[SPARK-26604][CORE][BACKPORT-1.6] Clean up channel registration for S… #26988
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…treamManager ## What changes were proposed in this pull request? This is mostly a clean backport of #23521 to branch-1.6 ## How was this patch tested? I've tested this debugging local NodeManager using ExternalShuffleService. I've run spark applications and abruptly killing them after registering streams on ExternalShuffleBlockHandler. jvisualvm heap dumps show that OneForOneStreamManager$StreamState references are unreachable.
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…treamManager
What changes were proposed in this pull request?
This is mostly a clean backport of #23521 to branch-1.6
How was this patch tested?
I've tested this debugging local NodeManager using ExternalShuffleService.
I've run spark applications and abruptly killing them after registering streams on ExternalShuffleBlockHandler.
jvisualvm heap dumps show that OneForOneStreamManager$StreamState references are unreachable.