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[MAPREDUCE-3714] Reduce hangs in a corner case - MapReduce - [issue]
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...Karam Singh found this long time back and we(Sid/I) ran into this again.Logs to follow.....
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http://issues.apache.org/jira/browse/MAPREDUCE-3714
Author: Vinod Kumar Vavilapalli,
2012-01-25, 15:00
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Re: How is MRv2 fundamentally changed? - MapReduce - [mail # dev]
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...On Mon, Jan 23, 2012 at 5:11 PM, Jie Li wrote: The task run time hasn't changed from 0.21/0.22. But it has changed if you compare with 0.20, the new runtime has a lot of perform...
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Author: Vinod Kumar Vavilapalli,
2012-01-24, 05:02
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[MAPREDUCE-3382] Network ACLs can prevent AMs to ping the Job-end notification URL - MapReduce - [issue]
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...MAPREDUCE-3028 added support for job-end notification from MR AMs after the job finishes. Network ACLs can have an implication on this one - outgoing connections from the compute nodes may b...
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http://issues.apache.org/jira/browse/MAPREDUCE-3382
Author: Vinod Kumar Vavilapalli,
2012-01-11, 13:22
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Re: Container Launching - MapReduce - [mail # user]
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...This seems like a code bug, following your conversation. Raghavendra/Bing, can one of you please create a ticket at https://issues.apache.org/jira/secure/CreateIssue!default.jspa under...
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Author: Vinod Kumar Vavilapalli,
2012-01-10, 23:58
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Re: Container launch from appmaster - MapReduce - [mail # user]
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...Yes, you can. http://hadoop.apache.org/common/docs/r0.23.0/hadoop-yarn/hadoop-yarn-site/WritingYarnApplications.html#Writing_an_ApplicationMaster should give you a very good idea and e...
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Author: Vinod Kumar Vavilapalli,
2012-01-10, 23:51
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Re: Yarn Container Limit - MapReduce - [mail # user]
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...You can use yarn.nodemanager.resource.memory-mb to set the limit on each NodeManager. You should have a good look at http://hadoop.apache.org/common/docs/r0.23.0/hadoop-yarn/hadoop-yar...
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Author: Vinod Kumar Vavilapalli,
2012-01-10, 23:40
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[MAPREDUCE-3569] TaskAttemptListener holds a global lock for all task-updates - MapReduce - [issue]
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...This got added via MAPREDUCE-3274. We really don't need the lock if we just implement what I mentioned on that ticket here.This has performance implications on MR AM with lots of tasks....
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http://issues.apache.org/jira/browse/MAPREDUCE-3569
Author: Vinod Kumar Vavilapalli,
2012-01-05, 13:22
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[MAPREDUCE-3572] MR AM's dispatcher is blocked by heartbeats to ResourceManager - MapReduce - [issue]
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...All the heartbeat processing is done in RMContainerAllocator locking the object. The event processing is also locked on this, causing the dispatcher to be blocked and the rest of the AM gett...
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http://issues.apache.org/jira/browse/MAPREDUCE-3572
Author: Vinod Kumar Vavilapalli,
2012-01-05, 13:22
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[MAPREDUCE-3566] MR AM slows down due to repeatedly constructing ContainerLaunchContext - MapReduce - [issue]
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...The construction of the context is expensive, includes per-task trips to NameNode for obtaining the information about job.jar, job splits etc which is redundant across all tasks.We should ha...
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http://issues.apache.org/jira/browse/MAPREDUCE-3566
Author: Vinod Kumar Vavilapalli,
2012-01-05, 13:22
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[MAPREDUCE-62] job.xml should have high replication factor by default - MapReduce - [issue]
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...job.xml is set the default replication factor of 3 by the JobClient. The same config file is accessed from the DFS by JT as well as all the TTs. Hence it should be set a high replication fac...
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http://issues.apache.org/jira/browse/MAPREDUCE-62
Author: Vinod Kumar Vavilapalli,
2011-12-31, 09:54
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