Message Title

Changing the build time bytecode enhancement method to the hibernate-enhance-maven-plugin seems to resolve the problem.

So as a workaround, replace the maven-antrun-plugin plugin with the following code fragment:

<plugin>
  <groupId>org.hibernate.orm.tooling</groupId>
  <artifactId>hibernate-enhance-maven-plugin</artifactId>
  <version>${hibernate.version}</version>
  <dependencies>
    <!-- Yes, you really must have an explicit dependency on the thing you want to enhance -->
    <dependency>
      <groupId>${project.groupId}</groupId>
      <artifactId>${project.artifactId}</artifactId>
      <version>${project.version}</version>
    </dependency>
    <!-- Provide javax.transaction.SystemException -->
    <dependency>
      <groupId>javax.transaction</groupId>
      <artifactId>jta</artifactId>
      <version>1.1</version>
    </dependency>
  </dependencies>
  <executions>
    <execution>
      <phase>compile</phase>
      <goals>
        <goal>enhance</goal>
      </goals>
    </execution>
  </executions>
</plugin>