Keith Sun created SPARK-22902:
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Summary: do not count failures if the speculative task is killed
as the same task finished in other executor
Key: SPARK-22902
URL: https://issues.apache.org/jira/browse/SPARK-22902
Project: Spark
Issue Type: Bug
Components: Block Manager
Affects Versions: 2.1.1
Reporter: Keith Sun
It is a logic issue, so i did not include much env but my log in the ticket.
Spark conf related to this issue :
spark.task.maxFailures=2
spark.speculation=true
My case is this : my task 239 failed first on an executor and then restarted
in another executor while due to it is kind of running slow, spark started
another speculative job as we set speculative execution as true.
After some short time, the second task finished and then spark killed the
specutive task.
But this cause the whole spark job aborted as the task failure is 2 (first
failure due to some other issue + the killed specutive one).
This is confusing as the task 239 is actually finished successfully and the
specutive is killed ,not failed by itself.
Shall we ignore the speculative failure caused by active kill ?
My log :
{noformat}
17/12/25 12:25:02 INFO TaskSetManager: Starting task 239.0 in stage 1.0 (TID
10254, host-620-1507-026.lvs02xxxx, executor 208, partition 239, PROCESS_LOCAL,
5910 bytes)
17/12/25 12:36:18 INFO TaskSetManager:
Lost task 239.0 in stage 1.0 (TID 10254) on host-620-1507-026.lvs02xxxx,
executor 208: org.apache.spark.SparkException (Task failed while writing rows)
[duplicate 1]
17/12/25 12:36:18 INFO TaskSetManager: Starting task 239.1 in stage 1.0 (TID
10601, host-620-1507-038.lvs01xxxx, executor 343, partition 239, PROCESS_LOCAL,
5910 bytes)
17/12/25 12:39:19 INFO TaskSetManager: Marking task 239 in stage 1.0 (on
host-620-1507-038.lvs01xxxx) as speculatable because it ran more than 45608 ms
17/12/25 12:39:19 INFO TaskSetManager: Starting task 239.2 in stage 1.0 (TID
15142, host-620-1507-030.lvs03xxxx, executor 361, partition 239, PROCESS_LOCAL,
5910 bytes)
17/12/25 12:39:22 INFO TaskSetManager: Killing attempt 2 for task 239.2 in
stage 1.0 (TID 15142) on host-620-1507-030.lvs03xxxx as the attempt 1 succeeded
on host-620-1507-038.lvs01xxxx
17/12/25 12:39:22 INFO TaskSetManager: Finished task 239.1 in stage 1.0 (TID
10601) in 183663 ms on host-620-1507-038.lvs01xxxx (executor 343) (4606/5000)
17/12/25 12:39:28 INFO TaskSetManager: Task 239.2 in stage 1.0 (TID 15142)
failed, but another instance of the task has already succeeded, so not
re-queuing the task to be re-executed.
17/12/25 12:39:28 ERROR TaskSetManager: Task 239 in stage 1.0 failed 2 times;
aborting job
17/12/25 12:39:28 INFO YarnClusterScheduler: Cancelling stage 1
17/12/25 12:39:28 INFO YarnClusterScheduler: Stage 1 was cancelled
17/12/25 12:39:28 INFO DAGScheduler: ResultStage 1 (sql at
SparkStatement.scala:61) failed in 865.935 s due to Job aborted due to stage
failure: Task 239 in stage 1.0 failed 2 times, most recent failure: Lost task
239.2 in stage 1.0 (TID 15142, host-620-1507-030.lvs03xxxx, executor 361):
org.apache.spark.SparkException: Task failed while writing rows
{noformat}
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