Chris created SPARK-35399:
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Summary: State is still needed in the event of executor failure
Key: SPARK-35399
URL: https://issues.apache.org/jira/browse/SPARK-35399
Project: Spark
Issue Type: Documentation
Components: Documentation
Affects Versions: 3.1.1
Reporter: Chris
[Graceful Decommission of
Executors|https://spark.apache.org/docs/3.1.1/job-scheduling.html#graceful-decommission-of-executors]
section states that:
{quote}a Spark executor exits either on failure or when the associated
application has also exited. In both scenarios, all state associated with the
executor is no longer needed and can be safely discarded.
{quote}
However, in the case of a flaky app with tasks causing occasional executor OOM,
state _is_ needed to prevent triggering of the stage failure mechanism to
regenerate missing blocks. Hence, the Shuffle Service is valuable in this
scenario, not only in the dynamic resource allocation scenario.
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