SocketException when connecting to HttpURLConnection after accessing HttpsURLConnection

Question

I have a function which uses an HttpUrlConnection to call up a service on a remote client. This function works fine, until we added a new secure remote client which can only be called using HttpsUrlConnection.

Calling the new https remote client works fine, after calling the new client, the old client will return a java.net.SocketException: Connection reset when trying to get the InputStream object.

My code look something like this:

conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty("Content-Type", "application/json");
conn.setDoOutput(true);
conn.setRequestMethod("POST");
out = conn.getOutputStream();
writer = new OutputStreamWriter(out);
writer.write(strJson);
writer.close();
in = conn.getInputStream();  // connection reset error here.
reader = new InputStreamReader(in);
rd = new BufferedReader(reader);
while ((line = rd.readLine()) != null) {
    result += line;
}
rd.close();
in.close();
reader.close();
out.close();
conn.disconnect();

Anyone have a clue what happened? Thank you in advance.

The stack trace is like so:

java.net.SocketException: Connection reset 
   at java.net.SocketInputStream.read(SocketInputStream.java:196)
   at java.net.SocketInputStream.read(SocketInputStream.java:122)
   at sun.security.ssl.InputRecord.readFully(InputRecord.java:442)
   at sun.security.ssl.InputRecord.read(InputRecord.java:480)
   at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:934)
   at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:891)
   at sun.security.ssl.AppInputStream.read(AppInputStream.java:102)
   at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
   at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
   at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
   at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:690)
   at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
   at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:661)
   at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1324)
   at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)

Answer 1

I still don't know what caused the error to happen. My solution is just to not use the java.net.HttpURLConnection, and use org.apache.http.impl.client.DefaultHttpClient instead.