HttpClient execute keeps giving ConnectTimeoutException

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I have this very big bug in my application that I really can't seem to solve. Whenever I make a rest call via the following code:

  HttpGet request = new HttpGet(url + getParams());

  HttpParams httpParameters = new BasicHttpParams();
  HttpConnectionParams.setConnectionTimeout(httpParameters, 5000);
  HttpConnectionParams.setSoTimeout(httpParameters, 10000);

  DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);

  httpClient.execute(request);

I get the error in DDMS:

07-15 11:22:47.448: WARN/System.err(973): org.apache.http.conn.ConnectTimeoutException: Connect to (some ip-address) timed out

But sometimes the code works perfect and I receive my data as it should. I also tested the rest server call via a normal webbrowser on my computer and that always gives back my data within 100ms. So what am I doing wrong? I also tested it on another device, but that gives me the same problem. I would be SO glad if somebody could solve my problem :)

Rush answered 15/7, 2011 at 9:37 Comment(5)

This probably has to do with a slow network (are you using Wi-Fi or 3G?). Try running it in the emulator. You may need to increase the connection timeout and set up a retry mechanism. – Hire 15/7, 2011 at 9:46

Yeah but with my other apps I can get the requested data all the time. And with one of the phones I am using WiFi, but that one gives me exceptions either. And as far as I know, The httpclient has an automatic retry mechanism? – Rush 15/7, 2011 at 9:52

Increase the timeout to 20-30 seconds. At times, the line may be busy and hence the timeout. – Fae 15/7, 2011 at 9:53

Alright, I increased the timeout to 20 seconds: HttpConnectionParams.setConnectionTimeout(httpParameters, 20000); HttpConnectionParams.setSoTimeout(httpParameters, 20000); But I still have the same situation, the data gets loaded very rarely and mostly it doesn't receive anything – Rush 15/7, 2011 at 9:59

Hey Martijn538 Did you find the solution for your issue with timeouts? – Erato 16/3, 2012 at 11:40

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The problem is the DefaultHttpClient. Are you using it asynchronously? Since the DefaultHttpClient is not thread-safe, using it in an asynchronous environment might cause a problem. I've had this problem before when my activity started multiple Http connection at the same time and i ended up changing it to use HttpURLConnection. You can refer to this site: http://www.vogella.de/articles/AndroidNetworking/article.html

Curb answered 13/1, 2012 at 1:35 Comment(0)

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I having the same issue.

Try using direct IP for your requests. I noticed that Android DNS lookups behave quite weird sometimes. I searched and found this : http://mailinglists.945824.n3.nabble.com/Android-and-reverse-DNS-lookup-issues-td3011461.html .

Dunno if it's relevant or not, i'm still trying to find a workaround. Maybe someone here can take a look and figure it out.

Cypress answered 5/8, 2011 at 8:57 Comment(1)

Had the exact same issue after I changed my hosts-file. A reboot of the phone solved the problem. – Carder 3/4, 2012 at 10:21

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Check if you are able to connect using your development machine, Also check the load times. There is a very good chance your timeouts are way too small.

Ablaut answered 15/7, 2011 at 10:12 Comment(3)

I changed the timeouts to 20 seconds, still the same problem.. What more can I try? Haven't anybody ran into this problem before? – Rush 15/7, 2011 at 10:17

Can you access the URL view your dev machine? – Ablaut 15/7, 2011 at 10:30

Yeah, but the problem is: sometimes it's loading good and in time and sometimes it doesn't seem to load at all! – Rush 15/7, 2011 at 10:46

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Had a similar issue, could be reproduced only when trying to connect using several devices simultaneously and the solution was:

Instance reboot solved problem with connections. (or just need to restart networking service)

(c) My server/instance admin

Also, there are people who experience similar issues and some other solutions worked for them, for instance:

Disable tcp_timestamp
Disable tcp_tw_reuse & tcp_tw_recycle
Enabled vm save mode in Android manifest: android:vmSafeMode="true"

Beniamino answered 29/10, 2015 at 8:17 Comment(0)

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