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1657e7be14
Consider: - n1, n2 in the cluster - n2 shutdown - n2 sends gossip shutdown message to n1 - n1 delays processing of the handler of shutdown message - n2 restarts - n1 learns new gossip state of n2 - n1 resumes to handle the shutdown message - n1 will mark n2 as shutdown status incorrectly until n2 restarts again To prevent this, we can send the gossip generation number along with the shutdown message. If the generation number does not match the local generation number for the remote node, the shutdown message will be ignored. Since we use the rpc::optional to send the generation number, it works with mixed cluster. Fixes #8597 Closes #9381