Jason918 commented on issue #18128: URL: https://github.com/apache/pulsar/issues/18128#issuecomment-1305020907
> When a topic has no producer and consumer, Broker deletes the metadata of topic from memory. As a result, ledgers of these topics can never be deleted. I am not sure exactly how the zombie topics come from, but from this description, the number may be accumulated for a long time with old clusters. Once user upgraded to a version with this feature, they may need to cleanup a large number of these topics at the first time. From what I see, the total time required to do the cleanup work does not matter that much, maybe even single thread is good enough. But we need to minimize the impact on the server stability. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
