Penghui Li

> Delete message index bucket After merging buckets, the delayed message tracker will delete the old bucket. Also, when all the delayed messages of all snapshots in the bucket are...

@zymap Looks like the failed test https://github.com/apache/pulsar/issues/16376 only for this PR, could you please help check?

The Python Client for macos haven't push yet, I will push it later.

@nodece Do you want to fix this flaky test?

A new one https://github.com/apache/pulsar/runs/7471854513?check_suite_focus=true

A new one https://github.com/apache/pulsar/runs/7709485227?check_suite_focus=true

A new one: https://github.com/apache/pulsar/runs/7781756219?check_suite_focus=true

Please have a discussion under the dev mailing list first, the PR changed the default value. Here is an example of enabling system topic https://lists.apache.org/thread/styoxk31q82bdp3qcv2hwxg7wvsmk8dy I support this change, but...

Another failure: https://github.com/apache/pulsar/runs/7614369839?check_suite_focus=true

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