[jbossseam-issues] [JBoss JIRA] Closed: (JBSEAM-948) NPE in Facelets debug page rendering when re-rendering Seam fileUpload component

NPE in Facelets debug page rendering when re-rendering Seam fileUpload component -------------------------------------------------------------------------------- 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 Priority: Minor Fix For: 1.2.1.GA 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.