Why does SSL handshake give 'Could not generate DH keypair' exception?

Question

When I make an SSL connection with some IRC servers (but not others - presumably due to the server\'s preferred encryption method) I get the following exception:

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Answer 1

For me, the following command line fixed the issue:

java -jar -Dhttps.protocols=TLSv1.2 -Ddeployment.security.TLSv1.2=true -Djavax.net.debug=ssl:handshake XXXXX.jar

I am using JDK 1.7.0_79