@Entity
@Inheritance(strategy = InheritanceType.JOINED)
public class Person implements Serializable {

    @Id
    @GeneratedValue
    private Long id;

    @Column
    private String name;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Person person = (Person) o;
        return id.equals(person.id);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }
}

@Entity
public class Employee extends Person {

    @Column
    private String role;

    public String getRole() {
        return role;
    }

    public void setRole(String role) {
        this.role = role;
    }
}

<persistence>
    <persistence-unit name="javaee8">

        <jta-data-source>MSSQLDS</jta-data-source>
        <properties>
            <property name="javax.persistence.schema-generation.database.action" value="update" />
        </properties>
        <class&gt;net.rhuanrocha.entity.Employee</class&gt;
        <class&gt;net.rhuanrocha.entity.Person</class&gt;
        <exclude-unlisted-classes>true</exclude-unlisted-classes>
        <properties>
            <property name="hibernate.jdbc.batch_size" value="50" />
            <property name="hibernate.connection.isolation" value="2" />
            <property name="hibernate.id.new_generator_mappings" value="false" />
            <property name="hibernate.hbm2ddl.jdbc_metadata_extraction_strategy" value="individually" />
        </properties>

    </persistence-unit>
</persistence>

14:51:40,743 DEBUG [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-1) could not log warnings: java.sql.SQLException: IJ031070: Transaction cannot proceed: STATUS_COMMITTED
	at org.jboss.jca.adapters.jdbc.WrapperDataSource.checkTransactionActive(WrapperDataSource.java:248)
	at org.jboss.jca.adapters.jdbc.WrappedConnection.checkTransactionActive(WrappedConnection.java:1933)
	at org.jboss.jca.adapters.jdbc.WrappedConnection.checkStatus(WrappedConnection.java:1948)
	at org.jboss.jca.adapters.jdbc.WrappedConnection.checkTransaction(WrappedConnection.java:1922)
	at org.jboss.jca.adapters.jdbc.WrappedConnection.getWarnings(WrappedConnection.java:1064)
	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.handleAndClearWarnings(SqlExceptionHelper.java:290)
	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.logAndClearWarnings(SqlExceptionHelper.java:269)
	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.releaseConnection(LogicalConnectionManagedImpl.java:194)
	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.afterStatement(LogicalConnectionManagedImpl.java:149)
	at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.afterStatementExecution(JdbcCoordinatorImpl.java:279)
	at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.releaseStatements(AbstractBatchImpl.java:158)
	at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.release(AbstractBatchImpl.java:195)
	at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.close(JdbcCoordinatorImpl.java:184)
	at org.hibernate.internal.AbstractSharedSessionContract.close(AbstractSharedSessionContract.java:324)
	at org.hibernate.internal.SessionImpl.closeWithoutOpenChecks(SessionImpl.java:432)
	at org.hibernate.internal.SessionImpl.close(SessionImpl.java:418)
	at org.jboss.as.jpa.transaction.TransactionUtil$SessionSynchronization.safeCloseEntityManager(TransactionUtil.java:181)
	at org.jboss.as.jpa.transaction.TransactionUtil$SessionSynchronization.afterCompletion(TransactionUtil.java:163)
	at org.jboss.as.txn.service.internal.tsr.JCAOrderedLastSynchronizationList.afterCompletion(JCAOrderedLastSynchronizationList.java:144)