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[HADOOP-10759] Remove hardcoded JAVA_HEAP_MAX in hadoop-config.sh - Hadoop - [issue]
...In hadoop-common-project/hadoop-common/src/main/bin/hadoop-config.sh, there is a hard code for Java parameter: 'JAVA_HEAP_MAX=-Xmx1000m'. It should be removed....
http://issues.apache.org/jira/browse/HADOOP-10759    Author: sam liu, 2014-06-30, 05:53
Re: File Permission Issue using Distributed Cache of Hadoop-2.2.0 - Hadoop - [mail # user]
...My colleague found distcp tool does miss execution permission as well.I also found some difference between hadoop 1.x and hadoop 2.x:- On Hadoop 2.2.0, I can use command 'hadoop dfs -chmod 7...
[+ more]    Author: sam liu, 2014-05-31, 03:28
Re: Failed to run 'mvn package' on hadoop-2.2 using Cygwin - Hadoop - [mail # user]
...Hi Jason,Actually the classpath/path of my linux OS in Cygwin include theprotoc-2.5.0-win32/protoc.exe file...2014-05-23 21:30 GMT+08:00 Jason Hubbard : ...
[+ more]    Author: sam liu, 2014-05-24, 08:52
Questions about Hadoop logs and mapred.local.dir - Hadoop - [mail # user]
...Hi Experts,1. The size of mapred.local.dir is big(30 GB), how many methods could cleanit correctly?2. For logs of NameNode/DataNode/JobTracker/TaskTracker, are they allrolling type log? What...
   Author: sam liu, 2014-05-16, 13:50
Re: For QJM HA solution, after failover, application must update NameNode IP? - Hadoop - [mail # user]
...Hi Bryan,Thanks for your detailed response!- 'you use a logical name for your "group of namenodes"': In your case, itshould be 'MYCLUSTER'- 'provide a means for the client to handle connecti...
[+ more]    Author: sam liu, 2014-04-29, 14:08
Re: What codes to chmod 755 to "yarn.nodemanager.log-dirs"? - Hadoop - [mail # user]
...My version is 2.1.0 and the cluster uses DefaultContainerExecutor. Is itpossible that DefaultContainerExecutor change the permission of existingnodemanager log-dir to 755?2014-04-25 0:54 GMT...
[+ more]    Author: sam liu, 2014-04-25, 15:43
Re: Differences between HistoryServer and Yarn TimeLine server? - Hadoop - [mail # user]
...Zhijie,I am much clear now. Thanks a lot!As my understanding, besides previous Job History Server, hadoop now has anew timeline server which could restore both the generic YARN applicationhi...
[+ more]    Author: sam liu, 2014-04-24, 03:16
Re: Why block sizes shown by 'fsck' and '-stat' are inconsistent? - Hadoop - [mail # user]
...Thanks for your comments!As I mentioned HDFS use only what it needs on the local file system. Forexample, a 16 KB hdfs file only use 16 KB local file system storage, not 64MB(its hdfs block ...
[+ more]    Author: sam liu, 2014-04-05, 14:06
Re: How to submit the patch MAPREDUCE-4490.patch which works for branch-1.2, not trunk? - Hadoop - [mail # user]
...Hi Arpit,Thanks for your guide!  As a new contributor, I still have following twoquestions need your help:1) So I guess I should run 'test-patch.sh' on my local environment againstbranc...
[+ more]    Author: sam liu, 2014-02-16, 08:54
Any method to get input splits by column? - Hadoop - [mail # user]
...Hi,  By default, MR inputformat classes break input file into splits by rows. However, we have a specilal requirement on MR app: get input splits by column.  Is there any good meth...
   Author: sam liu, 2013-12-23, 13:37
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