HttpClient execute keeps giving ConnectTimeoutException

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 :)

Steven Xiao Xu Pen

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

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.

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.

GregoryK

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)

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"

来源：https://stackoverflow.com/questions/6705170/httpclient-execute-keeps-giving-connecttimeoutexception

标签

android

rest

httpclient

http-get

connection-timeout