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Improve IdentityMapper code for wordcount - Hadoop - [mail # user]
...Hello,One quick win could be to change this line:context.write(word, new IntWritable(val));Instead of instantiating an IntWritable on each iteration, instantiate it once as a member variable...
   Author: Chris Nauroth , 2016-08-21, 13:49
[expand - 1 more] - hfs downgrade from 2.7.2 to 2.5.0 - Hadoop - [mail # user]
...Hello Jin,1. I believe there may have been a recent bug around slow DataNode upgrade times, but I can’t find the relevant JIRA issue right now.  Perhaps someone else on the list remembe...
   Author: Chris Nauroth , 2016-08-19, 20:28
[VOTE] Release Apache Hadoop 2.7.3 RC1 - Hadoop - [mail # dev]
...Andrew, thanks for adding your perspective on this.What is a realistic strategy for us to evolve the HDFS audit log in a backward-compatible way?  If the API is essentially any form of ...
   Author: Chris Nauroth , 2016-08-18, 17:04
[HADOOP-13459] hadoop-azure runs several test cases repeatedly, causing unnecessarily long running time. - Hadoop - [issue]
...Within hadoop-azure, we have the NativeAzureFileSystemBaseTest abstract class, which defines setup and teardown to handle the Azure storage account and also defines multiple test cases. &nbs...    Author: Chris Nauroth , 2016-08-18, 07:56
Slow read from S3 on CDH 5.8.0 (includes HADOOP-12346) - Hadoop - [mail # user]
...Hello Sebastian,This is an interesting finding.  Thank you for reporting it.Are you able to share a bit more about your deployment architecture?  Are these EC2 VMs?  If so, ar...
   Author: Chris Nauroth , 2016-08-16, 19:00
Cannot run Hadoop on Windows - Hadoop - [mail # user]
...I agree with Rakesh that spaces in JAVA_HOME is likely to be a problem.  This is a known problem tracked in JIRA issue HADOOP-9600.From: Rakesh Radhakrishnan Date: Monday, August 8, 201...
   Author: Chris Nauroth , 2016-08-08, 16:26
Where do we track our Jenkins stuff - Hadoop - [mail # dev]
...Hello Sean,Thank you for bringing this up.  The lack of response could indicate that we’re not doing enough recently to maintain our Jenkins jobs.  I’m not aware of any existing up...
   Author: Chris Nauroth , 2016-08-06, 15:48
[HADOOP-12815] TestS3ContractRootDir#testRmEmptyRootDirNonRecursive and TestS3ContractRootDir#testRmRootRecursive fail on branch-2. - Hadoop - [issue]
...TestS3ContractRootDir#testRmEmptyRootDirNonRecursive and TestS3ContractRootDir#testRmRootRecursive fail on branch-2.  The tests pass on trunk....    Author: Chris Nauroth , 2016-08-01, 19:32
[DISCUSS] Retire BKJM from trunk? - Hadoop - [mail # user]
...I recommend including the BookKeeper community in this discussion.  I’ve added their user@ and dev@ lists to this thread.I do not see BKJM being used in practice.  Removing it from...
   Author: Chris Nauroth , 2016-07-27, 19:06
[expand - 1 more] - Apache MSDN Offer is Back - Hadoop - [mail # dev]
...That definitely was possible under the old deal.  You could go through the MSDN site and download an iso for various versions of Windows and run it under VirtualBox.  The MSDN site...
   Author: Chris Nauroth , 2016-07-20, 19:14