Vinod Kumar Vavilapalli
Arun C Murthy
Robert Joseph Evans
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[MAPREDUCE-3951] Tasks are not evenly spread throughout cluster in MR2
...In MR1 (at least with the fair and fifo schedulers), if you submit a job that needs fewer resources than the cluster can provide, the tasks are spread relatively evenly across the node. For ...
, 2013-04-02, 23:10
[MAPREDUCE-2760] mapreduce.jobtracker.split.metainfo.maxsize typoed in mapred-default.xml
...The configuration mapreduce.jobtracker.split.metainfo.maxsize is incorrectly included in mapred-default.xml as mapreduce.job.split.metainfo.maxsize. It seems that jobtracker is correct, sinc...
, 2013-03-26, 17:12
[MAPREDUCE-1119] When tasks fail to report status, show tasks's stack dump before killing
...When the TT kills tasks that haven't reported status, it should somehow gather a stack dump for the task. This could be done either by sending a SIGQUIT (so the dump ends up in stdout) or pe...
, 2013-03-02, 18:10
[MAPREDUCE-2374] "Text File Busy" errors launching MR tasks
...Some very small percentage of tasks fail with a "Text file busy" error.The following was the original diagnosis:Our use of PrintWriter in TaskController.writeCommand is unsafe, since that cl...
, 2013-02-07, 04:29
[MAPREDUCE-3267] MR2 reduce tasks showing >100% complete
...My job is currently showing >100% reduce completion. Some reduce tasks are much higher than 100% complete. they appear to be in the "last merge pass" stage...
, 2013-01-28, 23:03
[MAPREDUCE-4221] Remove jquery theming support
...As of today we have 9.4MB of JQuery themes in our code tree. In addition to being a waste of space, it's a highly questionable feature. I've never heard anyone complain that the Hadoop inter...
, 2012-11-13, 20:44
[MAPREDUCE-486] JobTracker web UI counts COMMIT_PENDING tasks as Running
...In jobdetails.jsp, tasks in COMMIT_PENDING state are listed as "Running". I propose creating another column in this table for COMMIT_PENDING tasks, since users find it confusing that a given...
, 2012-10-17, 23:30
[MAPREDUCE-2376] test-task-controller fails if run as a userid < 1000
...test-task-controller tries to verify that the task-controller won't run on behalf of users with uid < 1000. This makes the test fail when running in some test environments - eg our hudson...
, 2012-10-17, 22:59
[MAPREDUCE-3394] Add log guard for a debug message in ReduceTask
...There's a LOG.debug message in ReduceTask that stringifies a task ID and uses a non-negligible amount of CPU in some cases. We should guard it with isDebugEnabled...
, 2012-10-17, 19:27
[MAPREDUCE-2103] task-controller shouldn't require o-r permissions
...The task-controller currently checks that "other" users don't have read permissions. This is unnecessary - we just need to make it's not executable. The debian policy manual explains it well...
, 2012-10-17, 19:27
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