FarhadF opened a new issue, #15638:
URL: https://github.com/apache/druid/issues/15638

   After Mysql (aws aurora) failover, druid is still connected to the same 
instace (now readonly instance)
   
   ### Affected Version
   27.0.0
   
   ### Description
   
   - Cluster size: 15 node
   - Configurations in use: using mysql metastore with aws aurora, the URL is 
the writer url of the aurora database cluster which will be switched to the 
current writer instance (the ip address will be updated when failover happens).
   - Steps to reproduce the problem: druid cluster with mysql metadatastore 
deployed. aurora mysql with at least 2 instances. Use the writer endpoint in 
druid configurations. Then fail over the cluster to the second node.
   - The error message or stack traces encountered. Providing more context, 
such as nearby log messages or even entire logs, can be helpful.
   
![image](https://github.com/apache/druid/assets/17374492/2f14a272-d1a3-4cce-a8be-ea6e587b89d4)
   
   I believe there should be a catch for this exception that renews the mysql 
connection pool. This will allow druid to always connect to the writer instance 
on highly available environments.


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