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https://issues.apache.org/jira/browse/IOTDB-4726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17623626#comment-17623626
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Jialin Qiao commented on IOTDB-4726:
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For this issue, no need to reject connection of CLi. But we'd better return
specified message instead of null or error in calling xxx.
> show cluster return with msg: 500 null
> --------------------------------------
>
> Key: IOTDB-4726
> URL: https://issues.apache.org/jira/browse/IOTDB-4726
> Project: Apache IoTDB
> Issue Type: Bug
> Components: Core/Cluster
> Affects Versions: 0.14.0-SNAPSHOT
> Reporter: changxue
> Assignee: Gaofei Cao
> Priority: Minor
> Attachments: image-2022-10-24-11-13-30-723.png, showCluster-logs.txt
>
>
> show cluster return with msg: 500 null
>
> reproduction:
> # start 3C3D cluster successfully
> # execute stop-confignode.sh and stop-datanode.sh on the other 2 nodes(not
> the leader)
> # start-cli.sh -h <leader IP>
> # show cluster
>
> !image-2022-10-24-11-13-30-723.png!
>
> logs see attachment
>
> 说明：
> 一般来讲，3节点集群，挂掉2个节点就是不可用的。
> 所以这个情况并非不可接受，但是希望将错误提前，比如：在连接时就拒绝连接。
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