Cached connection manager debug forcing closed connections unexpectedly

Using a version of Hibernate configured to obtain and keep connections for long periods (e.g. until transaction end instead of the default behavior for all current Hibernate releases which is to release connections immediately after use). An EJB method marked transaction REQUIRED calls another EJB method (via the remote interface) which is also marked REQUIRED . A connection is obtained by Hibernate within the "inner" REQUIRED method. Though the entity manager is valid and may be used later in the "outer" method, the connection obtained during the inner method is reported as leaked: ... IJ000100: Closing a connection for you. Please close them yourself: org.jboss.jca.adapters.jdbc.jdk8.WrappedConnectionJDK8... Subsequently, using the Hibernate entity manager fails due to the invalidation of the connection: ... java.sql.SQLException: IJ031040: Connection is not associated with a managed connection: org.jboss.jca.adapters.jdbc.jdk8.WrappedConnectionJDK8... Note this is NOT reproducible when either of the following are true: Using the default configuration for current Hibernate releases (Hibernate 3 or later) Using the EJB local interface to call the inner method