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Since the listening socket is open all the time, it was possible to get into stable "initial packet S crossed" loops. * when both sides realize in the drbd_socket_okay() call at the end of the loop that the other side closed the main socket you had the chance to get into a stable loop with repeated "packet S crossed" messages. * when both sides do not realize with the drbd_socket_okay() call at the end of the loop that the other side closed the main socket you had the chance to get into a stable loop with alternating "packet S crossed" "packet M crossed" messages. In order to break out these stable loops randomize the behaviour if such a crossing of P_INITIAL_DATA or P_INITIAL_META packets is detected. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>