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When a new node bootstraps to join the cluster, it will be set in bootstrap gossip status. If the node is gone in the middle, the node will be removed by gossip after the new node fails to update gossip after fat_client_timeout, which reverts the new node as pending node. However, if the new node is slow to update gossip and it finishes bootstrapping after existing nodes have removed the new node after fat_client_timeout. In handle_state_normal handler, the existing nodes will fail to find the host id for the new node and throw and in turn terminate the scylla process. To mitigate the problem, we set fat_client_timeout which is half of quarantine_delay to a minimum value if users set a small ring_delay value. Refs #8702 Refs #8859 Closes #8860