AnsweredAssumed Answered

Receiving lost, unordered and duplicate messages at stream resumption

Question asked by Aejaz on May 19, 2015
Latest reply on May 10, 2017 by raditya gumay



I am using Smack 4.1.1 on Android with Tigase version 7.0.1 have the attached logic

for setting up the connection & login. When I disable the connection on Android device,

ReconnectionManager comes into play & successfully obtains the connection when I

re-enable the connection. During the period, the current device(i.e. the receiver) is offline,

if the sender sends messages(actual text) 1,2,3,4,5,6 on enabling the connection for receiver

messages 1,6,4,4,2,6 are received in the order written. I have tried this many times but the

order remains jumbled with duplicates. Although the number of messages received is always

same as the number of messages sent by the sender.


From server logs, it is clear that the server is correctly resuming the stream & is sending the

messages back in the right order with no message loss or duplication which implies that there

is something wrong with my logic.  Can someone please take a look & guide.


static {





SmackConfiguration.DEBUG = true;

XMPPTCPConnectionConfiguration config = XMPPTCPConnectionConfiguration









XMPPTCPConnection connection = new XMPPTCPConnection(config);



StanzaFilter filter = MessageTypeFilter.CHAT;

connection.addAsyncStanzaListener(new StanzaListener() {


            public void processPacket(Stanza packet) {



         }, filter);


connection.login(username, password, resource);

Presence presence = new Presence(Presence.Type.available);