getNavigationCase-idempotent-tester (reproducer for Mojarra #4279)

Steps to reproduce:

1. Clone the getNavigationCase-idempotent-tester project:

   git clone https://github.com/stiemannkj1/getNavigationCase-idempotent-tester.git
   

2. Build the project:

   cd getNavigationCase-idempotent-tester && mvn clean package
   

3. Deploy the project to Tomcat:

   cp target/*.war $TOMCAT_HOME/webapps/getNavigationCase-idempotent-tester.war
   

4. Navigate to the deployed webapp at http://localhost:8080/getNavigationCase-idempotent-tester/.

5. Click the flow1 button to navigate to flow1.

6. Click the callFlow2 button to navigate to flow2 as a nested flow (inside flow1).

7. Click the Call NavigationHandler.getNavigationCase(facesContext, "returnFromFlow2", "returnFromFlow2") then returnFromFlow2 to execute the action #{flow2Bean.returnFromFlow2} which calls NavigationHandler.getNavigationCase(facesContext, "returnFromFlow2", "returnFromFlow2") and returns returnFromFlow2 in order to exit flow2.

If the bug still exists, the browser will fail to navigate to returnFromFlow2.xhtml and the following messages will appear in the logs indicating that flow1 was exited prematurely:

Flow2Bean @PreDestroy Called.
Flow1Bean @PreDestroy Called.

The following stacktrace will also appear in the logs:

13-Sep-2017 17:37:55.305 SEVERE [http-nio-8181-exec-62] com.sun.faces.application.view.FaceletViewHandlingStrategy.handleRenderException Error Rendering View[/flow1/returnFromFlow2.xhtml]
 javax.el.ELException: /flow1/returnFromFlow2.xhtml: WELD-001303: No active contexts for scope type javax.faces.flow.FlowScoped
        at com.sun.faces.facelets.compiler.TextInstruction.write(TextInstruction.java:90)
        at com.sun.faces.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:82)
        at com.sun.faces.facelets.compiler.UILeaf.encodeAll(UILeaf.java:183)
        at javax.faces.render.Renderer.encodeChildren(Renderer.java:176)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:890)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
        at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:458)
        at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:134)
        at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:659)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.jboss.weld.context.ContextNotActiveException: WELD-001303: No active contexts for scope type javax.faces.flow.FlowScoped
        at org.jboss.weld.manager.BeanManagerImpl.getContext(BeanManagerImpl.java:689)
        at org.jboss.weld.bean.ContextualInstanceStrategy$DefaultContextualInstanceStrategy.get(ContextualInstanceStrategy.java:95)
        at org.jboss.weld.bean.ContextualInstance.get(ContextualInstance.java:50)
        at org.jboss.weld.manager.BeanManagerImpl.getReference(BeanManagerImpl.java:742)
        at org.jboss.weld.el.AbstractWeldELResolver.lookup(AbstractWeldELResolver.java:107)
        at org.jboss.weld.el.AbstractWeldELResolver.getValue(AbstractWeldELResolver.java:90)
        at org.jboss.weld.environment.servlet.util.ForwardingELResolver.getValue(ForwardingELResolver.java:49)
        at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:66)
        at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
        at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
        at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:80)
        at org.apache.el.parser.AstValue.getValue(AstValue.java:137)
        at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
        at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50)
        at com.sun.faces.facelets.el.ELText$ELTextVariable.writeText(ELText.java:238)
        at com.sun.faces.facelets.compiler.TextInstruction.write(TextInstruction.java:85)
        ... 35 more

If the bug is fixed, the browser will navigate to returnFromFlow2.xhtml and the following message will appear in the logs indicating that only flow2 was exited:

Flow2Bean @PreDestroy Called.

To see the correct behavior, simply repeat steps 4-6 and click the returnFromFlow2 button. MyFaces also handles the navigation correctly. You can include MyFaces in place of Mojarra by performing step 2 and including the myfaces profile: mvn clean package -P myfaces.