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POJSF 2 + PrettyFaces -> IllegalStateException: PWC3990: getWriter() has already been called for this response
 

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  1. POJSF 2 + PrettyFaces -> IllegalStateException: PWC3990: getWriter() has already been called for this response
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    <p>I have a Java EE App that has JSF2 + PrettyFaces + Facelets + EJB3 + EclipseLink.</p> <p>I'm continually running into an IllegalStateException as stated above, due to some inconsistencies in the JSF2 + Faceletes rendering model to work along with PrettyFaces and h:link tag.</p> <p>I removed all my old JSTL tags and also all the commandLink tags, according to good practices when using JSF2 + Faceletes. </p> <p>In web.xml:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;web-app version="3.0" 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-app_3_0.xsd"&gt; &lt;display-name&gt;atlPortal&lt;/display-name&gt; &lt;context-param&gt; &lt;param-name&gt;com.sun.faces.prefer.XHTML&lt;/param-name&gt; &lt;param-value&gt;true&lt;/param-value&gt; &lt;/context-param&gt; &lt;context-param&gt; &lt;param-name&gt;javax.faces.PROJECT_STAGE&lt;/param-name&gt; &lt;param-value&gt;Development&lt;/param-value&gt; &lt;/context-param&gt; &lt;context-param&gt; &lt;param-name&gt;javax.faces.FACELETS_LIBRARIES&lt;/param-name&gt; &lt;param-value&gt;/WEB-INF/facelets/customTags.taglib.xml&lt;/param-value&gt; &lt;/context-param&gt; &lt;servlet&gt; &lt;servlet-name&gt;Faces Servlet&lt;/servlet-name&gt; &lt;servlet-class&gt;javax.faces.webapp.FacesServlet&lt;/servlet-class&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;Faces Servlet&lt;/servlet-name&gt; &lt;url-pattern&gt;*.faces&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;servlet&gt; &lt;servlet-name&gt;imageServlet&lt;/servlet-name&gt; &lt;servlet-class&gt;com.mindvortex.atl.web.common.servlet.ImageServlet&lt;/servlet-class&gt; &lt;load-on-startup&gt;2&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;imageServlet&lt;/servlet-name&gt; &lt;url-pattern&gt;/image/*&lt;/url-pattern&gt; &lt;url-pattern&gt;/pages/image/*&lt;/url-pattern&gt; &lt;url-pattern&gt;/pages/protected/image/*&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;filter&gt; &lt;filter-name&gt;Pretty Filter&lt;/filter-name&gt; &lt;filter-class&gt;com.ocpsoft.pretty.PrettyFilter&lt;/filter-class&gt; &lt;async-supported&gt;false&lt;/async-supported&gt; &lt;/filter&gt; &lt;filter-mapping&gt; &lt;filter-name&gt;Pretty Filter&lt;/filter-name&gt; &lt;url-pattern&gt;/*&lt;/url-pattern&gt; &lt;dispatcher&gt;FORWARD&lt;/dispatcher&gt; &lt;dispatcher&gt;REQUEST&lt;/dispatcher&gt; &lt;dispatcher&gt;ERROR&lt;/dispatcher&gt; &lt;/filter-mapping&gt; &lt;listener&gt; &lt;listener-class&gt;com.sun.faces.config.ConfigureListener&lt;/listener-class&gt; &lt;/listener&gt; &lt;!-- servlets and such would be above --&gt; &lt;login-config&gt; &lt;auth-method&gt;FORM&lt;/auth-method&gt; &lt;realm-name&gt;userauth&lt;/realm-name&gt; &lt;form-login-config&gt; &lt;form-login-page&gt;/login.faces&lt;/form-login-page&gt; &lt;form-error-page&gt;/loginError.xhtml&lt;/form-error-page&gt; &lt;/form-login-config&gt; &lt;/login-config&gt; &lt;security-constraint&gt; &lt;display-name&gt;Block All