How can I log the SSL layer with the Apache HTTP server classes

Question

I have a custom application that is using httpcomponents-core-4.2.4 and the SSLContext/SSLEngine with Oracle JDK to enable https.

It works fine in Windows/OSX environments.

However, it does not work in Ubuntu 12.04 with OpenJDK.

How can I enable logging for the HTTP components or the SSL classes, since they do not provide anything to log4j logs, although the client side httpcomponents do.

I found that there is an internal Debug instance in SSLEngineImpl, but how do I enable it?

Answer 1

OK, found it out. I guess I had to write the question to really get onto it. This does it:

java -Djavax.net.debug=all

The full guide is here