Jason Lowe created TEZ-3052:
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Summary: Task internal error due to Invalid event:
T_ATTEMPT_FAILED at FAILED
Key: TEZ-3052
URL: https://issues.apache.org/jira/browse/TEZ-3052
Project: Apache Tez
Issue Type: Bug
Affects Versions: 0.7.0
Reporter: Jason Lowe
A task encountered an internal error due to "Invalid event: T_ATTEMPT_FAILED at
FAILED". The task had two outstanding attempts, as one was speculative. The
main attempt failed causing the task to fail, and when the speculative attempt
subsequently failed the T_ATTEMPT_FAILED triggered the invalid state transition.
It appears there needs to be some hardening of the TaskImpl state machine in
light of speculative attempt events arriving late. Besides this scenario I
think there may be others, e.g.: speculative attempt succeeding just as overall
task fails appears to be unhandled.
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