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[Improvement-16872][Master] Select a coordinator from masters to wake up task group
Purpose of the pull request
close #16872
Brief change log
- Add MasterCoordinator to control TaskGroupCoordinator
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This pull request is code cleanup without any test coverage.
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This pull request is already covered by existing tests, such as (please describe tests).
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This change added tests and can be verified as follows:
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Pull Request Notice
If your pull request contain incompatible change, you should also add it to docs/docs/en/guide/upgrede/incompatible.md