I have tried specifying our local dns servers and Google's public dns server.
Using the local servers I get this error: ### WARNING: could not add DNS server '192.168.<snip>' to the network stack ### WARNING: will use system default DNS server Using Google's public dns server I get this message: DNS server name '8.8.8.8' resolved to 8.8.8.8:55 The Exception still occurs for either configuration. -Dan On Jan 13, 12:17 pm, Kostya Vasilyev <[email protected]> wrote: > Perhaps the emulator has trouble mirroring your computer's DNS setup. > > http://developer.android.com/guide/developing/tools/emulator.html#dns > > You could try starting the emulator with -dns-server <serverList> option > to manually specify the addresses of your computer's DNS servers, to see > if it makes the behavior consistent with the host computer. > > -- Kostya > > 13.01.2011 23:09, Dan пишет: > > > > > > > > > After testing on an emulator and at the same time the host computer is > > able to resolve the domain name this issue cannot be isolated to wifi > > problems. > > > -Dan > > > On Jan 12, 11:00 pm, Bob Kerns<[email protected]> wrote: > >> UnknownHostException means your device was unable to get a positive > >> response to the DNS query trying to look up the hostname. > > >> It doesn't distinguish between "We couldn't talk to the DNS server", > >> "we have no network connection right now", "we have never even HEARD > >> of net work, what's that?", or "we carefully and thoroughly discussed > >> it with the DNS server, which in turn discussed it with the relevant > >> authoritative DNS servers, and can conclusively state, that the host > >> named does not exist at this time". > > >> What you CAN say, is it never got to the point of actually trying to > >> talk to that host, because it didn't get enough information to do so. > >> That is, it is not saying "we've heard of that host, but it doesn't > >> seem to be there". > > >> The most likely cause is a temporary failure in your wifi connection, > >> just as it was trying the DNS lookup. But the DNS server itself could > >> be to blame, or if it's a DNS server on your site, the connection > >> upstream, or an upstream DNS server could be to blame. > > >> I use my local wifi server as a DNS server. It's been giving me > >> problems like this lately, even on wired connections. Plus, it is not > >> compatible with IPv6, so I'm going to need to upgrade it soon. I could > >> configure it to advertise OpenDNS servers instead (which is what it > >> itself is using), but have slightly longer lookups and no cached data > >> if the cable connection hiccups. If it's the cable connection that's > >> at fault, then I'll have these problems anyway. It won't be easy to > >> track down. > > >> On Jan 12, 8:44 pm, Ankur Avlani<[email protected]> wrote: > > >>> Unfortunately, the server is not local. > >>> On Wed, Jan 12, 2011 at 4:15 PM, Dan<[email protected]> wrote: > >>>> Hello All, > >>>> I have had this error both on emulator and a Motorola Droid while > >>>> using a WIFI connection. I have surrounded the http request with WIFI > >>>> state checks and before and after WIFI is reported state 3 > >>>> (WIFI_STATE_ENABLED) and a connection speed of 54 . I have also > >>>> confirmed, using an adb shell with the emulator, that the emulator > >>>> cannot ping the website in question giving a domain resolution error. > >>>> To compare notes with Ankur, is the server on your LAN and the IP used > >>>> internal? mine is. > >>>> I have also tried AndroidHttpClient which does work on