Joe McDonnell created IMPALA-14031:
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Summary: Enable keepalive for client connections by default
Key: IMPALA-14031
URL: https://issues.apache.org/jira/browse/IMPALA-14031
Project: IMPALA
Issue Type: Task
Components: Backend
Affects Versions: Impala 5.0.0
Reporter: Joe McDonnell
IMPALA-13253 added support for enabling keepalive for client connections by
setting some startup flags, but it kept keepalive off by default. We should
switch to enabling keepalive for client connections by default. This is
particularly important for setups that use load balancers with idle timeouts,
as that can cause client connections to pile up and hit the fe_service_threads
limit.
We'll need to decide on the default settings. The OS default is to start
keepalive after 2 hours. I think the Impala defaults should be much more
aggressive (e.g. client_keepalive_probe_period_s could be 10 minutes).
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