I have no idea about your actual code. If you are using a Jdbc connector, it is better to use the 'Hikari Datasource'.  ref) https://devrish.wordpress.com/2019/11/24/impala-database-connection-using-hikari-pool-in-springboot/   And you can use 'close()' method on code that is methods of a Hikari datasource object. It shutdown all of network connection between your server and impala daemon.  ... View more