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[MAPREDUCE-1396] Display more details about memory usage on jobtracker web UI
...HDFS-850 is introducing changes to the NameNode web UI to display additional details of memory information. I think it will be good to have similar information for the jobtracker as well, pa...
, 2015-05-09, 02:20
[MAPREDUCE-1633] Queue ACLs documentation must talk about wildcards
...Currently the Forrest documentation about queue ACLs is not talking about wildcards - the value that states that all users are allowed for an operation in a queue. This should be documented....
, 2014-07-30, 18:15
[MAPREDUCE-897] Provide information captured as part of JobTrackerStatistics via the Hadoop metrics API
...MAPREDUCE-467 introduced a framework to collect statistics per node on a fixed set of intervals. Presently there is support for collecting statistics related to number of task failures and a...
, 2014-07-23, 22:44
[MAPREDUCE-803] Provide a command line option to clean up jobtracker system directory
...When the JT is restarted, the mapreduce system directory's contents are used for job recovery. For sites that use this feature, there might be instances when we don't want to restart to read...
, 2014-07-23, 21:29
[MAPREDUCE-802] Simplify the job updated event notification between Jobtracker and schedulers
...HADOOP-4053 and HADOOP-4149 added events to take care of updates to the state / property of a job like the run state / priority of a job notified to the scheduler. We've seen some issues wit...
, 2014-07-23, 21:27
[MAPREDUCE-763] Capacity scheduler should clean up reservations if it runs tasks on nodes other than where it has made reservations
...Currently capacity scheduler makes a reservation on nodes for high memory jobs that cannot currently run at the time. It could happen that in the meantime other tasktrackers become free to r...
, 2014-07-23, 20:50
[MAPREDUCE-762] Task's process trees may not be killed if a TT is restarted
...Some work has been done to make sure the tasktrackers kill process trees of tasks when they finish (either successfully, or with failures or when they are killed). Related JIRAs are HADOOP-2...
, 2014-07-23, 20:45
[MAPREDUCE-3] Set mapred.child.ulimit automatically to the value of the RAM limits for a job, if they are set
...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...
, 2014-07-22, 22:12
[MAPREDUCE-537] Instrument events in the capacity scheduler for collecting metrics information
...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....
, 2014-07-22, 21:20
[MAPREDUCE-168] mapred job -list all should display the code for Killed also.
...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)....
, 2014-07-22, 20:22
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