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[MAPREDUCE-5003] AM recovery should recreate records for attempts that were incomplete
...As discussed in MAPREDUCE-4992, it would be nice if the AM recovered task attempt entries for all task attempts launched by the prior app attempt even if those task attempts did not complete...
, 2015-11-02, 15:59
[MAPREDUCE-4938] Job submission to unknown queue can leave staging directory behind
...There is a race where submitting a job to an unknown queue can appear to succeed to the client and then subsequently fail later. Since there was no AM ever launched, there was nothing ...
, 2015-10-15, 22:50
[MAPREDUCE-6303] Read timeout when retrying a fetch error can be fatal to a reducer
...If a reducer encounters an error trying to fetch from a node then encounters a read timeout when trying to re-establish the connection then the reducer can fail. The read timeout excep...
, 2015-09-02, 04:13
[MAPREDUCE-5513] ConcurrentModificationException in JobControl
...JobControl.toList is locking individual lists to iterate them, but those lists can be modified elsewhere without holding the list lock. The locking approaches are mismatched, with toLi...
, 2015-06-30, 08:18
[MAPREDUCE-5656] bzip2 codec can drop records when reading data in splits
...Bzip2Codec.BZip2CompressionInputStream can cause records to be dropped when reading them in splits based on where record delimiters occur relative to compression block boundaries.Thanks to K...
, 2015-06-12, 20:59
[MAPREDUCE-4376] TestClusterMRNotification times out
...The TestClusterMRNotification test is often timing out. git bisect tests narrowed it down to MAPREDUCE-3921, as the test consistently passes before that change and times out most of th...
, 2015-05-18, 18:42
[MAPREDUCE-4020] Web services returns incorrect JSON for deep queue tree
...When the capacity scheduler is configured for more than two levels of queues, the web services API returns incorrect JSON for the subQueues field of some parent queues. The "subQueues"...
, 2015-05-12, 09:18
[MAPREDUCE-6279] AM should explicity exit JVM after all services have stopped
...Occasionally the MapReduce AM can "get stuck" trying to shut down. MAPREDUCE-6049 and MAPREDUCE-5888 were specific instances that have been fixed, but this can also occur with uber job...
, 2015-05-08, 17:08
[MAPREDUCE-4818] Easier identification of tasks that timeout during localization
...When a task is taking too long to localize and is killed by the AM due to task timeout, the job UI/history is not very helpful. The attempt simply lists a diagnostic stating it was kil...
, 2015-05-02, 06:10
[MAPREDUCE-6141] History server leveldb recovery store
...It would be nice to have a leveldb option to the job history server recovery store. Leveldb would provide some benefits over the existing filesystem store such as better support for at...
, 2015-04-25, 00:15
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