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3410 Views 5 Replies Latest reply: Mar 28, 2012 4:01 AM by Miguel C. RSS
Bronze
Dale
4 posts since
Dec 12, 2007
Currently Being Moderated

Jan 11, 2008 6:44 AM

lost messages when network is disconnected

 

Hello all,

 

 

If our users lose their network connection for some reason they don't receive any messages until they come back online.

 

 

For example :

 

 

user A and user B are both online chatting back and forth

 

 

user B disables their network connection (Openfire Admin Console still shows session presence as online because the client never disconnected gracefully)

 

 

user A sends user B  a message

 

 

user B comes back online, but never receives the message

 

 

 

 

 

We are running Openfire 3.4.1 .

 

 

Any thoughts ?

 

 

Thanks,

 

 

Dale

 

 

 

 

 

  • sixthring KeyContributor
    sixthring
    3,799 posts since
    Apr 2, 2007
    Currently Being Moderated
    Jan 11, 2008 7:02 AM (in response to Dale)
    Re: lost messages when network is disconnected

    Do you have offline messages enabled on the server?  Also that may not make a difference if the user does not disconnect properly.

    • Bronze
      Dale
      4 posts since
      Dec 12, 2007
      Currently Being Moderated
      Jan 11, 2008 9:12 AM (in response to sixthring)
      Re: lost messages when network is disconnected

       

      Yes, offline messages is enabled and works fine, as long as, like you say, they disconnect properly.

       

       

      • Gaston Dombiak Jiver
        Gaston Dombiak
        3,863 posts since
        Sep 26, 2001
        Currently Being Moderated
        Jan 11, 2008 10:57 AM (in response to Dale)
        Re: lost messages when network is disconnected

        Hey Dale,

         

        Based on your description it seems like Openfire is not aware that the socket connection was lost and assumes that the client is still connected. I saw that problem happen when using a nat/router between the client and the server and for that we implemented a client timeout that will detect lost connections that for some reason the TCP layer didn't alert the JVM (i.e. Openfire) about the connection lost. By default the idle timeout is 6 minutes. However this solution leaves a time window where packets could be "lost" as you saw in your case. The final solution would be to use ACK to confirm the reception of each packet but that would be too expensive for a not common problem. Moreover, I think that a XEP for ACK is in progress but Openfire does not implement it.

         

        Regards,

         

          -- Gato

  • Torgrim Brochmann Bronze
    Torgrim Brochmann
    1 posts since
    Aug 26, 2011
    Currently Being Moderated
    Aug 26, 2011 5:16 AM (in response to Dale)
    Re: lost messages when network is disconnected

    We do have the same issue, people can write messages for a long time after a client has been disconnected, and believe that the messages are delivered. XEP for ACK is a must to use Openfire for anything else than my home network (where it of course is running)

  • Miguel C. Bronze
    Miguel C.
    3 posts since
    Mar 28, 2012
    Currently Being Moderated
    Mar 28, 2012 4:01 AM (in response to Dale)
    Re: lost messages when network is disconnected

    Hi

     

    We have some problem.

     

    I'm looking for XEp-0198 support but don't found.

     

    The problem.

     

    User A connect to server, user B connect to server.

     

    User B set airplane mode. The server things user B is connected.

     

    User A send message to user B. The message was received by the server and send to user B.

     

    User B is offline and the server discard the message.

     

    The message never return.

     

    I see the XEp-0198 but Openfire don't support this.

     

    How con i set the server to request message delivery and if the client don't respond store in offline message store?

     

    Thanks

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