why java.net.UnknownHostException: Host is unresolved: webservername.com:80?

Question

I m implementing android app in that I m working on web api. Sometimes my app gets connected to webserver but sometimes it throws exception as java.net.UnknownHostException: Host is unresolved: webservername.com:80. I m fetching json response from api.

I m using fetching code as following:

    String queryResult  =   null;
    HttpClient client = new DefaultHttpClient();
    HttpGet request = new HttpGet();
    try {
            request.setURI(new URI(archiveQuery));
    } catch (URISyntaxException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    //HttpResponse response = client.execute(request, new BasicResponseHandler());
            try {
                queryResult =   client.execute(request, new BasicResponseHandler());
            }
            catch (ClientProtocolException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

running in emulator/device check whether the broswer can open any site,internet connection is slow or not available...this you might be running in emulator..and emulator didn't got net connection so this happend — MKJParekh
– MKJParekh, Commented Dec 27, 2011 at 9:15
change your hostname to host ip address, that should solve your problem. — Mukunda
– Mukunda, Commented Jan 30, 2012 at 12:00

Vicente Plata · Accepted Answer · 2011-04-25 01:00:50Z

0

I think it's a DNS issue of your server, according to your comments. Sometimes you ping, sometimes you don't, but on your browser it always work? Surely it's a server connectivity issue.

answered Apr 25, 2011 at 1:00

Vicente Plata

3,3801 gold badge21 silver badges26 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Vishakha Kinjawadekar Over a year ago

yes, it may be the device network connectivity on which I am running the application.

Mukunda Over a year ago

change your hostname to host ip address, that should solve your problem.

Community · Accepted Answer · 2017-05-23 12:27:59Z

0

The Answer is really very simple. You need to Restart the emulator.Check out this

edited May 23, 2017 at 12:27

CommunityBot

11 silver badge

answered May 24, 2012 at 9:36

Nishant

32.2k5 gold badges41 silver badges54 bronze badges

Comments

Sushil Lakra · Accepted Answer · 2013-04-27 08:45:01Z

0

Just restart adb, find adb.exe in your adt bundle and double click it. Some shit will happen on command prompt, and there you go, restart your emulator and it should work fine,

answered Apr 27, 2013 at 8:45

Sushil Lakra

673 silver badges7 bronze badges

Collectives™ on Stack Overflow

why java.net.UnknownHostException: Host is unresolved: webservername.com:80?

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related