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[MAPREDUCE-486] JobTracker web UI counts COMMIT_PENDING tasks as Running - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-486    Author: Todd Lipcon, 2012-10-17, 23:30
[MAPREDUCE-2376] test-task-controller fails if run as a userid < 1000 - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-2376    Author: Todd Lipcon, 2012-10-17, 22:59
[MAPREDUCE-3394] Add log guard for a debug message in ReduceTask - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-3394    Author: Todd Lipcon, 2012-10-17, 19:27
[MAPREDUCE-2103] task-controller shouldn't require o-r permissions - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-2103    Author: Todd Lipcon, 2012-10-17, 19:27
[MAPREDUCE-1740] NPE in getMatchingLevelForNodes when node locations are variable depth - MapReduce - [issue]
...In getMatchingLevelForNodes, we assume that both nodes have the same "depth" (ie number of path components). If the user provides a topology script that assigns one node a path like /foo/bar...
http://issues.apache.org/jira/browse/MAPREDUCE-1740    Author: Todd Lipcon, 2012-10-17, 19:27
[MAPREDUCE-3278] 0.20: avoid a busy-loop in ReduceTask scheduling - MapReduce - [issue]
...Looking at profiling results, it became clear that the ReduceTask has the following busy-loop which was causing it to suck up 100% of CPU in the fetch phase in some configurations: the numbe...
http://issues.apache.org/jira/browse/MAPREDUCE-3278    Author: Todd Lipcon, 2012-10-17, 19:27
[MAPREDUCE-2073] TestTrackerDistributedCacheManager should be up-front about requirements on build environment - MapReduce - [issue]
...TestTrackerDistributedCacheManager will fail on a system where the build directory is in any path where an ancestor doesn't have a+x permissions. On one of our hudson boxes, for example, hud...
http://issues.apache.org/jira/browse/MAPREDUCE-2073    Author: Todd Lipcon, 2012-10-17, 19:27
Re: Question about namenode HA - MapReduce - [mail # user]
...Hi Liang,  Answers inline below.  On Sun, Oct 14, 2012 at 8:01 PM, 谢良  w rote:  There are a few reasons for this design choice:  1)  Like Steve said, it's easie...
   Author: Todd Lipcon, 2012-10-16, 01:24
[MAPREDUCE-782] Use PureJavaCrc32 in mapreduce spills - MapReduce - [issue]
...HADOOP-6148 implemented a Pure Java implementation of CRC32 which performs better than the built-in one. This issue is to make use of it in the mapred package...
http://issues.apache.org/jira/browse/MAPREDUCE-782    Author: Todd Lipcon, 2012-09-25, 19:00
[MAPREDUCE-3289] Make use of fadvise in the NM's shuffle handler - MapReduce - [issue]
...Using the new NativeIO fadvise functions, we can make the NodeManager prefetch map output before it's send over the socket, and drop it out of the fs cache once it's been sent (since it's ve...
http://issues.apache.org/jira/browse/MAPREDUCE-3289    Author: Todd Lipcon, 2012-09-25, 17:28
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