[ZOOKEEPER-4793] The zookeeper server return the wrong response for ruok command.

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.9.1
• Component/s: server
• Assignee: Unassigned
• Reporter: Yan Zhao
• Created: 25/Jan/24 03:45
• Updated: 25/Jan/24 03:45

Description

Users often use the ruok command to probe the zookeeper server status. If the ruok command doesn't return the response, the automation tool will restart the zookeeper.

But if the quorum zookeeper server encounters some unexpected error, it changes the state to State.ERROR. That means the server can't serve the service anymore. But the ruok still returns the `imok`.

In this case, it should return `This ZooKeeper instance is not currently serving requests` like other command(WatchCommand)