the same url. > >>>> -Dan > >>>> On Jan 12, 12:23 pm, Ankur Avlani<[email protected]> wrote: > >>>>> True, I agree with what you say. Its just that I feel, other apps > >>>>> should > >>>>> also break or give error. > >>>>> Anywayz, Thanks a lot for your inputs. > >>>>> regards, > >>>>> Ankur. > >>>>> On Wed, Jan 12, 2011 at 12:17 PM, Brill Pappin<[email protected]> wrote: > >>>>>> Well i suppose thats possible if your messing with the network stack, > >>>>>> but it's pretty low level for Java/Android. > >>>>>> I guess its also possible that the Android version you have has a > >>>>>> crappy stack or driver... or you have rooted it and have been messing > >>>>>> around under the covers so to speak. > >>>>>> There is nothing in Android really that would allow you to mess it up > >>>>>> that badly AFAIK, so I doubt it's your application causing the problem > >>>>>> if your not specifically getting under the covers. > >>>>>> However, the meaning of the exception is clear: > >>>>>>http://download.oracle.com/javase/1.4.2/docs/api/java/net/UnknownHost. > >>>> .. > >>>>>> and your app doesn't really control the process of translating a > >>>>>> domain to an ip. > >>>>>> - Brill Pappin > >>>>>> On Jan 12, 2:54 pm, Ankur Avlani<[email protected]> wrote: > >>>>>>> Somehow I have this feeling it is related to my app only. Other apps > >>>> on > >>>>>> the > >>>>>>> phone, I don't see any such issue. Even when browsing on my phone, I > >>>>>> don't > >>>>>>> see any error. > >>>>>>> On Wed, Jan 12, 2011 at 11:41 AM, Kumar Bibek<[email protected]> > >>>>>> wrote: > >>>>>>>> By Wi-Fi, I meant, you phone's Wi-Fi could be turning on and off. > >>>> There > >>>>>> is > >>>>>>>> no other reason I can think of. It happens for me as well, > >>>> sometimes. > >>>>>>>> Kumar Bibek > >>>>>>>>http://techdroid.kbeanie.com > >>>>>>>>http://www.kbeanie.com > >>>>>>>> On Thu, Jan 13, 2011 at 1:10 AM, Ankur Avlani< > >>>> [email protected] > >>>>>>> wrote: > >>>>>>>>> I am sorry, that somehow doesn't convince me. I am connected to > >>>> the > >>>>>> same > >>>>>>>>> wifi on my laptop and i never see any web page load error on my > >>>>>> laptop. > >>>>>>>>> On Wed, Jan 12, 2011 at 11:38 AM, Kumar Bibek< > >>>> [email protected] > >>>>>>> wrote: > >>>>>>>>>> Yup, then it's a problem with your Wi-Fi. > >>>>>>>>>> Kumar Bibek > >>>>>>>>>>http://techdroid.kbeanie.com > >>>>>>>>>>http://www.kbeanie.com > >>>>>>>>>> On Thu, Jan 13, 2011 at 1:07 AM, Ankur Avlani< > >>>> [email protected] > >>>>>>> wrote: > >>>>>>>>>>> I am connected to network, I am on Wifi. If i try again it > >>>> works. > >>>>>> Its > >>>>>>>>>>> just random. > >>>>>>>>>>> On Wed, Jan 12, 2011 at 11:34 AM, Kumar Bibek< > >>>> [email protected] > >>>>>>> wrote: > >>>>>>>>>>>> This error/exception comes because of no network connectivity. > >>>>>>>>>>>> Kumar Bibek > >>>>>>>>>>>>http://techdroid.kbeanie.com > >>>>>>>>>>>>http://www.kbeanie.com > >>>>>>>>>>>> On Thu, Jan 13, 2011 at 1:02 AM, Ankur Avlani< > >>>>>> [email protected]>wrote: > >>>>>>>>>>>>> Hi All, > >>>>>>>>>>>>> I am developing an application on Android. I have seen that > >>>> at > >>>>>> times > >>>>>>>>>>>>> when I try to connect using HttpURLConnection, for getting an > >>>>>> Image or > >>>>>>>>>>>>> anydata, I get the following error: > >>>>>>>>>>>>> 01-12 11:24:05.073: WARN/System.err(16780): > >>>>>>>>>>>>> java.net.UnknownHostException: Host is unresolved: > >>>>www.XXX.com:80. > >>>>>>>>>>>>> Note: I get this error on my Motorolla Droid and not in > >>>> emulator. > >>>>>>>>>>>>> Any