How retry works in Azure Service Bus Java

Hello Experts,

          I'm new to service bus, I'm curious about RetryPolicy and how it works, as per the documentation, retry had happened automatically for transient exceptions(MessagingExcepitons, ServerBusy), and the default retry count is 3, but we can set out custom retry policy using RetryExponential class. I want to see the logs does the RetryPolicy did actually trying  to connect or not when exception ouccres. How can I check this, how to replicate  MessagingExcepitons, ServerBusy exceptions , so that I can see the logs. 

Can any one help me to understand this. Thanks in advance