setRequestProperty throwing java.lang.IllegalStateException: Cannot set request property after connection is made

Question

I am getting java.lang.IllegalStateException:

java.lang.IllegalStateException: Cannot set request property after connection is made error w

Answer 1

I'm having the same issue. I was observing this issue on Nexus 5. Code of my app constantly fails with the same exception (or its twin brother "cannot set request method ..")

What I've observed that it happens if i leave phone for a while. One it starts failing it fails all the time - but if i restart phone/emulator it's ok once again).

My suspicion is its either some bug in connection pooling on framework side, or somewhere in code resources are leaked.

Answer 2

I was getting the same exception on setRequestProperty("Range","byte=" + downloadedSize + "-") . After adding connection.setChunkedStreamingMode(0); the issue disappeared

Answer 3

i found the problem it's about ordering the code, if you are trying to add header and post parameters both, it's important to be careful about this

HttpURLConnection connection = (HttpURLConnection) urlConnection;

////        Add Request Headers
for (NameValuePair nvp :
         request[0].getHeaderParams()) {
     connection.setRequestProperty(nvp.getName(),nvp.getValue());
     }
// done

connection.setDoInput(true);
connection.setDoOutput(true);
connection.setRequestMethod("POST");
////         Add Post Parameters
OutputStream outputStream = urlConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream));
List<NameValuePair> params = new ArrayList<>(request[0].getPostParams());
bufferedWriter.write(getQuery(params));

// done
connection.setConnectTimeout(3000);
connection.setReadTimeout(3000);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.flush();
outputStream.close();
connection.connect();

in here, i have added header parameters then set setDoInput and setDoOutput then setRequestMethod and finally you can add POST parameters. i don't know what is wrong with setRequestMethod but i think its preparing the connection by opening it or something and that's why it throws exception

Answer 4

not invoke setRequestProperty after write byte to OutputStream.

OutputStream os = connection.getOutputStream();
os.write("k=v".getBytes());
os.close();

you should invoke setRequestProperty above the code

Answer 5

I only have this issue while in debugging mode, Run without debugging (You can print logs) everything should work fine

Answer 6

This usually happens if you have in the debug watchers calls, such as conn.getResponseCode() or anything that queries the request result before the request was actually issued or completed. This causes, that during debug, a request is performed by the watcher, before having properly set you request, and then it becomes invalid.