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Re: In the constructor of JobInProgress, why is it safe to call FileSyste.closeAllForUGI(). - MapReduce - [mail # dev]
...Hey Xiao, iirc, the ugi will be different for the second ec2-user's job submission. So they should not interfere...  On Mar 22, 2013 8:05 AM, "Xiao Yu"  wrote:  ...
   Author: Devaraj Das, 2013-03-29, 15:08
[MAPREDUCE-1938] Ability for having user's classes take precedence over the system classes for tasks' classpath - MapReduce - [issue]
...It would be nice to have the ability in MapReduce to allow users to specify for their jobs alternate implementations of classes that are already defined in the MapReduce libraries. For examp...
http://issues.apache.org/jira/browse/MAPREDUCE-1938    Author: Devaraj Das, 2013-03-26, 08:06
[MAPREDUCE-482] Each shuffle should proceed as a DFA - MapReduce - [issue]
...The shuffle code (for fetching map outputs) should proceed as a DFA. The states (as Owen had mentioned on HADOOP-1183) are (INITIAL, LOCATED, FETCHING, DONE, FAILED). This is to ensure corre...
http://issues.apache.org/jira/browse/MAPREDUCE-482    Author: Devaraj Das, 2012-07-10, 03:48
[MAPREDUCE-2452] Delegation token cancellation shouldn't hold global JobTracker lock - MapReduce - [issue]
...Currently, when the JobTracker cancels a job's delegation token (at the end of the job), it holds the global lock. This is not desired....
http://issues.apache.org/jira/browse/MAPREDUCE-2452    Author: Devaraj Das, 2012-06-05, 13:53
[MAPREDUCE-3885] Apply the fix similar to HADOOP-8084 - MapReduce - [issue]
...Apply the fix similar to HADOOP-8084...
http://issues.apache.org/jira/browse/MAPREDUCE-3885    Author: Devaraj Das, 2012-03-28, 07:42
[MAPREDUCE-490] Allow printing of TaskEvents for a Job from command line - MapReduce - [issue]
...It might make sense to have these commands:bin/hadoop job -numEvents <job_id> : this will print the number of events that the job generated so farbin/hadoop job <fromEvent> <m...
http://issues.apache.org/jira/browse/MAPREDUCE-490    Author: Devaraj Das, 2012-01-16, 10:35
[MAPREDUCE-1532] Delegation token is obtained as the superuser - MapReduce - [issue]
...When the UserGroupInformation.doAs is invoked for proxy users, the delegation token is incorrectly obtained as the real user....
http://issues.apache.org/jira/browse/MAPREDUCE-1532    Author: Devaraj Das, 2011-12-12, 06:20
[MAPREDUCE-1354] Incremental enhancements to the JobTracker for better scalability - MapReduce - [issue]
...It'd be nice to have the JobTracker object not be locked while accessing the HDFS for reading the jobconf file and while writing the jobinfo file in the submitJob method. We should see if we...
http://issues.apache.org/jira/browse/MAPREDUCE-1354    Author: Devaraj Das, 2011-12-12, 06:19
[MAPREDUCE-1505] Cluster class should create the rpc client only when needed - MapReduce - [issue]
...It will be good to have the org.apache.hadoop.mapreduce.Cluster create the rpc client object only when needed (when a call to the jobtracker is actually required). org.apache.hadoop.mapreduc...
http://issues.apache.org/jira/browse/MAPREDUCE-1505    Author: Devaraj Das, 2011-12-12, 06:19
[MAPREDUCE-1900] MapReduce daemons should close FileSystems that are not needed anymore - MapReduce - [issue]
...Related to HADOOP-6843, this jira is to make MapReduce behave better with respect to closing FileSystems when they are not needed anymore....
http://issues.apache.org/jira/browse/MAPREDUCE-1900    Author: Devaraj Das, 2011-12-12, 06:19
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