Michael Ho created IMPALA-8701:
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Summary: Document idle session management after IMPALA-7802
Key: IMPALA-8701
URL: https://issues.apache.org/jira/browse/IMPALA-8701
Project: IMPALA
Issue Type: Documentation
Components: Docs
Reporter: Michael Ho
Assignee: Alex Rodoni
After IMPALA-7802 is fixed, the network connection of an idle session will be
closed {{\-\-idle_client_poll_time_s}} seconds latest after the session has
been declared idle. This is a change of behavior from previous versions in
which the client connection will hang around until the user explicitly closes
the session and disconnects.
By default, {{\-\-idle_client_poll_time_s}} is set to 30 seconds and the
previous behavior can be restored by setting to 0. In addition, the session
will only be closed if idle session timeout has been configured to be greater
than 0 for the session either via the startup flag {{--idle_session_timeout}}
or the query option {{IDLE_SESSION_TIMEOUT}}. If idle session timeout is not
configured, a session cannot become idle by definition and therefore its
connection cannot be closed until the client explicitly closes it.
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