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The important configuration are load-balance-socket-timeout, socket-timeout, load-balance-idle-time and keepalive-timeout. The two load-balance-* configure mod_caucho. socket-timeout and keepalive-timeout configure the Resin side.
load-balance-socket-timeout needs to be large enough to handle any server-side processing delays before the first data.
socket-timeout and keepalive-timeout need to be larger than load-balance-idle-time because they need to keep the connection open for a keepalive request.