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[MAPREDUCE-5213] Re-assess TokenCache methods marked @Private - MapReduce - [issue]
...While looking at the source, noticed that TokenCache#loadTokens methods are marked @Private but not used anywhere. We should either remove those methods or mark them Public or LimitedPrivate...
http://issues.apache.org/jira/browse/MAPREDUCE-5213    Author: Karthik Kambatla, 2013-08-27, 23:22
Re: why FairScheduler prefer to schedule MR jobs into the same node? - MapReduce - [mail # user]
...It is possible that you have assignMultiple set to true in your fair scheduler configuration - that leads to assigning as many tasks on a single node heartbeat as the node can accommodate. S...
   Author: Karthik Kambatla, 2013-08-09, 21:48
[MAPREDUCE-5364] Deadlock between RenewalTimerTask methods cancel() and run() - MapReduce - [issue]
...MAPREDUCE-4860 introduced a local variable cancelled in RenewalTimerTask to fix the race where DelegationTokenRenewal attempts to renew a token even after the job is removed. However, the pa...
http://issues.apache.org/jira/browse/MAPREDUCE-5364    Author: Karthik Kambatla, 2013-08-04, 09:23
[MAPREDUCE-4860] DelegationTokenRenewal attempts to renew token even after a job is removed - MapReduce - [issue]
...mapreduce.security.token.DelegationTokenRenewal synchronizes on removeDelegationToken, but fails to synchronize on addToken, and renewing tokens in run().This inconsistency is exposed by fre...
http://issues.apache.org/jira/browse/MAPREDUCE-4860    Author: Karthik Kambatla, 2013-07-11, 21:30
[MAPREDUCE-4707] Add a comment to explain why FairScheduler#dump()'s body is synchronized on eventLog - MapReduce - [issue]
...FairScheduler#dump() is a synchronized method. In addition to that, the entire method body is in a synchronized block on eventLog. However, there is no other portion of the code that tries t...
http://issues.apache.org/jira/browse/MAPREDUCE-4707    Author: Karthik Kambatla, 2013-06-07, 04:49
[MAPREDUCE-5250] Searching for ';' in JobTracker History throws ArrayOutOfBoundException - MapReduce - [issue]
...Searching for ';' in JobTracker History throws ArrayOutOfBoundException Problem accessing /jobhistoryhome.jsp. Reason:    0Caused by:java.lang.ArrayIndexOutOfBoundsException: ...
http://issues.apache.org/jira/browse/MAPREDUCE-5250    Author: Karthik Kambatla, 2013-06-03, 19:02
[MAPREDUCE-4394] ReduceTask.MapOutputCopier.copyOutput() signature doesn't match the corresponding Javadoc - MapReduce - [issue]
http://issues.apache.org/jira/browse/MAPREDUCE-4394    Author: Karthik Kambatla, 2013-05-30, 17:20
Re: [VOTE] Plan to create release candidate for 0.23.8 - MapReduce - [mail # dev]
...+1 (non-binding)   On Mon, May 20, 2013 at 11:13 AM, Siddharth Seth wrote:  ...
   Author: Karthik Kambatla, 2013-05-20, 19:49
[MAPREDUCE-4806] Cleanup: Some (5) private methods in JobTracker.RecoveryManager are not used anymore after MAPREDUCE-3837 - MapReduce - [issue]
...MAPREDUCE-3837 re-organized the job recovery code, moving out the code that was using the methods in RecoveryManager.Now, the following methods in {{JobTracker.RecoveryManager}}seem to be un...
http://issues.apache.org/jira/browse/MAPREDUCE-4806    Author: Karthik Kambatla, 2013-05-15, 06:16
[MAPREDUCE-4385] FairScheduler.maxTasksToAssign() should check for fairscheduler.assignmultiple.maps < TaskTracker.availableSlots - MapReduce - [issue]
...FairScheduler.maxTasksToAssign() can potentially return a value greater than the available slots. Currently, we rely on canAssignMaps()/canAssignReduces() to reject such requests.These addit...
http://issues.apache.org/jira/browse/MAPREDUCE-4385    Author: Karthik Kambatla, 2013-05-15, 06:16
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