protected synchronized boolean ensureCoordinatorReadyAsync() {
        return ensureCoordinatorReady(time.timer(0), true);
    }
Ensure that the coordinator is ready to receive requests. This will return
immediately without blocking. It is intended to be called in an asynchronous
context when wakeups are not expected.

@return true If coordinator discovery and initial connection succeeded, false otherwise
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AbstractCoordinator.java