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Java.lang.NullPointerException in com.sun.faces.context.flash.ELFlash.loggingGetPhaseMapForReading

I am running my application in apache-tomcat-7.0.16 using JSF-2.1.2. After adding navigation rules in faces-config.xml, I get a NullPointerException. This error was posted on the JSF forum. Is there a compatible version between JSF and tomcat application server or any solution for this? The error stack trace is shown below:

java.lang.NullPointerException at com.sun.faces.context.flash.ELFlash.loggingGetPhaseMapForReading(ELFlash.java:793) at com.sun.faces.context.flash.ELFlash.getPhaseMapForReading(ELFlash.java:826) at com.sun.faces.context.flash.ELFlash.isEmpty(ELFlash.java:484) at com.sun.faces.facelets.util.DevTools.writeVariables(DevTools.java:325) at com.sun.faces.facelets.util.DevTools.writeVariables(DevTools.java:215) at com.sun.faces.facelets.util.DevTools.debugHtml(DevTools.java:130) at com.sun.faces.renderkit.RenderKitUtils.renderHtmlErrorPage(RenderKitUtils.java:1159) at com.sun.faces.context.ExceptionHandlerImpl.throwIt(ExceptionHandlerImpl.java:269) at com.sun.faces.context.ExceptionHandlerImpl.handle(ExceptionHandlerImpl.java:141) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:119) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302) at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:546) at com.sun.faces.application.view.JspViewHandlingStrategy.executePageToBuildView(JspViewHandlingStrategy.java:364) at com.sun.faces.application.view.JspViewHandlingStrategy.buildView(JspViewHandlingStrategy.java:154) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:100) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:662)
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3 answers

Same issue with Tomcat 7.0.26 and JSF 2.1.7. Works with JSF 2.0.9

Initially just configured

  <dependency> <groupId>com.sun.faces</groupId> <artifactId>jsf-api</artifactId> <version>2.1.7</version> </dependency> <dependency> <groupId>com.sun.faces</groupId> <artifactId>jsf-impl</artifactId> <version>2.1.7</version> </dependency>

But got java.lang.NoClassDefFoundError: javax / servlet / jsp / jstl / core / Config

Only after trying to add a jstl dependency did I get a NullPointerException. After returning to JSF 2.0.9, I also removed the jstl dependency.

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I recently had a similar problem with the same error stack trace. The <welcome-file-list> entry was like this when I received this error:

 <welcome-file-list> <welcome-file>index.xhtml</welcome-file> </welcome-file-list>

However, the error disappeared when I changed the entry to (leading persons indicate):

 <welcome-file-list> <welcome-file>faces/index.xhtml</welcome-file> </welcome-file-list>
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I faced the same problem. I was able to solve this by changing faces-config.xml as shown below

 <faces-config xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd" version="2.0"> </faces-config>
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