ModuleGroupSingletonProvider throws NullPoinerException instead of clear exception message because of Hashtable usage --------------------------------------------------------------------------------------------------------------------- Key: AS7-3225 URL: https://issues.jboss.org/browse/AS7-3225 Project: Application Server 7 Issue Type: Bug Components: CDI / Weld Reporter: Geoffrey De Smet Assignee: Stuart Douglas Priority: Minor Here's a stacktrace we get: {code} 14:45:47,087 INFO [stdout] (http--127.0.0.1-8080-2) java.lang.NullPointerException 14:45:47,087 INFO [stdout] (http--127.0.0.1-8080-2) at java.util.Hashtable.get(Hashtable.java:334) 14:45:47,087 INFO [stdout] (http--127.0.0.1-8080-2) at org.jboss.as.weld.services.ModuleGroupSingletonProvider$TCCLSingleton.get(ModuleGroupSingletonProvider.java:71) 14:45:47,088 INFO [stdout] (http--127.0.0.1-8080-2) at org.jboss.weld.Container.instance(Container.java:58) 14:45:47,088 INFO [stdout] (http--127.0.0.1-8080-2) at org.jboss.weld.bean.proxy.ContextBeanInstance.getInstance(ContextBeanInstance.java:72) 14:45:47,088 INFO [stdout] (http--127.0.0.1-8080-2) at org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:124) 14:45:47,088 INFO [stdout] (http--127.0.0.1-8080-2) at org.drools.guvnor.server.RepositoryAssetOperations$Proxy$_$$_WeldClientProxy.findAssetPage(RepositoryAssetOperations$Proxy$_$$_WeldClientProxy.java) {code} The code uses a java.util.Hashtable, which isn't null-safe (while a HashMap is) Replacing this code in ModuleGroupSingletonProvider.java: {code} private final Map<ClassLoader, T> store = new Hashtable<ClassLoader, T>(); {code} by this, will probably fix it {code} private final Map<ClassLoader, T> store = Collections.synchronizedMap(new HashMap<ClassLoader, T>()); {code} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.jboss.org/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira