Yuqingmu opened a new issue #8211: Check the Writable and Readable validity of 
the connection
URL: https://github.com/apache/incubator-druid/issues/8211
 
 
   Hi!
   We have a problem,That is  mysql  master-slave switch,but  there is  have 
DNS cache,So maybe druid still connect a Writable  database ip, but it is 
changed to be a  Readable database ,So if we want to write data into the 
database, it will be failed. What can I do?
   thank you!

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