Unrecognized SSL message plaintext connection Exception

Question

I have a java compile package to speak with the https server on the net. Running the compilation gives the following exception:

javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection? 
at com.sun.net.ssl.internal.ssl.InputRecord.handleUnknownRecord(Unknown Source) 
at com.sun.net.ssl.internal.ssl.InputRecord.read(Unknown Source) 
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source) 
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source) 
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source) 
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source) 
at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source) 
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source) at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)

I think this is due to the reason that the connection established with the client machine is not secure and hence, is there any way to configure the local machines in order to connect to the remote https server?

Answer 1

It is due to the fact that you are talking to an HTTP server, not an HTTPS server. Probably you didn't use the correct port number for HTTPS.