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[MAPREDUCE-3] Set mapred.child.ulimit automatically to the value of the RAM limits for a job, if they are set - MapReduce - [issue]
...Memory based monitoring and scheduling allow users to set memory limits for the tasks of their jobs. This parameter is the total memory taken by the task, and any children it may launch (for...
http://issues.apache.org/jira/browse/MAPREDUCE-3    Author: Hemanth Yamijala, 2014-07-22, 22:12
[MAPREDUCE-537] Instrument events in the capacity scheduler for collecting metrics information - MapReduce - [issue]
...We need to instrument various events in the capacity scheduler so that we can collect metrics about them. This data will help us determine improvements to scheduling strategies itself....
http://issues.apache.org/jira/browse/MAPREDUCE-537    Author: Hemanth Yamijala, 2014-07-22, 21:20
[MAPREDUCE-168] mapred job -list all should display the code for Killed also. - MapReduce - [issue]
...mapred job -list all shows a legend for the states: PREP, SUCCEEDED, FAILED and RUNNING. It should also display the state for KILLED (as 5)....
http://issues.apache.org/jira/browse/MAPREDUCE-168    Author: Hemanth Yamijala, 2014-07-22, 20:22
[MAPREDUCE-411] Inconsistent strings for job and queue related scheduling information in UI when the information is not available. - MapReduce - [issue]
...HADOOP-3930 added support for displaying queue related and job related scheduling information. When this information is not available, it is displayed as 'N/A' in some cases and 'NA' in some...
http://issues.apache.org/jira/browse/MAPREDUCE-411    Author: Hemanth Yamijala, 2014-07-21, 22:55
[MAPREDUCE-330] Log information regarding changes to job in jobtracker - MapReduce - [issue]
...Some actions like changing the priority of a job, killing a job, killing a task may need to be tracked for admin purposes. It would be good to, at a minimum, log these at an INFO level in th...
http://issues.apache.org/jira/browse/MAPREDUCE-330    Author: Hemanth Yamijala, 2014-07-21, 22:54
[MAPREDUCE-246] Job recovery should fail or kill a job that fails ACL checks upon restart, if the job was running previously - MapReduce - [issue]
...Consider a scenario where a job was submitted to the M/R system and runs for a while. Then say the JT is restarted, and before that the ACLs for the user are changed so that that user can no...
http://issues.apache.org/jira/browse/MAPREDUCE-246    Author: Hemanth Yamijala, 2014-07-21, 22:49
[MAPREDUCE-317] Submitting job information via DFS in Map/Reduce causing consistency and performance issues - MapReduce - [issue]
...Job submission involves two steps: submitting jobs to the System directory on DFS (done by the client), then submit the job via the JobSubmissionProtocol to JobTracker. This two step process...
http://issues.apache.org/jira/browse/MAPREDUCE-317    Author: Hemanth Yamijala, 2014-07-21, 22:14
[MAPREDUCE-555] Provide an option to turn off priorities in jobs - MapReduce - [issue]
...The fairshare scheduler can define pools mapping to queues (as defined in the capacity scheduler - HADOOP-3445). When used in this manner, one can imagine queues set up to be used by users w...
http://issues.apache.org/jira/browse/MAPREDUCE-555    Author: Hemanth Yamijala, 2014-07-21, 20:46
[MAPREDUCE-314] Avoid priority inversion that could result due to scheduling running jobs in an order sorted by priority - MapReduce - [issue]
...Consider a job, J1, with priority NORMAL that is running reduce tasks occupying all reduce slots and has running and pending map tasks. At this point, suppose a job, J2, is submitted with pr...
http://issues.apache.org/jira/browse/MAPREDUCE-314    Author: Hemanth Yamijala, 2014-07-21, 17:44
[MAPREDUCE-507] Have backlinks from history pages to main jobtracker page - MapReduce - [issue]
...When we go from jobtracker.jsp to the job history page, and from then on to any other page in history, there is no way to go back to the jobtracker page. It would be nice to add this....
http://issues.apache.org/jira/browse/MAPREDUCE-507    Author: Hemanth Yamijala, 2014-07-19, 00:59
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