[CELEBORN-1720] Prevent stage re-run if task another attempt is running #3037
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task_id
Align the LOG
spark3 only
Spark 2 (#30)
ut (#31)
revert ut
Refine the check
ut (#33)
log
Ut for spark utils (#36)
comments
record the reported shuffle fetch failure tasks (#42)
nit
Address comments from mridul (#44)
revert logger => LOG
taskScheduler instance lock and stage uniq id
docs
listener
spark 2
comments
test
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