getJobStatus() method instead of getAllJobs(). getJobStatus() is what is called for individual jobs, getAllJobs() is called only when...
   Author: Vinod Kumar Vavilapalli, 2012-12-10, 19:02
Re: "attempt*" directories in user logs - HDFS - [mail # user]
...MR launches multiple attempts for single Task in case of TaskAttempt failures or when speculative execution is turned on. In either case, a given Task will only ever have one successful Task...
   Author: Vinod Kumar Vavilapalli, 2012-12-10, 18:49
Re: Start time, end time, and task tracker of individual tasks of a job - HDFS - [mail # user]
...Most of this information is already available in the JobHistory files. And there are parsers to read from these files.  HTH +Vinod Kumar Vavilapalli Hortonworks Inc. http://hortonworks....
   Author: Vinod Kumar Vavilapalli, 2012-11-20, 18:43
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