Did not receive a response from XXX XXXX

Hi -
I get the following error message when trying to do a video, audio, or screen sharing chat with one particular contact. I don't get this issue for any other contact, and neither does he.

I've tried deleting all com.apple.iChat* files from /Users/btruitt/Library/Preferences, and so has he.

We get this both when at our campus network at work, and over the Internet from our homes (and all permutations thereof).

We get this for jabber and for AIM accounts.

The error message we get is below:

Date/Time: 2009-05-21 14:01:15.213 -0500
OS Version: 10.5.7 (Build 9J61)
Report Version: 4

iChat Connection Log:
2009-05-21 14:00:56 -0500: AVChat started with ID 4135883420.
2009-05-21 14:00:56 -0500: 0x152f2090: State change from AVChatNoState to AVChatStateWaiting.
2009-05-21 14:00:56 -0500: btruitt@jabber.rackspace.com2: State change from AVChatNoState to AVChatStateInvited.
2009-05-21 14:01:01 -0500: 0x152f2090: State change from AVChatStateWaiting to AVChatStateConnecting.
2009-05-21 14:01:01 -0500: btruitt@jabber.rackspace.com2: State change from AVChatStateInvited to AVChatStateConnecting.
2009-05-21 14:01:11 -0500: 0x152f2090: State change from AVChatStateConnecting to AVChatStateEnded.
2009-05-21 14:01:11 -0500: 0x152f2090: Error -8 (Did not receive a response from 0x152f2090.)
2009-05-21 14:01:11 -0500: btruitt@jabber.rackspace.com2: State change from AVChatStateConnecting to AVChatStateEnded.
2009-05-21 14:01:11 -0500: btruitt@jabber.rackspace.com2: Error -8 (Did not receive a response from 0x152f2090.)

Video Conference Error Report:


Video Conference Support Report:
0.328207 @Video Conference/VCInitiateConference.m:1584 type=2 (00000000/0)
[Connection Data for call id: 1 returns 1
]
[]
28.922483 @Video Conference/VCInitiateConference.m:1584 type=2 (00000000/0)
[Connection Data for call id: 2 returns 1
]
[]
29.070342 @Video Conference/VCInitiateConference.m:1599 type=2 (00000000/0)
[Prepare Connection With Remote Data - remote VCConnectionData: 1, local VCConnectionData: 1
]
[]
371.641867 @Video Conference/VCInitiateConference.m:1584 type=2 (00000000/0)
[Connection Data for call id: 3 returns 1
]
[]
371.869960 @Video Conference/VCInitiateConference.m:1599 type=2 (00000000/0)
[Prepare Connection With Remote Data - remote VCConnectionData: 1, local VCConnectionData: 1
]
[]


Video Conference User Report:
0.000000 @:0 type=5 (00000000/16402)
[Local SIP port]
[]


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MacBook Pro, Mac OS X (10.5.7), iChat version 4.0.8 (619)

Posted on May 21, 2009 12:52 PM

Reply
5 replies

May 21, 2009 2:47 PM in response to benvolioT

Hi,

That is very unusual to get this between just one Buddy and in different Locations.

Error 8 normally refers to ports or the way the LAN is laid out.
Most likely changing locations would get around that.

The same would be true if the two ends had NAT devices that for iChat "Don't Play Nicely"

I take it both ends have System Preferences > Quicktime > Streaming at 1.5Mbps as it can sometimes be speed ?
(you will need to Restart iChat if you Change the speed)

In System Preferences > Security > Firewall iChat is Not an Essential App.

User uploaded file

10:47 PM Thursday; May 21, 2009

Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

May 21, 2009 3:01 PM in response to Ralph-Johns-UK

Hi -
Thanks for the quick reply and for all of your helpful posts on this forum.

Yes, we both have set quicktime streaming to 1.5 Mbps, and we both have the firewall setting at "Allow all incoming connections."

We also both tried setting our iChat bandwidth limit to 500 Kbps, with no luck.

After each setting change, we both restarted iChat, and at one point we both restarted our computers too.

Tomorrow we'll try using a different VLAN on our campus network that I know has worked for us before to further rule out networking issues.

Other than that, our best theory at this point is that the issue is an iChat bug.

Note also that we were both able to seperately video chat with a colleague with our current settings and network configurations, but when trying to chat with each other, video chat failed.

Thanks,
Ben

May 22, 2009 11:29 AM in response to benvolioT

Hi,

It would be interesting to know where in relation to your current network the colleague is ?

iChat requires that it has a very linear path to the Internet from behind routers and modems.
This means that if there are more then one router that either they are in Bridge mode and a Central devices handles all the Routing (IP Addressing) for the network
OR
That very clearly a device that routes only does as far as the next routing device to make sure there are no over-lapping networks (subnets)

A VLAN would essentially get around this.

Most devices use NAT (Network Address Translation) to change the IP group and Number your computer is in and has to the IP range the router has from the previous device.

Lets presume there is a modem that routes and it issues IPs in the range 10.0.0.x
That same Modem will get an IP from the Internet Service provider (Say 1.1.1.1 as an example)
If we say thee computer gets an IP from the Router in group 192.168.0.x

From the computer the router is normally the base number (192.168.1.1)
From the modem it is likely to to be the second (10.0.0.2)
In between this is NAT> It is done in the software or the router.

The same thing happens at the modem to Internet link in the modem.

What does seem to happen when iChat goes through several NAT devices is that the port gets changed.

Sort of like a car. You are the data packets. The car is a Ford. You go along 192.168.1 Ave. to the corner then go along Street 10.0.0. then on to highway 1.1.1
Now the car should always be a Ford (As that represents the Port)

What is happening in this Log is the equivalent of finding the car has changed to a Jaguar or Volkswagon.

The Log is like an overhead camera shot as the car changes between Ford and Jaguar and possibly Volkswagon and others at the corner as it changes road.

NAT works, in it's simplest view, by adding IP Headers to the data stream packets that get added to the return data form the incoming stuff.
These IP Headers are not supposed to change the port. The default is to leave them alone and if Port Forwarding is used they are specifically set to stay the same.

As to why this happens is difficult to say or to lay blame at any one door.
Apple could have made iChat more Browser like but it would have lost some security and the Peer-to-Peer nature of Video chats.
Router and modem manufacturers could use Standard for doing NAT so the issue did not arise in the first place.

What we do know is if one end does not use NAT, like the Apple Test accounts, then the issue goes away.
Also using UPnP to allow ports to be used through a device also seems less reliant on NAT (Presumably as control is given to the app itself).

Obviously some of these things can be out of your control in a large corporate or campus situation.

This is not so much of a set of Fix instructions but more on the why behind the reasons it does not always work.

User uploaded file

7:29 PM Friday; May 22, 2009

Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

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