When Qos is AT_MOST_ONCE , connection.publish() is blocked all the time.

[zzhangxiaoyun]

When Qos is AT_MOST_ONCE , connection.publish() is blocked all the time.
I found class CallbackConnection line 699.

private void send(Acked command, Callback cb) {
    short id = 0;
    //if(command.qos() != QoS.AT_MOST_ONCE) {
        id = getNextMessageId();
        command.messageId(id);
   // }
    send(new Request(id, command.encode(), cb));
}

remove the "//", problem solved。

Looking forward to your reply，thank you。