Retry timer works just fine unless it is below the connection timeout which is hardcoded to 15 seconds. The problem here is when the retry timer is below 15 seconds say 5 seconds. During a switch reload, ODL cannot connect and since it takes 15 seconds to give up on a connection, we end up with three or more threads trying to connect to the same switch and when the switch is back online, sometimes more than one connection “succeeds” and we end up in a state where we do not propagate bindings …