modules/jooby-netty/src/main/java/org/jooby/internal/netty/NettyWebSocket.java
private void ready() {
    try {
      ready.await();
    } catch (InterruptedException ex) {
      log.error("Connect call was inturrupted", ex);
      Thread.currentThread().interrupt();
    }
  }
private void ready() {
    try {
      ready.await();
    } catch (InterruptedException ex) {
      log.error("Connect call was inturrupted", ex);
      Thread.currentThread().interrupt();
    }
  }
Make sure hankshake/connect is set.