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[MAPREDUCE-5115] MR app master may try to assign a reduce priority container to a map - MapReduce - [issue]
...ScheduledRequests.assign() checks reduces.isEmpty() and releases REDUCE priority containers. But it could have received more REDUCE priority containers than reduces.size() in which case it w...
http://issues.apache.org/jira/browse/MAPREDUCE-5115    Author: Bikas Saha, 2013-03-28, 21:43
[MAPREDUCE-5107] MR AM needs to be able to handle unavailable HDFS - MapReduce - [issue]
...Stuff like not starting tasks when HDFS is unavailable. Not terminating tasks that are spinning on HDFS to become available. These features exist in branch-1 JT. Some of this may already be ...
http://issues.apache.org/jira/browse/MAPREDUCE-5107    Author: Bikas Saha, 2013-03-27, 18:34
RE: [Vote] Merge branch-trunk-win to trunk - MapReduce - [mail # dev]
...That's sounds like a reasonable approach. Like you say below, we need to ensure is that the Java side of OS specific optimizations is generic and wont need drastic surgery when that optimiza...
   Author: Bikas Saha, 2013-03-01, 17:55
[MAPREDUCE-4892] CombineFileInputFormat node input split can be skewed on small clusters - MapReduce - [issue]
...The CombineFileInputFormat split generation logic tries to group blocks by node in order to create splits. It iterates through the nodes and creates splits on them until there aren't enough ...
http://issues.apache.org/jira/browse/MAPREDUCE-4892    Author: Bikas Saha, 2013-02-28, 13:20
[MAPREDUCE-4671] AM does not tell the RM about container requests that are no longer needed - MapReduce - [issue]
...Say the AM wanted a container at hosts h1, h2, h3. After getting a container at h1 it should tell RM that it no longer needs containers at h2, h3. Otherwise on the RM h2, h3 remain valid all...
http://issues.apache.org/jira/browse/MAPREDUCE-4671    Author: Bikas Saha, 2013-02-09, 12:40
RE: How to compile the JobTracker.java - MapReduce - [mail # dev]
...The scheduling and resource management parts of the JobTracker have been put in the ResourceManager. The Map Reduce job history in the JobHistoryServer. Each MR job is managed by its own YAR...
   Author: Bikas Saha, 2012-12-18, 17:32
[MAPREDUCE-4436] AppRejectedTransition does not unregister app from master service and scheduler - MapReduce - [issue]
...AttemptStartedTransition() adds the app to the ApplicationMasterService and scheduler. when the scheduler rejects the app then AppRejectedTransition() forgets to unregister it from the Appli...
http://issues.apache.org/jira/browse/MAPREDUCE-4436    Author: Bikas Saha, 2012-10-10, 00:57
[MAPREDUCE-4657] WindowsResourceCalculatorPlugin has NPE - MapReduce - [issue]
...When Shell command execution is interrupted then WindowsResourceCalculatorPlugin has NPE.code}2012-08-31 13:01:00,140 ERROR [Thread-771] util.WindowsResourceCalculatorPlugin(69): jav...
http://issues.apache.org/jira/browse/MAPREDUCE-4657    Author: Bikas Saha, 2012-10-04, 03:48
[MAPREDUCE-4607] Race condition in ReduceTask completion can result in Task being incorrectly failed - MapReduce - [issue]
...Problem reported by chackaravarthy in MAPREDUCE-4252This problem has been handled when speculative task launched for map task and other attempt got failed (not killed)Can the similar kind of...
http://issues.apache.org/jira/browse/MAPREDUCE-4607    Author: Bikas Saha, 2012-09-12, 15:00
[MAPREDUCE-4325] Rename ProcessTree.isSetsidAvailable - MapReduce - [issue]
...The logical use of this member is to find out if processes can be grouped into a unit for process manipulation. eg. killing process groups etc.setsid is the Linux implementation and it leaks...
http://issues.apache.org/jira/browse/MAPREDUCE-4325    Author: Bikas Saha, 2012-09-12, 03:30
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