[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-948) NPE in Facelets if no redirect after file upload

[Christian Bauer (JIRA)]

NPE in Facelets if no redirect after file upload
------------------------------------------------

                 Key: JBSEAM-948
                 URL: http://jira.jboss.com/jira/browse/JBSEAM-948
             Project: JBoss Seam
          Issue Type: Bug
          Components: JSF
            Reporter: Christian Bauer
         Assigned To: Shane Bryzak


This happens after a file upload action, if we don't redirect but render a page (the seamspace demo is redirecting). It does not matter which page is rendered after the file upload.


fileEdit.xhtml:

    <h:form enctype="multipart/form-data">
                <s:validateAll>

                    <s:decorate>
                        <div class="entry">
                            <div class="label">Name:</div>
                            <div class="input">
                                <h:inputText tabindex="1" size="80" maxlength="255" id="name" required="true"
                                             value="#{fileHome.instance.name}"/>
                            </div>
                        </div>
                    </s:decorate>

                    <s:decorate>
                        <div class="entry">
                            <div class="label">Upload:</div>
                            <div class="input">
                                <s:fileUpload data="#{fileHome.instance.data}"
                                              contentType="#{fileHome.instance.contentType}"
                                              fileName="#{fileHome.instance.filename}"
                                              fileSize="#{fileHome.instance.filesize}"/>
                            </div>
                        </div>
                    </s:decorate>

...

FileHome is just a Home<File> subclass, nothing interesting. When I submit this form, the upload is done and the home.persist() method completes OK (I have everything in the database). The render response, which is fileEdit.xhtml again, fails with this:

java.lang.NullPointerException
        at com.sun.facelets.util.DevTools.writeVariables(DevTools.java:168)
        at com.sun.facelets.util.DevTools.writeVariables(DevTools.java:144)
        at com.sun.facelets.util.DevTools.debugHtml(DevTools.java:109)
        at com.sun.facelets.FaceletViewHandler.handleRenderException(FaceletViewHandler.java:671)
        at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:639)
        at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:130)
        at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:107)
        at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:78)
        at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:383)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63)
        at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
        at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
        at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
        at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
        at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:74)
        at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
        at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
        at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
        at java.lang.Thread.run(Thread.java:613)

Looks like there is a problem rendering the view and then an NPE in Facelets which hides the error.

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