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java.lang.NullPointerException: 	at org.apache.catalina.connector.Request.notifyAttributeAssigned(Request.java:1565)	at org.apache.catalina.connector.Request.setAttribute(Request.java:1556)	at org.jboss.weld.context.http.HttpConversationContextImpl.setRequestAttribute(HttpConversationContextImpl.java:42)	at org.jboss.weld.context.http.HttpConversationContextImpl.setRequestAttribute(HttpConversationContextImpl.java:13)	at org.jboss.weld.context.AbstractConversationContext.associateRequestWithNewConversation(AbstractConversationContext.java:196)	at org.jboss.weld.context.AbstractConversationContext.initialize(AbstractConversationContext.java:252)	at org.jboss.weld.context.http.LazyHttpConversationContextImpl.initialize(LazyHttpConversationContextImpl.java:67)	at org.jboss.weld.context.AbstractConversationContext.activate(AbstractConversationContext.java:226)	at org.jboss.weld.servlet.ConversationContextActivator.activate(ConversationContextActivator.java:110)	at org.jboss.weld.servlet.ConversationContextActivator.activateConversationContext(ConversationContextActivator.java:93)	at org.jboss.weld.servlet.HttpContextLifecycle.requestInitialized(HttpContextLifecycle.java:183)	at org.jboss.weld.servlet.WeldInitialListener.requestInitialized(WeldInitialListener.java:153)	at org.jboss.weld.servlet.api.helpers.ForwardingServletListener.requestInitialized(ForwardingServletListener.java:42)	at org.apache.catalina.core.StandardContext.fireRequestInitEvent(StandardContext.java:6103)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:167)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)	at java.lang.Thread.run(Thread.java:679)