private static void onCatchUpTimedOut(final ThreadId id) {
        final Replicator r = (Replicator) id.lock();
        if (r == null) {
            return;
        }
        try {
            r.notifyOnCaughtUp(RaftError.ETIMEDOUT.getNumber(), false);
        } finally {
            id.unlock();
        }
    }
Unblock and continue sending right now.
jraft-core/src/main/java/com/alipay/sofa/jraft/core/Replicator.java