aglinxinyuan commented on code in PR #4441:
URL: https://github.com/apache/texera/pull/4441#discussion_r3141315699
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amber/src/main/scala/org/apache/texera/amber/engine/architecture/scheduling/RegionExecutionCoordinator.scala:
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@@ -167,6 +167,8 @@ class RegionExecutionCoordinator(
val actorRef = actorRefService.getActorRef(workerId)
// Remove the actorRef so that no other actors can find the
worker and send messages.
actorRefService.removeActorRef(workerId)
+ asyncRPCClient.inputGateway.removeControlChannel(workerId)
Review Comment:
Restarted regions reuse actorId. Remove stale control channels so the
controller does not reuse old control-message sequence numbers for new workers.
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