"IJ000100: Closing a connection for you. Please close them yourself" message after enabling debug on the CachedConnectionManager in JPP 6

Issue

We configured lazing loading to true for hibernate for IDM connections in $JPP_HOME/gatein/gatein.ear/portal.war/WEB-INF/conf/organization/picketlink-idm/picketlink-idm-config.xml:

          <option>
            <name>lazyStartOfHibernateTransaction</name>
            <value>true</value>
          </option>

Now we noticed the following stacktraces in the log files:

[org.jboss.jca.core.api.connectionmanager.ccm.CachedConnectionManager]  IJ000100: Closing a connection for you. Please close them yourself: org.jboss.jca.adapters.jdbc.jdk6.WrappedConnectionJDK6@565329db: java.lang.Throwable: STACKTRACE
        at org.jboss.jca.core.connectionmanager.ccm.CachedConnectionManagerImpl.registerConnection(CachedConnectionManagerImpl.java:269)
        at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:495)
        at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:139)
        at org.hibernate.service.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:141)
        at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:292)
        at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:214)
        at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:157)
        at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:67)
        at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:160)
        at org.picketlink.idm.impl.store.hibernate.HibernateIdentityStoreSessionImpl.startHibernateTransaction(HibernateIdentityStoreSessionImpl.java:207)
        at org.picketlink.idm.impl.store.hibernate.HibernateIdentityStoreSessionImpl.startHibernateTransactionIfNotStartedYet(HibernateIdentityStoreSessionImpl.java:195)
        at org.picketlink.idm.impl.store.hibernate.HibernateIdentityStoreImpl.getHibernateSession(HibernateIdentityStoreImpl.java:2786)
        at org.picketlink.idm.impl.store.hibernate.HibernateIdentityStoreImpl.getHibernateIdentityObjectType(HibernateIdentityStoreImpl.java:2850)
        at org.picketlink.idm.impl.store.hibernate.HibernateIdentityStoreImpl.getHibernateIdentityObject(HibernateIdentityStoreImpl.java:2896)
        at org.picketlink.idm.impl.store.hibernate.HibernateIdentityStoreImpl.safeGet(HibernateIdentityStoreImpl.java:2821)
        at org.picketlink.idm.impl.store.hibernate.HibernateIdentityStoreImpl.findIdentityObject(HibernateIdentityStoreImpl.java:684)
        at org.picketlink.idm.impl.repository.AbstractIdentityStoreRepository.hasIdentityObject(AbstractIdentityStoreRepository.java:441)
        at org.picketlink.idm.impl.repository.FallbackIdentityStoreRepository.resolveRelationships(FallbackIdentityStoreRepository.java:1268)
        at org.picketlink.idm.impl.api.session.managers.RoleManagerImpl.findRoles(RoleManagerImpl.java:935)
        at org.picketlink.idm.impl.api.session.managers.RoleManagerImpl.findRoles(RoleManagerImpl.java:999)
        at org.picketlink.idm.impl.api.session.managers.RoleManagerImpl.findRoles(RoleManagerImpl.java:1004)
        at org.exoplatform.services.organization.idm.MembershipDAOImpl.findMembershipsByUser(MembershipDAOImpl.java:497) [exo.portal.component.identity-3.6.5.Final-redhat-1.jar:3.6.5.Final-redhat-1]

What can be done to get rid of these stacktraces?