Ming Ma created MAPREDUCE-5835:
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Summary: Killing Task might cause the job to go to ERROR state
Key: MAPREDUCE-5835
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5835
Project: Hadoop Map/Reduce
Issue Type: Bug
Reporter: Ming Ma
Assignee: Ming Ma
There could be a race condition if job is killed right after task attempt
receives TA_DONE event. In that case, TaskImpl might receive
T_ATTEMPT_SUCCEEDED followed by T_ATTEMPTED_KILLED for the same attempt, thus
transition job to ERROR state.
a. The task is in KILL_WAIT.
b. TA receives TA_DONE event.
c. Before TA transitions to SUCCEEDED state, Task sends TA_KILL event.
d. TA transitions to SUCCEEDED state and thus send T_ATTEMPT_SUCCEEDED to the
task. The task transitions to KILLED state.
e. TA processes TA_KILL event and sends T_ATTEMPT_KILLED to the task.
f. When task is in KILLED state, it can't handle T_ATTEMPT_KILLED event, thus
transition job to ERROR state.
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