UploadedFile is null when sending a request to send jsf using Tomahawk

Question

trying to upload a file on the facelets page using Tomahawk2.0 1.1.11. But I get a null pointer exception, and I see in the debugger, the uploadedFile variable is not set to the bean. Any ideas why the bean is not set? The t: inputFileUpload component will otherwise display and function as I expected.

page:

<h:form enctype="multipart/form-data"> <t:inputFileUpload value="#{Bean.uploadedFile}" /> <h:commandButton type="submit" id="Submit" value="Submit" action="#{Bean.submit}"/> <h:messages /> </h:form> 

bean:

 protected UploadedFile uploadedFile; public UploadedFile getUploadedFile() { return this.uploadedFile; } public void setUploadedFile(UploadedFile uploadedFile) { this.uploadedFile = uploadedFile;} public String submit() throws IOException { String fileName = FilenameUtils.getName(uploadedFile.getName()); // exception here!! String contentType = uploadedFile.getContentType(); byte[] bytes = uploadedFile.getBytes(); FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(String.format("File '%s' of type '%s' successfully uploaded!", fileName, contentType))); return "success"; } 

An exception occurs on the first line of submit. In the debugger, I see that uploadedFile is null. The jsf page looks great, and I can use the browse button to select a file. After I click submit, I see that the uploadedFile in the bean is null.

Error message:

 16:06:59,699 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/Framework].[Faces Servlet]] (http--127.0.0.1-8080-2) Servlet.service() for servlet Faces Servlet threw exception: java.lang.NullPointerException at net.gui.bean.Bean.submit(Bean.java:118) [classes:] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_30] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [:1.6.0_30] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [:1.6.0_30] at java.lang.reflect.Method.invoke(Method.java:597) [:1.6.0_30] at org.apache.el.parser.AstValue.invoke(AstValue.java:196) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT] at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1] at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT] at javax.faces.component.UICommand.broadcast(UICommand.java:315) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1] at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1] at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1] at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT] at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT] at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) [jsf-impl-2.1.3-b02-jbossorg-2.jar:2.1.3-SNAPSHOT] at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) [jboss-jsf-api_2.1_spec-2.0.0.Beta1.jar:2.0.0.Beta1] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:357) [tomahawk20-1.1.11.jar:] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at net.gui.filter.HibernateSessionRequestFilter.doFilter(HibernateSessionRequestFilter.java:34) [classes:] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at net.gui.filter.NAISAuthFilter.doFilter(NAISAuthFilter.java:59) [classes:] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:139) [jboss-as-web-7.0.2.Final.jar:7.0.2.Final] at org.jboss.as.web.NamingValve.invoke(NamingValve.java:57) [jboss-as-web-7.0.2.Final.jar:7.0.2.Final] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:154) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:667) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:952) [jbossweb-7.0.1.Final.jar:7.0.2.Final] at java.lang.Thread.run(Thread.java:662) [:1.6.0_30] 

web.xml:

 <filter> <filter-name>MyFacesExtensionsFilter</filter-name> <filter-class>org.apache.myfaces.webapp.filter.ExtensionsFilter</filter-class> </filter> <filter-mapping> <filter-name>MyFacesExtensionsFilter</filter-name> <servlet-name>Faces Servlet</servlet-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> <filter-name>NaisAuth</filter-name> <filter-class>net.gui.filter.NAISAuthFilter</filter-class> </filter> <filter-mapping> <filter-name>NaisAuth</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> <filter-name>HibernateFilter</filter-name> <filter-class> net.gui.filter.HibernateSessionRequestFilter</filter-class> </filter> <filter-mapping> <filter-name>HibernateFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> 

Answer 1

This can happen when either NAISAuthFilter or HibernateSessionRequestFilter previously requested the request body getParameter() , getReader() , etc. Thus, the request body is already parsed before the ExtensionsFilter ever has the opportunity to make it.

Either fix these filters, or change the display order of ExtensionsFilter in web.xml , which must be declared before these filters.

Another possible reason is that you are actually inserting multiple <h:form> compnents into each other. This will result in illegal HTML syntax, and browser behavior will not be specified with respect to form processing. You need to make sure that you are not nested forms (several parallel parallel forms, however, are absolutely correct).