We are using apex:actionFunction to run a method every minute. We get a common.util.database.connectionpooltimeoutexception from time to time. How do we catch the exception so it doesn't break the window? 

The full error is:
common.util.database.connectionpooltimeoutexception. Request Timed out waiting for connection:[config 200ms, actual 201ms]

I am trying to test the new feature in Spring where you can use API to create a new trialforce org. In the example (java) provided, it's using the class SignupRequestInfo. But where/how do I get the jar file for this class? I tried generating jar for tooling WSDL, Apex WSDL, Partner WSDL, but none of them contain this class. Anyone can help me?