How to troubleshoot Floating license server

Our floating license server on Mac stopped accepting requests and I was unable to connect to the license server remotely using the Management console - the console app replied with rmi://localhost unable to connect. I could go to the server and run the Management console locally but it would not accept remote connections.

I looked through the error_log and access_log and didn't see anything that indicated errors.

Once I restarted the license server then SoapUI users could obtain licenses and I could run the Admin console remotely and connect to the license server.

How do I go about troubleshooting this further?

Is anyway to turn on debug?

System info

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OS:  MacOS 10.9.5

License server:  ProtectionLS_4.6.2

Java: 

  java version "1.7.0_75"
  Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
  Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)