MessageSeqId startId = MessageSeqId.newBuilder().setLocalComponent(1).build();
CountDownLatch l = new CountDownLatch(1);
Message m = Message.newBuilder().setBody(ByteString.copyFromUtf8(String.valueOf(1))).build();
TestCallback cb = new TestCallback(l);
pm.persistMessage(new PersistRequest(topic, m, cb, null));
assertTrue("Persistence never finished", l.await(10, TimeUnit.SECONDS));
final CountDownLatch oplatch = new CountDownLatch(3);
fdm.start();
fdm.startServingSubscription(topic, subscriber, prefs, startId, dep, filter,