Arun C Murthy
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[MAPREDUCE-4252] MR2 job never completes with 1 pending task
...This was found by ATM:I ran a teragen with 1000 map tasks. Many task attempts failed, but after 999 of the tasks had completed, the job is now sitting forever with 1 task "pending"....
, 2012-08-29, 21:30
[MAPREDUCE-3542] Support "FileSystemCounter" legacy counter group name for compatibility
...The group name changed from "FileSystemCounter" to "org.apache.hadoop.mapreduce.FileSystemCounter", but we should support the old one for compatibility's sake. This came up in PIG-2347....
, 2012-08-13, 08:10
[MAPREDUCE-4257] Support fair-sharing option within a MR2 Capacity Scheduler queue
...The fair scheduler can run jobs in a single pool (queue) in FIFO or fair share mode. In FIFO mode one job runs at a time, in priority order, while in fair share mode multiple jobs can run at...
, 2012-07-12, 01:33
[MAPREDUCE-3871] Allow symlinking in LocalJobRunner DistributedCache
...Currently the LocalJobRunner doesn't create symlinks for files in the DistributedCache. It is safe to create symlinks if files of the same name don't exist. LocalJobRunner should also delete...
, 2012-07-05, 12:37
[MAPREDUCE-2338] Deprecate field selection methods on JobConf
...KeyFieldBasedComparator and KeyFieldBasedPartitioner are libraries so should not appear as getters and setters in JobConf. For the new API there are getters and setters on KeyFieldBasedCompa...
, 2012-06-30, 17:16
[MAPREDUCE-4337] Support multiple reducers in 'uber' jobs
...This is MAPREDUCE-434 for 'uber' jobs (jobs that run in the same container as the AM)....
, 2012-06-12, 02:24
[MAPREDUCE-4148] MapReduce should not have a compile-time dependency on HDFS
...MapReduce depends on HDFS's DelegationTokenIdentifier (for printing token debug information). We should remove this dependency and MapReduce's compile-time dependency on HDFS....
, 2012-05-16, 05:55
[MAPREDUCE-4226] ConcurrentModificationException in FileSystemCounterGroup
...This was seen in a Hive job. I'll attach a failing test case....
, 2012-05-08, 14:03
[MAPREDUCE-4230] Ensure framework counter group synchronization is correct for serialization/deserialization
...FrameworkCounterGroup and FileSystemCounterGroup may be susceptible to a race outlined in https://issues.apache.org/jira/browse/MAPREDUCE-4226?focusedCommentId=13269657&page=com.atlassia...
, 2012-05-07, 19:13
[MAPREDUCE-4217] Task commit waits for up to 3 seconds
...Following MAPREDUCE-2450, TaskReporter#stopCommunicationThread may wait up to 3 seconds (the value of PROGRESS_INTERVAL) before it returns. This can be noticeable for short running tasks....
, 2012-05-01, 21:48
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