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POFacesContext.getCurrentInstance() returns null within request handled by FacesServlet(?)
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  1. POFacesContext.getCurrentInstance() returns null within request handled by FacesServlet(?)
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    copied!<p>I have a Facelet that has two <code>&lt;h:forms&gt;</code>. The command link in one form executes without a problem. The command link in the other form does not work: a <code>NullPointerException</code> is thrown because <code>FacesContext.getCurrentInstance()</code> is returning <code>null</code>. It appears to me that the request goes through <code>FacesServlet</code> so it doesn't make sense that <code>FacesContext.getCurrentInstance()</code> would return <code>null</code>.</p> <p>Here's the XHTML:</p> <pre><code>&lt;h:form&gt; &lt;h:commandLink action="#{localeManager.setLanguage('en')}"&gt;English&lt;/h:commandLink&gt; &lt;/h:form&gt; </code></pre> <p>The resulting HTML is here:</p> <pre><code>&lt;form id="j_idt20" name="j_idt20" method="post" action="/Patrac/faces/academicyear.xhtml" enctype="application/x-www-form-urlencoded"&gt; &lt;input type="hidden" name="j_idt20" value="j_idt20" /&gt; &lt;script type="text/javascript" src="/Patrac/faces/javax.faces.resource/jsf.js?ln=javax.faces&amp;amp;stage=Development"&gt;&lt;/script&gt; &lt;a href="#" onclick="mojarra.jsfcljs(document.getElementById('j_idt20'),{'j_idt20:j_idt22':'j_idt20:j_idt22'},'');return false"&gt;English&lt;/a&gt; &lt;input type="hidden" name="javax.faces.ViewState" id="javax.faces.ViewState" value="-3103232499387158697:-8681635922139458233" autocomplete="off" /&gt; &lt;/form&gt; </code></pre> <p>Here is the LocaleManager:</p> <pre><code>@Named @SessionScoped public class LocaleManager implements Serializable { ... public void setLanguage(String language) { this.locale = new Locale(language); FacesContext fc = FacesContext.getCurrentInstance(); UIViewRoot uivr = fc.getViewRoot(); &lt;===== NullPointerException uivr.setLocale(locale); } } </code></pre> <p>And here's the stack trace:</p> <pre><code>16:35:31,697 WARNING [javax.enterprise.resource.webcontainer.jsf.lifecycle] (http--127.0.0.1-8443-4) #{localeManager.setLanguage('en')}: java.lang.NullPointerException: javax.faces.FacesException: #{localeManager.setLanguage('en')}: java.lang.NullPointerException at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-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-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT] at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT] at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-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-7.0.7.Final.jar:] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.7.Final.jar:] at org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62) [weld-core-1.1.4.Final.jar:2011-11-22 20:01] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.7.Final.jar:] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.7.Final.jar:] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.7.Final.jar:] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.7.Final.jar:] at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.1.0.CR1b.jar:7.1.0.CR1b] at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:151) [jboss-as-web-7.1.0.CR1b.jar:7.1.0.CR1b] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.7.Final.jar:] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.7.Final.jar:] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.7.Final.jar:] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362) [jbossweb-7.0.7.Final.jar:] at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:897) [jbossweb-7.0.7.Final.jar:] at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:626) [jbossweb-7.0.7.Final.jar:] at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2033) [jbossweb-7.0.7.Final.jar:] at java.lang.Thread.run(Thread.java:722) [:1.7.0_02] Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) [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-2.1.5-jbossorg-1.jar:2.1.5-SNAPSHOT] ... 24 more Caused by: java.lang.NullPointerException at com.patrac.controller.LocaleManager.setLanguage(LocaleManager.java:38) [Patrac-ejb-1.0-SNAPSHOT.jar:] at com.patrac.controller.LocaleManager$Proxy$_$$_WeldClientProxy.setLanguage(LocaleManager$Proxy$_$$_WeldClientProxy.java) [Patrac-ejb-1.0-SNAPSHOT.jar:] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.7.0_02] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [:1.7.0_02] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [:1.7.0_02] at java.lang.reflect.Method.invoke(Method.java:601) [:1.7.0_02] at org.apache.el.parser.AstValue.invoke(AstValue.java:262) [jbossweb-7.0.7.Final.jar:] at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278) [jbossweb-7.0.7.Final.jar:] at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39) [weld-core-1.1.4.Final.jar:2011-11-22 20:01] at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) [weld-core-1.1.4.Final.jar:2011-11-22 20:01] at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) [jsf-impl-2.1.5-jbossorg-1.jar:2.1.5-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] ... 25 more </code></pre> <p>Taking a look at <a href="https://stackoverflow.com/a/4786248/984932">this answer to a similar question</a> my first thought was that the request was not going through FacesServlet. But looking at <code>form action</code> field in the generated HTML and the stack trace, above, it looks to me like the request is going through FacesServlet.</p> <p>Any ideas on this? What am I not getting?</p>
 

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