bd276fd087
Currently, if the node is actually down, although the streaming_timeout is 10 seconds, the sending of the verb will return rpc_closed error immediately, so we give up in 20 * 5 = 100 seconds. After this change, we give up in 10 * 30 = 300 seconds at least, and 10 * (30 + 30) = 600 seconds at most.