BUG #11680: PostgreSQL JDBC Driver issue

The following bug has been logged on the website:

Bug reference: 11680
Logged by: Kent Johnson
Email address: kentoj(at)gmail(dot)com
PostgreSQL version: 9.3.1
Operating system: Mac OS X
Description:

When using the PostgreSQL JDBC driver in my project i get a weird error
stating "Unexpected error trying to gauge level of JDBC REF_CURSOR support :
null"

It causes my application to hang when starting up for anywhere between
eighty to three hundred seconds. After startup everything works fine. I am
using the following driver version:

(Gradle Dependency style)
'org.postgresql:postgresql:9.3-1102-jdbc41'

My application is a Spring Boot application and the hanging happens upon
starting that application.

I saw the error after turning on Hibernate logging. The full log is at the
following paste.

http://pastebin.com/CAjSyQw9

Does this sort of an error seem like an issue with the JDBC driver?