Ngone51 opened a new pull request #34536:
URL: https://github.com/apache/spark/pull/34536
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### What changes were proposed in this pull request?
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Also post the event `SparkListenerExecutorRemoved` when removing an
executor, which is known by `BlockManagerMaster` but unknown to
`SchedulerBackend`.
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In https://github.com/apache/spark/pull/32114, it reports an issue that
`BlockManagerMaster` could register a `BlockManager` from a dead executor due
to reregistration mechanism. The side effect is, the executor will be shown on
the UI as an active one, though it's already dead indeed.
In https://github.com/apache/spark/pull/32114, we tried to avoid such
reregistration for a to-be-dead executor. However, I just realized that we can
actually leave such reregistration alone since
`HeartbeatReceiver.expireDeadHosts` should clean up those `BlockManager`s in
the end. The problem is, the corresponding executors in UI can't be cleaned
along with the `BlockManager`s cleaning. Because executors in UI can only be
cleaned by `SparkListenerExecutorRemoved`,
while `BlockManager`s cleaning only post
`SparkListenerBlockManagerRemoved` (which is ignored by `AppStatusListener`).
### Does this PR introduce _any_ user-facing change?
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Yes, users would see the false active executor be removed in the end.
### How was this patch tested?
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(Let me think more about writing a unit test tomorrow. By now, I don't have
a good idea.)
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