NPE in ObjectEqualsComparator ----------------------------- Key: JBRULES-1429 URL: http://jira.jboss.com/jira/browse/JBRULES-1429 Project: JBoss Drools Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 4.0.4 Environment: Any. Reporter: Serge Brisson This NPE occurs when an object is updated and one of its fields becomes non-null (was null before). This problem is new in 4.0.4 and was absent in 4.0.3. The org.drools.base.evaluators.ObjectFactory$ObjectEqualsComparator#equals method begins with: if ( arg0 == null ) { return arg1 == null; } if( arg1 != null && arg1 instanceof ShadowProxy ) { return arg1.equals( arg0 ); } where is should be: if ( arg0 == null ) { return arg1 == null; } if (arg1 == null) { return false; } if (arg1 instanceof ShadowProxy ) { return arg1.equals( arg0 ); } Note: the NPE occurs later in this method when a method of arg1 is called. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira