This is how to resolve this problem: To resolve this issue, set this property to 0 and restart Impala: CM > Impala > Configuration > Impala Daemon command-line safety valve: -idle_client_poll_period_s=0 This is a startup flag, not a query option. Its default value is 30 seconds and that is why the session in the above excerpt was closed after 30 secs. By setting it to 0, Impala will not periodically check the client connection. The client connections will remain open until they are explicitly closed on the client applications' side. ... View more