KAFKA-19294: Fix BrokerLifecycleManager RPC timeouts #19745
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Previously, we could wait for up to half of the broker session timeout for an RPC to complete, and then delay by up to half of the broker session timeout. When taken together, these two delays could lead to brokers erroneously missing heartbeats. This change removes exponential backoff for heartbeats sent from the broker to the controller. The load caused by heartbeats is not heavy, and controllers can easily time out heartbeats when the queue length is too long. Additionally, we now set the maximum RPC time to the length of the broker period. This minimizes the impact of heavy load.
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Previously, we could wait for up to half of the broker session timeout
for an RPC to complete, and then delay by up to half of the broker
session timeout. When taken together, these two delays could lead to
brokers erroneously missing heartbeats.
This change removes exponential backoff for heartbeats sent from the
broker to the controller. The load caused by heartbeats is not heavy,
and controllers can easily time out heartbeats when the queue length is
too long. Additionally, we now set the maximum RPC time to the length of
the broker period. This minimizes the impact of heavy load.