java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at org.apache.catalina.connector.Request.notifyAttributeAssigned(Request.java:1565)
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.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.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:679)

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