Josh Rosen created SPARK-6629:
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Summary: cancelJobGroup() may not work for jobs whose job groups
are inherited from parent threads
Key: SPARK-6629
URL: https://issues.apache.org/jira/browse/SPARK-6629
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 1.3.0, 1.0.2, 1.1.2, 1.2.2
Reporter: Josh Rosen
Assignee: Josh Rosen
Priority: Minor
When a job is submitted with a job group and that job group is inherited from a
parent thread, there are multiple bugs that may prevent this job from being
cancelable via SparkContext.cancelJobGroup():
- When filtering jobs based on their job group properties, DAGScheduler calls
get() instead of getProperty(), which does not respect inheritance, so it will
skip over jobs whose groups were inherited.
- Properties objects are mutable, but we do not make defensive copies /
snapshots, so modifications of the parent thread's job group will cause running
jobs' groups to change.
Both of these issues are easy to fix: use `getProperty()` and perform defensive
copying.
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