Hi I'm using long polling in my app and I recently noted something funny - it seems there quite a low threshold for how long the server may take to respond. It generally tends to work just fine with a 10 minute timeout, but recently more and more the server side timeout runs out so the server responds, but nothing ever gets to the client until the client side connection times out. The sessions will last longer if while a long poll is running, another connection is established to the server (those connections are short lived).
Looking at wireshark, I see that my client immediately after making the httpwebrequest sends an empty packet with FIN, ACK flags to the server (two packets pretty much concurrently), then another one a bit over a minute later. At that time, if the server responds, data still gets to the client, but a certain time later, nothing goes anymore (I don't even see a single tcp packet going from server to my client). I'm unable to give a precise interval for when this happens - I thought it may be around the 4 minute mark, but I've just had a case where 4.5 minutes after starting the request the server responded and the connection still worked. I have my clients configured so they adapt the interval according to what's configured in server, so I suppose if I set 1 Minute I'd be golden, but it's not very effective both from a traffic standpoint and a power standpoint. So I'm wondering what others that use long polls have experienced in that regard - do you have a reliable cutoff time to which you can adapt your long poll interval? Note that currently I'm using WiFi. I'm also using the exact same code compiled on a PC with much higher intervals just fine - so it must be Android specific. Regards Stephan -- View this message in context: http://mono-for-android.1047100.n5.nabble.com/long-polling-connection-timeouts-tp5713110.html Sent from the Mono for Android mailing list archive at Nabble.com. _______________________________________________ Monodroid mailing list Monodroid@lists.ximian.com UNSUBSCRIBE INFORMATION: http://lists.ximian.com/mailman/listinfo/monodroid
