Joe McDonnell created IMPALA-13253:
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Summary: Add option to use TCP keepalives for client connections
Key: IMPALA-13253
URL: https://issues.apache.org/jira/browse/IMPALA-13253
Project: IMPALA
Issue Type: Task
Components: Backend, Clients
Affects Versions: Impala 4.5.0
Reporter: Joe McDonnell
A client can be disconnected without explicitly closing its TCP connection.
This can happen if the client machine resets or there is a network disruption.
In particular, load balancers can have an idle time that results in a
connection becoming invalid. Impala can't really guarantee that the client will
properly tear down its connection and the Impala side resources will be
released.
TCP keepalive would allow Impala to detect dead clients and close the
connection. It also can prevent a load balancer from seeing the connection as
idle. This can be important for clients that hold connections in a pool.
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