Rajesh Balamohan created HIVE-15779:
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             Summary: LLAP: WaitQueue comparators should return 0 when tasks 
are of same priority
                 Key: HIVE-15779
                 URL: https://issues.apache.org/jira/browse/HIVE-15779
             Project: Hive
          Issue Type: Bug
          Components: llap
            Reporter: Rajesh Balamohan


Observed cases, where in tasks within same vertex were competing with each and 
getting killed

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[IPC Server handler 3 on 44598 (1484282558103_4855_1_00_003877_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003179_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003877_7 because of 
lower priority
[IPC Server handler 1 on 44598 (1484282558103_4855_1_00_002959_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003832_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_002959_7 because of 
lower priority
[IPC Server handler 0 on 44598 (1484282558103_4855_1_00_003723_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003254_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003723_7 because of 
lower priority
[IPC Server handler 4 on 44598 (1484282558103_4855_1_00_003560_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003076_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003560_7 because of 
lower priority
[IPC Server handler 2 on 44598 (1484282558103_4855_1_00_003775_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_004011_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003775_7 because of 
lower priority
[IPC Server handler 3 on 44598 (1484282558103_4855_1_00_003842_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_004045_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003842_7 because of 
lower priority
[IPC Server handler 1 on 44598 (1484282558103_4855_1_00_003953_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003915_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003953_7 because of 
lower priority
[IPC Server handler 0 on 44598 (1484282558103_4855_1_00_003819_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003919_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003819_7 because of 
lower priority
[IPC Server handler 4 on 44598 (1484282558103_4855_1_00_002074_8)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003790_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_002074_8 because of 
lower priority
[IPC Server handler 2 on 44598 (1484282558103_4855_1_00_003670_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003736_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003670_7 because of 
lower priority
[IPC Server handler 1 on 44598 (1484282558103_4855_1_00_003153_8)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003877_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003153_8 because of 
lower priority
[IPC Server handler 0 on 44598 (1484282558103_4855_1_00_003328_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003775_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003328_7 because of 
lower priority
[IPC Server handler 4 on 44598 (1484282558103_4855_1_00_003817_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003842_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003817_7 because of 
lower priority
[IPC Server handler 2 on 44598 (1484282558103_4855_1_00_004065_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003723_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_004065_7 because of 
lower priority
[IPC Server handler 3 on 44598 (1484282558103_4855_1_00_003902_7)] 
impl.TaskExecutorService: attempt_1484282558103_4855_1_00_003560_7 evicted from 
wait queue in favor of attempt_1484282558103_4855_1_00_003902_7 because of 
lower priority
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