12-May-2019 11:21:42.162 WARNING [http-nio-20019-exec-166] com.sun.faces.lifecycle.ProcessValidationsPhase.execute javax.faces.el.EvaluationException: java.lang.NullPointerException
 java.lang.IllegalStateException: javax.faces.el.EvaluationException: java.lang.NullPointerException
	at javax.faces.component.MethodBindingValueChangeListener.processValueChange(MethodBindingValueChangeListener.java:108)
	at javax.faces.event.ValueChangeEvent.processListener(ValueChangeEvent.java:155)
	at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:839)
	at javax.faces.component.UIData.broadcast(UIData.java:1158)
	at javax.faces.component.UIData.broadcast(UIData.java:1158)
	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:835)
	at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1334)
	at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:77)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:201)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:670)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:475)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:679)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:836)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1747)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
	at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
	at javax.faces.component.MethodBindingValueChangeListener.processValueChange(MethodBindingValueChangeListener.java:97)
	... 35 more
Caused by: java.lang.NullPointerException
	at org.sakaiproject.tool.assessment.ui.bean.delivery.DeliveryBean.addMediaToItemGrading(DeliveryBean.java:2585)
	at org.sakaiproject.tool.assessment.ui.bean.delivery.DeliveryBean.addMediaToItemGrading(DeliveryBean.java:2528)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.el.parser.AstValue.invoke(AstValue.java:247)
	at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
	at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
	... 36 more

12-May-2019 11:21:42.162 ERROR [http-nio-20019-exec-166] org.sakaiproject.util.RequestFilter.doFilter javax.faces.el.EvaluationException: java.lang.NullPointerException
javax.servlet.ServletException: javax.faces.el.EvaluationException: java.lang.NullPointerException
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:683)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:475)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:679)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:836)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1747)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalStateException: javax.faces.el.EvaluationException: java.lang.NullPointerException
	at javax.faces.component.MethodBindingValueChangeListener.processValueChange(MethodBindingValueChangeListener.java:108)
	at javax.faces.event.ValueChangeEvent.processListener(ValueChangeEvent.java:155)
	at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:839)
	at javax.faces.component.UIData.broadcast(UIData.java:1158)
	at javax.faces.component.UIData.broadcast(UIData.java:1158)
	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:835)
	at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1334)
	at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:77)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:201)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:670)
	... 25 more
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
	at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
	at javax.faces.component.MethodBindingValueChangeListener.processValueChange(MethodBindingValueChangeListener.java:97)
	... 35 more
Caused by: java.lang.NullPointerException
	at org.sakaiproject.tool.assessment.ui.bean.delivery.DeliveryBean.addMediaToItemGrading(DeliveryBean.java:2585)
	at org.sakaiproject.tool.assessment.ui.bean.delivery.DeliveryBean.addMediaToItemGrading(DeliveryBean.java:2528)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.el.parser.AstValue.invoke(AstValue.java:247)
	at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267)
	at com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
	... 36 more