[hibernate-issues] [Hibernate-JIRA] Commented: (HV-438) Call to TraversableResolver.isReachable() threw an exception

Call to TraversableResolver.isReachable() threw an exception ------------------------------------------------------------ Key: HV-438 URL: http://opensource.atlassian.com/projects/hibernate/browse/HV-438 Project: Hibernate Validator Issue Type: Bug Components: engine Affects Versions: 4.1.0.Final, 4.2.0.Beta1 Environment: hibernate 3.6.1.Final and hibernate validator 4.1.0.Final, GlassFish Server Open Source Edition 3.0.1, Spring 3.0.5 Reporter: Denis Chapligin I have a problem with custom class level constraint. When I try to validate a simple entity, like: {code} @Entity @Table(name="users") @Unique //My custom constraint public class User implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name="id") private Integer id; } {code} using a spring validation helper: {code} User u = new User(); Errors result = new BindException(u, "User"); validator.validate(u, result); {code} It throws a {{NullPointerException}}: {noformat} Caused by: java.lang.NullPointerException at java.lang.Class.searchFields(Class.java:2599) at java.lang.Class.getDeclaredField(Class.java:1880) at org.hibernate.ejb.util.PersistenceUtilHelper$MetadataCache.findMember(PersistenceUtilHelper.java:190) at org.hibernate.ejb.util.PersistenceUtilHelper$MetadataCache.getMember(PersistenceUtilHelper.java:178) at org.hibernate.ejb.util.PersistenceUtilHelper.get(PersistenceUtilHelper.java:91) at org.hibernate.ejb.util.PersistenceUtilHelper.isLoadedWithReference(PersistenceUtilHelper.java:83) at org.hibernate.ejb.HibernatePersistence$1.isLoadedWithReference(HibernatePersistence.java:93) at javax.persistence.Persistence$PersistenceUtilImpl.isLoaded(Persistence.java:120) at org.hibernate.validator.engine.resolver.JPATraversableResolver.isReachable(JPATraversableResolver.java:33) at org.hibernate.validator.engine.resolver.DefaultTraversableResolver.isReachable(DefaultTraversableResolver.java:112) at org.hibernate.validator.engine.resolver.SingleThreadCachedTraversableResolver.isReachable(SingleThreadCachedTraversableResolver.java:47) at org.hibernate.validator.engine.ValidatorImpl.isValidationRequired(ValidatorImpl.java:764) {noformat} Some investigation revealed, that in PersistenceUtil calls the 'property' parameter value is null and in the validator.engine functions 'name' var in value of the first and single entry of propertyPath.nodeList is null too. Most interested thing is that when i try validation code, shown above, in JUnit environment, it works well. I've attached a simple webapp, that reproduces the issue. It is too big, to be uploaded here, so i put it to the dropbox: http://dl.dropbox.com/u/17691684/hvbug.tar.gz Initial report was on hibernate forums: https://forum.hibernate.org/viewtopic.php?f=9&t=1009612&start=0