Vinod Kumar Vavilapalli
Arun C Murthy
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Pedro Sá da Costa
Brahma Reddy Battula
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[MAPREDUCE-3978] getTotalMaps, getTotalReduces is incorrect for JobHistory PartialJob
...These are currently returning the number of completed map / reduce tasks - instead of the total. The information doesn't make it over to the history server via the job history file name....
, 2012-03-08, 18:16
[MAPREDUCE-3961] Map/ReduceSlotMillis computation incorrect
...Map/ReduceSlot millis are currently computed based on a fixed container size. They should instead be based on the minimum container size offered by the cluster.There's another jira to rename...
, 2012-03-07, 13:25
[MAPREDUCE-3979] DelegationTokens will be renewed forever if multiple jobs share tokens and the first one sets JOB_CANCEL_DELEGATION_TOKEN to false
...The first Job/App to register a token is the one which DelegationTokenRenewer associates with a a specific Token. An attempt to remove/cancel these shared tokens by subsequent jobs doesn't w...
, 2012-03-07, 01:42
[MAPREDUCE-3710] last split generated by FileInputFormat.getSplits may not have the best locality
...The last split generated by FileInputFormat.getSplits considers blkLocations.length-1 to be the hosts for the split.The last split may be larger than the rest (SPLIT_SLOP=1.1 by default) - i...
, 2012-03-05, 02:49
[MAPREDUCE-3511] Counters occupy a good part of AM heap
...Per task counters seem to be occupying a good part of an AMs heap. Looks like more than 50% of what's used by a TaskAttemptImpl object.This could be optimized by interning strings or possibl...
, 2012-03-05, 02:49
[MAPREDUCE-3901] lazy load JobHistory Task and TaskAttempt details
...The job history UI and MRClientProtocol calls routed via JobHistory are very slow for large jobs. Some of this time is spent parsing the history file. A good chunk is spent pre-creating lots...
, 2012-03-04, 00:29
[MAPREDUCE-3298] Improvements to the aggregated log format
...allow easier access to different log types. store information about containers which may have been skipped because of the aggregation policy. add a comparatoretc....
, 2012-02-26, 05:44
[MAPREDUCE-3489] EventDispatcher should have a call-back on errors for aiding tests
...If one of the dispatched events generates an exception - the dispatcher kills the JVM via a System.exit. Unit tests end up not running - but they don't fail either.TestTaskAttempt is current...
, 2012-02-26, 05:30
[MAPREDUCE-3711] AppMaster recovery for Medium to large jobs take long time
...Reported by Karam Singhyarn.resourcemanager.am.max-retries=2Ran test cases with sort job on 350 scale having 16800 maps and 680 reduces -:1. After 70 secs of Job Sumbission Am is killed usin...
, 2012-02-05, 21:26
[MAPREDUCE-3640] AMRecovery should pick completed task form partial JobHistory files
...Currently, if the JobHistory file has a partial record, AMRecovery will start from scratch. This will become more relevant after MAPREDUCE-3512....
, 2012-02-02, 14:19
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