log.debug("MSG HISTORY before: " + msgHistory);
// make sure our handler will save the 'future' of the next write operation - 'stream'
mock.enableSaveTheFuture(true);
// delay write complete. insert Timeout exception before that
mock.delayWriteComplete(true);
log.debug("send back the /register response");
RegisterResponseEntry entry = new RegisterResponseEntry(1L, (short)1, SOURCE1_SCHEMA_STR);
String responseStr = NettyTestUtils.generateRegisterResponse(entry);
body = new DefaultHttpChunk(