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Configures default KeepAliveConfig on regionserver connections, including setting TCP_USER_TIMEOUT on linux systems. TCP_USER_TIMEOUT is an additional layer of protection. It handles the case of a dead connection, but the send buffer is full such that keep alives packets are not able to be sent. By setting it to the time of the full timeout of the normal keepalives it won't short-circuit the normal keepalives. See https://blog.cloudflare.com/when-tcp-sockets-refuse-to-die/
This is now handled by TCP keep alives.
It has been replaced by TCP keepalives.
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Remove ReadDeadlines in the regionserver client and replace them with TCP keepalives to detect half-closed connections.
HBase is not guaranteed to return a heartbeat in a given amount of time. This can result in spurious errors caused by the the regionserver client's ReadDeadlines.