GitHub user tianshimoyi added a comment to the discussion: Does the 
Cluster-level failover of pulsar have any requirements on the version of 
pulsar? Is version 2.10 or higher required? 2.9.4 Can it be used?

@Shoothzj  @tisonkun  Hi, My steps are as follows:
1. Open the producer consumption message
2. Turn off all promary broker nodes
Then it was found that there was no master-slave switchover, and the failure 
time had exceeded failoverDelay=10s

![截屏2023-03-21 上午10 09 
48](https://user-images.githubusercontent.com/68532999/226503108-0ad74144-25d2-4a21-a92d-53de80470254.png)


GitHub link: 
https://github.com/apache/pulsar/discussions/19818#discussioncomment-5376325

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