ideas? > >>>>>>>>>>>>> Thanks, > >>>>>>>>>>>>> Ankur > >>>>>>>>>>>>> -- > >>>>>>>>>>>>> You received this message because you are subscribed to the > >>>> Google > >>>>>>>>>>>>> Groups "Android Developers" group. > >>>>>>>>>>>>> To post to this group, send email to > >>>>>>>>>>>>> [email protected] > >>>>>>>>>>>>> To unsubscribe from this group, send email to > >>>>>>>>>>>>> [email protected]<android-developers%2Bunsubs > >>>>>>>>>>>>> [email protected]><android-developers%2Bunsubs > >>>> [email protected]><android-developers%2Bunsubs > >>>>>> [email protected]> > >>>>>>>>>>>>> For more options, visit this group at > >>>>>>>>>>>>>http://groups.google.com/group/android-developers?hl=en > >>>>>>>>>>>> -- > >>>>>>>>>>>> You received this message because you are subscribed to the > >>>> Google > >>>>>>>>>>>> Groups "Android Developers" group. > >>>>>>>>>>>> To post to this group, send email to > >>>>>>>>>>>> [email protected] > >>>>>>>>>>>> To unsubscribe from this group, send email to > >>>>>>>>>>>> [email protected]<android-developers%2Bunsubs > >>>>>>>>>>>> [email protected]><android-developers%2Bunsubs > >>>> [email protected]><android-developers%2Bunsubs > >>>>>> [email protected]> > >>>>>>>>>>>> For more options, visit this group at > >>>>>>>>>>>>http://groups.google.com/group/android-developers?hl=en > >>>>>>>>>>> -- > >>>>>>>>>>> You received this message because you are subscribed to the > >>>> Google > >>>>>>>>>>> Groups "Android Developers" group. > >>>>>>>>>>> To post to this group, send email to > >>>>>>>>>>> [email protected] > >>>>>>>>>>> To unsubscribe from this group, send email to > >>>>>>>>>>> [email protected]<android-developers%2Bunsubs > >>>>>>>>>>> [email protected]><android-developers%2Bunsubs > >>>> [email protected]><android-developers%2Bunsubs > >>>>>> [email protected]> > >>>>>>>>>>> For more options, visit this group at > >>>>>>>>>>>http://groups.google.com/group/android-developers?hl=en > >>>>>>>>>> -- > >>>>>>>>>> You received this message because you are subscribed to the > >>>> Google > >>>>>>>>>> Groups "Android Developers" group. > >>>>>>>>>> To post to this group, send email to > >>>>>> [email protected] > >>>>>>>>>> To unsubscribe from this group, send email to > >>>>>>>>>> [email protected]<android-developers%2Bunsubs > >>>>>>>>>> [email protected]><android-developers%2Bunsubs > >>>> [email protected]><android-developers%2Bunsubs > >>>>>> [email protected]> > >>>>>>>>>> For more options, visit this group at > >>>>>>>>>>http://groups.google.com/group/android-developers?hl=en > >>>>>>>>> -- > >>>>>>>>> You received this message because you are subscribed to the Google > >>>>>>>>> Groups "Android Developers" group. > >>>>>>>>> To post to this group, send email to > >>>>>> [email protected] > >>>>>>>>> To unsubscribe from this group, send email to > >>>>>>>>> [email protected]<android-developers%2Bunsubs > >>>>>>>>> [email protected]><android-developers%2Bunsubs > >>>> [email protected]><android-developers%2Bunsubs > >>>>>> [email protected]> > >>>>>>>>> For more options, visit this group at > >>>>>>>>>http://groups.google.com/group/android-developers?hl=en > >>>>>>>> -- > >>>>>>>> You received this message because you are subscribed to the Google > >>>>>>>> Groups "Android Developers" group. > >>>>>>>> To post to this group, send email to > >>>>>> [email protected] > >>>>>>>> To unsubscribe from this group, send email to... > > read more » -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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