[Bug] Namespace admin cli clear-backlog can not clear unloaded topics' backlog

[zhanghaou]

Search before asking

• I searched in the issues and found nothing similar.

Version

3.0.0 and current master version.

Minimal reproduce step

1. setup a standalone cluster, and disable inactive topic auto delete.
2. create a namespace public/test, and create a topic public/test/test, and then create a sub for public/test/test
3. use pulsar-pref to produce some message to public/test/test
4. close all producers and consumers to public/test/test
5. unload public/test: pulsar-admin namespaces unload public/test
6. use namespace admin: pulsar-admin namespaces clear-backlog public/test

What did you expect to see?

All topics' backlogs in namespace public/test can be deleted.

What did you see instead?

And then, use lookup admin cli to public/test/test.
Wait for 5 mins, use pulsar-admin topics stats pubic/test/test.
backlog is not 0.

Anything else?

When namespace bundle is unloaded, topics in this bundle can not clear backlog.

I'm not sure if it's by design or a system bug.

Are you willing to submit a PR?

• I'm willing to submit a PR!

[github-actions]

The issue had no activity for 30 days, mark with Stale label.

[poorbarcode]

I'm not sure if it's by design or a system bug.

Yes, It is a known issue.

[zhanghaou]

@poorbarcode Can you help provide a link to the issue?

[poorbarcode]

@zhanghaou

Can you help provide a link to the issue?

There used to be a discussion in the discussion list, but I can't find it 😂

[github-actions]

The issue had no activity for 30 days, mark with Stale label.