If you go to the MapReduce ApplicationMaster or HistoryServer UI and open the list of tasks, then try to sort by the task name/id, it does nothing.
Note that if you go to the task attempts, that seem to sort fine.
- is duplicated by
MAPREDUCE-6300 Task list sort by task id broken
- relates to
MAPREDUCE-6309 Sort by Elapsed Time doesn't work properly in Task UI