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Re: Container Launching - MapReduce - [mail # user]
...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...
   Author: Vinod Kumar Vavilapalli, 2012-01-10, 23:58
Re: Container launch from appmaster - MapReduce - [mail # user]
...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...
   Author: Vinod Kumar Vavilapalli, 2012-01-10, 23:51
Re: Yarn Container Limit - MapReduce - [mail # user]
...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...
   Author: Vinod Kumar Vavilapalli, 2012-01-10, 23:40
[MAPREDUCE-3569] TaskAttemptListener holds a global lock for all task-updates - MapReduce - [issue]
...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....
http://issues.apache.org/jira/browse/MAPREDUCE-3569    Author: Vinod Kumar Vavilapalli, 2012-01-05, 13:22
[MAPREDUCE-3572] MR AM's dispatcher is blocked by heartbeats to ResourceManager - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-3572    Author: Vinod Kumar Vavilapalli, 2012-01-05, 13:22
[MAPREDUCE-3566] MR AM slows down due to repeatedly constructing ContainerLaunchContext - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-3566    Author: Vinod Kumar Vavilapalli, 2012-01-05, 13:22
[MAPREDUCE-62] job.xml should have high replication factor by default - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-62    Author: Vinod Kumar Vavilapalli, 2011-12-31, 09:54
[MAPREDUCE-43] Retired jobs are not present in the job list returned to the job-client. - MapReduce - [issue]
...After mapred.jobtracker.retirejob.interval elapses, completed jobs are no longer maintained by the JT, but instead when job-client ask for job status, counters or task completion events, the...
http://issues.apache.org/jira/browse/MAPREDUCE-43    Author: Vinod Kumar Vavilapalli, 2011-12-31, 09:30
[MAPREDUCE-48] Expired launching tasks affect small jobs' execution time - MapReduce - [issue]
...Currently when a task is given to a TT, the JT doesn't mark the task as running till the TT responds back to the JT. And within 10 mins(hard-coded), if the task doesn't come back, then only ...
http://issues.apache.org/jira/browse/MAPREDUCE-48    Author: Vinod Kumar Vavilapalli, 2011-12-31, 09:20
[MAPREDUCE-29] JVM reuse across task types - MapReduce - [issue]
...Currently, JVM-reuse is across tasks of same type of the same job, i.e. JVMs are kind of marked as map-JVMs and reduce JVMs. May be we can reuse JVMs across tasks of different types but of t...
http://issues.apache.org/jira/browse/MAPREDUCE-29    Author: Vinod Kumar Vavilapalli, 2011-12-31, 09:12
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