Michal Letynski created DROOLS-968: -------------------------------------- Summary: Random Nullpointer Key: DROOLS-968 URL: https://issues.jboss.org/browse/DROOLS-968 Project: Drools Issue Type: Bug Affects Versions: 5.6.0.Final Environment: Windows, Jetty Reporter: Michal Letynski Assignee: Mark Proctor Stacktrace: java.lang.NullPointerException at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:155) at org.drools.base.evaluators.EvaluatorRegistry.<init>(EvaluatorRegistry.java:77) at org.drools.compiler.PackageBuilderConfiguration.buildEvaluatorRegistry(PackageBuilderConfiguration.java:544) at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:196) at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:170) at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:308) at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:236) And my code is a simple object creation: PackageBuilder packageBuilder = new PackageBuilder(); Any hint why this might occur ? Or should i just ignore it because on production we have Glassfish server ? -- This message was sent by Atlassian JIRA (v6.4.11#64026)