Enterprise Dashboard Error [Thread-18] Timeout: Pool empty. Unable to fetch a connection in 30 seconds, none available

Enterprise Dashboard is getting hung up from time to time.

Getting this error in the enterprisedashboard.log file: 

2017-09-05 05:01:02,051Z (01:01) [Thread-18] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - [Thread-18] Timeout: Pool empty. Unable to fetch a connection in 30 seconds, none available[size:100; busy:100; idle:0; lastwait:30000]. 

2017-09-05 05:01:02,051Z (01:01) [Thread-18] ERROR com.ca.dradis.BeanProcessor - Exception 

org.hibernate.exception.GenericJDBCException: could not prepare statement 

Enterprise Dashboard losing connection to the external database.

Please open a new Support Case.

In the support case please provide the following information:

1. What external database you are using with DevTest.

2. How many Registries are connected to your Enterprise Dashboard?

3. How many users are using DevTest in this environment?