yogesh garg created SPARK-25901:
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Summary: Barrier mode spawns a bunch of threads that get collected
on gc
Key: SPARK-25901
URL: https://issues.apache.org/jira/browse/SPARK-25901
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.4.0
Reporter: yogesh garg
Attachments: Screen Shot 2018-10-31 at 11.57.25 AM.png, Screen Shot
2018-10-31 at 11.57.42 AM.png
After a barrier job is terminated (successfully or interrupted), the
accompanying thread created with `Timer` in `BarrierTaskContext` shows in a
waiting state until gc is called. We should probably have just one thread to
schedule all such tasks, since they just log every 60 seconds.
Here's a screen shot of the threads growing with more tasks:
Here's a screen shot of constant number of threads with more tasks:
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