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[MAPREDUCE-2323] Add metrics to the fair scheduler - MapReduce - [issue]
...It would be useful to be able to monitor various metrics in the fair scheduler, like demand, fair share, min share, and running task count....
http://issues.apache.org/jira/browse/MAPREDUCE-2323    Author: Todd Lipcon, 2011-11-15, 00:48
[MAPREDUCE-3190] bin/yarn should barf early if HADOOP_COMMON_HOME or HADOOP_HDFS_HOME are not set - MapReduce - [issue]
...Currently, if these env vars are not set when you run bin/yarn, it will crash with various ClassNotFoundExceptions, having added /share/hadoop/hdfs to the classpath. Rather, we should check ...
http://issues.apache.org/jira/browse/MAPREDUCE-3190    Author: Todd Lipcon, 2011-11-15, 00:48
[MAPREDUCE-3161] Improve javadoc and fix some typos in MR2 code - MapReduce - [issue]
...Just some simple cleanup, documentation, typos in variable names, etc. The only code change is to refactor ResourceLocalizationService so each event type is handled in its own method instead...
http://issues.apache.org/jira/browse/MAPREDUCE-3161    Author: Todd Lipcon, 2011-11-15, 00:48
[MAPREDUCE-3188] Lots of errors in logs when daemon startup fails - MapReduce - [issue]
...Since the MR2 daemons are made up of lots of component services, if one of those components fails to start, it will cause the others to shut down as well, even if they haven't fully finished...
http://issues.apache.org/jira/browse/MAPREDUCE-3188    Author: Todd Lipcon, 2011-11-15, 00:48
[MAPREDUCE-3189] Add link decoration back to MR2's CSS - MapReduce - [issue]
...I found the MRv2 web UI very difficult to use because it's not clear which items are links and which aren't. I'd like to change the CSS so that links are underlined, making it easier to see ...
http://issues.apache.org/jira/browse/MAPREDUCE-3189    Author: Todd Lipcon, 2011-11-15, 00:48
[MAPREDUCE-3252] MR2: Map tasks rewrite data once even if output fits in sort buffer - MapReduce - [issue]
...I found that, even if the output of a map task fits entirely in its sort buffer, it was rewriting the output entirely rather than just renaming the first spill into place. This is due to Raw...
http://issues.apache.org/jira/browse/MAPREDUCE-3252    Author: Todd Lipcon, 2011-11-15, 00:48
[MAPREDUCE-3187] Add names for various unnamed threads in MR2 - MapReduce - [issue]
...Simple patch to add thread names for all the places we use Executors, etc....
http://issues.apache.org/jira/browse/MAPREDUCE-3187    Author: Todd Lipcon, 2011-11-15, 00:48
[MAPREDUCE-2331] Add coverage of task graph servlet to fair scheduler system test - MapReduce - [issue]
...Would be useful to hit the TaskGraph servlet in the fair scheduler system test. This way, when run under JCarder, it will check for any lock inversions in this code....
http://issues.apache.org/jira/browse/MAPREDUCE-2331    Author: Todd Lipcon, 2011-11-15, 00:48
[MAPREDUCE-2882] TestLineRecordReader depends on ant jars - MapReduce - [issue]
...This test is currently importing an ant utility class to read a file - this dependency doesn't work in mavenized land....
http://issues.apache.org/jira/browse/MAPREDUCE-2882    Author: Todd Lipcon, 2011-11-15, 00:48
[MAPREDUCE-2311] TestFairScheduler failing on trunk - MapReduce - [issue]
...Most of the test cases in this test are failing on trunk, unclear how long since the contrib tests weren't running while the core tests were failed....
http://issues.apache.org/jira/browse/MAPREDUCE-2311    Author: Todd Lipcon, 2011-11-15, 00:48
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