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[MAPREDUCE-2072] Allow multiple instances of same local job to run simutaneously on the same machine - MapReduce - [issue]
...On the same (build) machine, there may be multiple instances of same local job running - e.g. same unit test from snapshot build and release build.For each build project on our build machine...
http://issues.apache.org/jira/browse/MAPREDUCE-2072    Author: Ted Yu, 2014-07-31, 00:58
[MAPREDUCE-2061] child environment substitution is broken - MapReduce - [issue]
...TaskRunner.getVMEnvironment is still broken in a couple of ways even after HADOOP-5981: It does not recognize ${VAR} notation. This is necessary if we have both "VAR" and "VAR_1" existe...
http://issues.apache.org/jira/browse/MAPREDUCE-2061    Author: Hong Tang, 2014-07-31, 00:56
[MAPREDUCE-2057] Job Tracker appears to do host access-control (mapred.hosts, mapred.hosts.exclude) based on presented name from TaskTracker - MapReduce - [issue]
...As far as I can tell, where the NameNode, in validating the dfs.hosts and dfs.hosts.exclude files uses the source IP address for the RPC connection, the JobTracker appears to use the present...
http://issues.apache.org/jira/browse/MAPREDUCE-2057    Author: Matthew Byng-Maddick, 2014-07-31, 00:52
[MAPREDUCE-2047] reduce overhead of findSpeculativeTask - MapReduce - [issue]
...We are bottlenecked (in the JT) on the jobtracker lock and calls to findSpeculativeTask frequently show up as one of the top routines (by time) called holding this lock.this routine calls ca...
http://issues.apache.org/jira/browse/MAPREDUCE-2047    Author: Joydeep Sen Sarma, 2014-07-31, 00:46
[MAPREDUCE-2045] [Gridmix] Separate out the -generate option in Gridmix - MapReduce - [issue]
...Currently, the data generating option (-generate) is embedded in the main GridMix command. This is very confusing and needs to separated out as a full-fledged option....
http://issues.apache.org/jira/browse/MAPREDUCE-2045    Author: Amar Kamat, 2014-07-31, 00:45
[MAPREDUCE-2044] [Gridmix] Document the usage of '-' as the input-trace in GridMix - MapReduce - [issue]
...GridMix users can pipeline the input trace to GridMix using the '-' option. This needs a documentation....
http://issues.apache.org/jira/browse/MAPREDUCE-2044    Author: Amar Kamat, 2014-07-31, 00:45
[MAPREDUCE-2041] TaskRunner logDir race condition leads to crash on job-acl.xml creation - MapReduce - [issue]
...TaskRunner's prepareLogFiles() warns on mkdirs() failures but ignores them.  It also fails even to check the return value of setPermissions().  Either one can fail (e.g., on NFS, w...
http://issues.apache.org/jira/browse/MAPREDUCE-2041    Author: Greg Roelofs, 2014-07-31, 00:42
[MAPREDUCE-1652] Tasks need to emit a better error message when job-acls.xml file cannot be created - MapReduce - [issue]
...If task cannot create job-acls.xml in userlogs/$jobid/task-attempt-dir(because of disc being full, OR disc has gone bad, etc), then task should emit a better error message instead of failing...
http://issues.apache.org/jira/browse/MAPREDUCE-1652    Author: Ravi Gummadi, 2014-07-31, 00:42
[MAPREDUCE-2039] Improve speculative execution - MapReduce - [issue]
...In speculation, the framework issues a second task attempt on a task where one attempt is already running.  This is useful if the running attempt is bogged down for reasons outside of t...
http://issues.apache.org/jira/browse/MAPREDUCE-2039    Author: Dick King, 2014-07-31, 00:38
[MAPREDUCE-2019] Add  targets for gridmix unit and system tests in a gridmix build xml file. - MapReduce - [issue]
...Add the targets for both unit and system tests in gridmix build xml (src/contrib/gridmix/build.xml). The target name for system tests would be 'test-system' and same way the target name for ...
http://issues.apache.org/jira/browse/MAPREDUCE-2019    Author: Vinay Kumar Thota, 2014-07-31, 00:33
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