Database Connection Pool - Not releasing resources in JBoss EAP?

Issue

• We are using a OracleRAC as the backend database for JBoss and have a min connection size of 5 and maximum connection size of 100.  We are noticing that the connections are not being reused on the database and even though there are only 1/2 active sessions, there are nearly 100 inactive sessions on the database. Is there a timeout or other parameter we have to put into the config file?