java.sql.SQLException: You cannot commit during a managed transaction! error when using Hibernate in JBoss EAP

Issue

... javax.persistence.PersistenceException: org.hibernate.TransactionException: commit failed
    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1387)
    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1310)
    at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:80)
    ... 22 more
Caused by: org.hibernate.TransactionException: commit failed
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:185)
    at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:75)
    ... 22 more
Caused by: org.hibernate.TransactionException: unable to commit against JDBC connection
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doCommit(JdbcTransaction.java:116)
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:178)
    ... 23 more
Caused by: java.sql.SQLException: You cannot commit during a managed transaction!
    at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.jdbcCommit(BaseWrapperManagedConnection.java:1064)
    at org.jboss.jca.adapters.jdbc.WrappedConnection.commit(WrappedConnection.java:759)
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doCommit(JdbcTransaction.java:112)
    ...