All nodes in the TiDB cluster are normal, but there is no response when connecting using a program or Navicat. Every time the cluster is restarted, it stops working again after a few minutes. Does anyone know what the issue might be?

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Original topic: tidb集群各个节点都正常，但是使用程序或者Navicat连接没有任何响应，每次重启集群后过了十几分钟就又不能用了，请问有哪位大神知道什么情况吗

| username: TiDBer_5iHOPxrv

[Test Environment for TiDB] Testing
[TiDB Version] 6.5.0
[Reproduction Path] The program cannot connect to the database after running for more than ten minutes each time. Monitoring and cluster status show no anomalies.
[Encountered Issues: Symptoms and Impact]
[Resource Configuration]
[Attachments: Screenshots/Logs/Monitoring]

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| username: xfworld | Original post link

Provide the configuration, logs, and any other useful information you can supplement.

3
| username: Kongdom | Original post link

Display the cluster status.

4
| username: db_user | Original post link

Post a monitoring graph to check the resource status and see if there are any errors in the tidb.log.

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| username: 裤衩儿飞上天 | Original post link
  1. Unable to connect to the database, what error is reported?
  2. Do you have any information on cluster topology and monitoring?
  3. Are there any network issues?
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| username: tidb菜鸟一只 | Original post link

Could it be that the host memory is exhausted… Unable to load the link…

7
| username: Running | Original post link

Check the disk space, memory, firewall, and security mechanisms.

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| username: xingzhenxiang | Original post link

Navicat has become stricter with its licensing requirements. You can try other GUI tools to see if the same issue occurs.