NPE if method getClassLoader() returns null to represent the bootstrap class loader ----------------------------------------------------------------------------------- Key: JBWEB-293 URL: https://issues.jboss.org/browse/JBWEB-293 Project: JBoss Web Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: JBossWeb-2.1.14.GA Reporter: Chao Wang Assignee: Chao Wang Attachments: JBWEB-293.patch from the scenario in [JBPAPP-11027|https://issues.jboss.org/browse/JBPAPP-11027] , and java code in java/javax/el/BeanELResolver.java : {code:title=BeanELResolver.java|borderStyle=solid} Iterator<Class<?>> iter = cache.keySet().iterator(); while (iter.hasNext()) { Class<?> key = iter.next(); BeanProperties bp = cache.get(key); if(bp.getType().getClassLoader().equals(classloader)){ iter.remove(); } } {code} Here, when key is "class java.lang.Class" and bp's type is "class java.lang.Class", method getClassLoader() returns null to represent the bootstrap class loader, then NPE as described is threw during stopping service jboss.web {noformat} cache content: class org.jboss.on.embedded.bean.ResourceListItem=javax.el.BeanELResolver$BeanProperties@36d4423d, class org.jboss.on.embedded.ui.NavigationAction_$$_javassist_seam_9=javax.el.BeanELResolver$BeanProperties@2948ceea, class org.jboss.on.embedded.ui.ResourceAction_$$_javassist_seam_12=javax.el.BeanELResolver$BeanProperties@6b0879d2, class org.jboss.on.embedded.ui.nav.SubCategoryTreeNode=javax.el.BeanELResolver$BeanProperties@797600e3, class org.jboss.on.embedded.ui.nav.PlatformResourceTreeNode=javax.el.BeanELResolver$BeanProperties@32347561, class java.lang.Class=javax.el.BeanELResolver$BeanProperties@12064d07, class org.jboss.on.embedded.ui.nav.SingletonResourceTypeTreeNode=javax.el.BeanELResolver$BeanProperties@5bab0fcf, class org.jboss.on.embedded.ui.nav.ResourceTreeNode=javax.el.BeanELResolver$BeanProperties@3b9b0e0d, class org.jboss.on.embedded.ui.nav.NonSingletonResourceTypeTreeNode=javax.el.BeanELResolver$BeanProperties@40b7960d, class org.rhq.core.domain.measurement.MeasurementDefinition=javax.el.BeanELResolver$BeanProperties@54dc50ac, class org.rhq.core.domain.resource.Resource=javax.el.BeanELResolver$BeanProperties@4c3477ba, class org.rhq.core.domain.measurement.MeasurementDataTrait=javax.el.BeanELResolver$BeanProperties@8a07b6c, class org.jboss.seam.security.Identity=javax.el.BeanELResolver$BeanProperties@6006f3e0, class org.jboss.on.embedded.bean.MeasurementDisplay=javax.el.BeanELResolver$BeanProperties@68752860} {noformat}