Connection leaks with SqlServer Storage

I have created an application with server component. The server component implemented with Hangfire to execute the scheduled reports. It has a recurring job which checks is triggered every five minutes to see if any report to be executed within next 5 minutes, if yes, it creates the number of tasks for each report to be executed.
I ran the server component with only recurring job (executing every 5 minutes) with no other report scheduled to be executed but still gets the exception of connection pool. Please note that I am using log4net library to log the events with Hangfire.
Any help is appreciated.