IDLE_SESSION_TIMEOUT Query Option (CDH 5.15 / Impala 2.12 or higher only)
The IDLE_SESSION_TIMEOUT query option sets the time in seconds after which an idle session is cancelled. A session is idle when no activity is occurring for any of the queries in that session, and the session has not started any new queries. Once a session is expired, you cannot issue any new query requests to it. The session remains open, but the only operation you can perform is to close it.
The IDLE_SESSION_TIMEOUT query option overrides the --idle_session_timeout startup option. See Setting Timeout Periods for Daemons, Queries, and Sessions for the --idle_session_timeout startup option.
The IDLE_SESSION_TIMEOUT query option allows JDBC/ODBC connections to set the session timeout as a query option with the SET statement.
- If --idle_session_timeout is not set, the session never expires.
- If --idle_session_timeout is set, use that timeout value.
Added in: CDH 5.15 / Impala 2.12