Archer

Here’s a very weird Maven/Java issue. The error message (below) occurs in my build phase where JaxB is called to produce some Java objects from XML. JaxB calls HyperJaxB, and on some systems it crashes. [ERROR] XJC while compiling schema(s): org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log Caused by: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log ...

In this example an InvestigationType has many SampleType’s. If I load an InvestigationType via em (entity manager) find it also loads the samples. InvestigationType inv2 = (InvestigationType) em.find( InvestigationType.class, inv.getId()); System.out.println(“Inv2 ID="+inv2.getId()); System.out.println(“Inv2 Title="+inv2.getTitle()); assertTrue(inv2.getSample().size() == 2); However, if I load a SampleType the investigation field is null, unless I refresh the object. // Get a sample SampleType s3 = (SampleType) em.find( SampleType.class, inv2.getSample().get(0).getId()); em.refresh(s3); System.out.println(convertDataToXmlString(s3)); InvestigationType inv3 = s3.getInvestigation(); assertNotNull(inv3); From my understanding I should not have to do this as the fetching should be the same in both instances, ie resolving the parent by default. Similarly, if I query for both objects the references are correctly loaded. ...