packyan opened a new pull request, #39021:
URL: https://github.com/apache/spark/pull/39021
…own hook timeout.
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### What changes were proposed in this pull request?
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In the stop method of SparkContext, a timeout limit is added to
metricsSystem#report. When it is not completed for more than 1s, continue with
the subsequent steps.
### Why are the changes needed?
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When the user does not explicitly call the stop method of SparkContext, the
stop will be executed by ShutdownHook, and the Hadoop shutdown hookmanager used
by Spark needs to complete the hook entry within 10s, so when the metricsSystem
takes a long time to complete the report (for example, the sink occurs time
out), other hooks may be blocked and cannot be executed successfully.
For example, the unregister operation in ApplicationMaster may fail to
execute because the metrics report costs too much time, so the Spark job has
been successfully completed, but Yarn still considers it a failed job.
### Does this PR introduce _any_ user-facing change?
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No
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test manually, due to the difficulty of constructing the timeout execution
of metrics#report. Unit test want help!
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