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https://issues.apache.org/jira/browse/SPARK-8344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-8344:
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Assignee: (was: Apache Spark)
> Add internal metrics / logging for DAGScheduler to detect long pauses /
> blocking
> --------------------------------------------------------------------------------
>
> Key: SPARK-8344
> URL: https://issues.apache.org/jira/browse/SPARK-8344
> Project: Spark
> Issue Type: New Feature
> Components: Scheduler, Spark Core
> Reporter: Josh Rosen
>
> It would be useful to be able to log warnings if the DAGScheduler event
> processing loop blocks for more than a certain amount of time (or if its
> message inbox grows too large). This debugging logging (probably disabled by
> default) would be very helpful for finding places where the scheduling loop
> blocks / slows down.
> We might be able to infer this information now from the web UI scheduler
> delays, but that's kind of hard to parse out of logs or use to raise
> monitoring alerts.
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