Marcelo Vanzin created SPARK-24611:
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Summary: Clean up OutputCommitCoordinator
Key: SPARK-24611
URL: https://issues.apache.org/jira/browse/SPARK-24611
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 2.4.0
Reporter: Marcelo Vanzin
This is a follow up to SPARK-24589, to address some issues brought up during
review of the change:
- the DAGScheduler registers all stages with the coordinator, when at first
view only result stages need to. That would save memory in the driver.
- the coordinator can track task IDs instead of the internal "TaskIdentifier"
type it uses; that would also save some memory, and also be more accurate.
- {{TaskCommitDenied}} currently has a "job ID" when it's really a stage ID,
and it contains the task attempt number, when it should probably have the task
ID instead (like above).
The latter is an API breakage (in a class tagged as developer API, but still),
and also affects data written to event logs.
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