XHTML&lt;/display-name&gt; &lt;web-resource-collection&gt; &lt;web-resource-name&gt;blockXHTML&lt;/web-resource-name&gt; &lt;description&gt;&lt;/description&gt; &lt;url-pattern&gt;*.xhtml&lt;/url-pattern&gt; &lt;http-method&gt;GET&lt;/http-method&gt; &lt;http-method&gt;POST&lt;/http-method&gt; &lt;http-method&gt;HEAD&lt;/http-method&gt; &lt;http-method&gt;PUT&lt;/http-method&gt; &lt;http-method&gt;OPTIONS&lt;/http-method&gt; &lt;http-method&gt;TRACE&lt;/http-method&gt; &lt;http-method&gt;DELETE&lt;/http-method&gt; &lt;/web-resource-collection&gt; &lt;auth-constraint /&gt; &lt;/security-constraint&gt; &lt;security-constraint&gt; &lt;display-name&gt;ConstraintSSL&lt;/display-name&gt; &lt;web-resource-collection&gt; &lt;web-resource-name&gt;protected&lt;/web-resource-name&gt; &lt;description/&gt; &lt;url-pattern&gt;/pages/protected/*&lt;/url-pattern&gt; &lt;url-pattern&gt;/login/*&lt;/url-pattern&gt; &lt;url-pattern&gt;/login.*&lt;/url-pattern&gt; &lt;url-pattern&gt;/account/*&lt;/url-pattern&gt; &lt;http-method&gt;GET&lt;/http-method&gt; &lt;http-method&gt;POST&lt;/http-method&gt; &lt;http-method&gt;HEAD&lt;/http-method&gt; &lt;http-method&gt;PUT&lt;/http-method&gt; &lt;http-method&gt;OPTIONS&lt;/http-method&gt; &lt;http-method&gt;TRACE&lt;/http-method&gt; &lt;http-method&gt;DELETE&lt;/http-method&gt; &lt;/web-resource-collection&gt; &lt;user-data-constraint&gt; &lt;description&gt;SSL not required for Development&lt;/description&gt; &lt;transport-guarantee&gt;CONFIDENTIAL&lt;/transport-guarantee&gt; &lt;/user-data-constraint&gt; &lt;/security-constraint&gt; &lt;security-constraint&gt; &lt;display-name&gt;ConstraintUser&lt;/display-name&gt; &lt;web-resource-collection&gt; &lt;web-resource-name&gt;user&lt;/web-resource-name&gt; &lt;description/&gt; &lt;url-pattern&gt;/account/*&lt;/url-pattern&gt; &lt;http-method&gt;GET&lt;/http-method&gt; &lt;http-method&gt;POST&lt;/http-method&gt; &lt;http-method&gt;HEAD&lt;/http-method&gt; &lt;http-method&gt;PUT&lt;/http-method&gt; &lt;http-method&gt;OPTIONS&lt;/http-method&gt; &lt;http-method&gt;TRACE&lt;/http-method&gt; &lt;http-method&gt;DELETE&lt;/http-method&gt; &lt;/web-resource-collection&gt; &lt;auth-constraint&gt; &lt;description/&gt; &lt;role-name&gt;ADMINISTRATORS&lt;/role-name&gt; &lt;role-name&gt;USERS&lt;/role-name&gt; &lt;/auth-constraint&gt; &lt;user-data-constraint&gt; &lt;description&gt;SSL not required for Development&lt;/description&gt; &lt;transport-guarantee&gt;CONFIDENTIAL&lt;/transport-guarantee&gt; &lt;/user-data-constraint&gt; &lt;/security-constraint&gt; &lt;security-role&gt; &lt;description/&gt; &lt;role-name&gt;USERS&lt;/role-name&gt; &lt;/security-role&gt; &lt;security-role&gt; &lt;description/&gt; &lt;role-name&gt;ADMINISTRATORS&lt;/role-name&gt; &lt;/security-role&gt; &lt;session-config&gt; &lt;session-timeout&gt;30&lt;/session-timeout&gt; &lt;tracking-mode&gt;COOKIE&lt;/tracking-mode&gt; &lt;/session-config&gt; &lt;welcome-file-list&gt; &lt;welcome-file&gt;init.faces&lt;/welcome-file&gt; &lt;/welcome-file-list&gt; &lt;/web-app&gt; </code></pre> <p>This happens whenever I navigate from one XHTML page to another via <pre><code> &lt;h:link outcome="pretty:viewContactUs" styleClass="nav6"&gt; #{msg['contactUs']} &lt;/h:link&gt; </code></pre> <p>in pretty-faces.xml</p> <pre><code> &lt;url-mapping id="viewContactUs"&gt; &lt;pattern value="/contactUs/" /&gt; &lt;view-id value="contactUs.faces" /&gt; &lt;action&gt;#{commentsMB.openContactUs}&lt;/action&gt; &lt;/url-mapping&gt; </code></pre> <p>in CommentsMB Managed Bean:</p> <pre><code>@ManagedBean @RequestScoped public class CommentsMB extends UserCrudMB&lt;Comments, Integer&gt; { private static final long serialVersionUID = 1L; @EJB(mappedName="ejb/CommentsService") private CommentsServiceBeanLocal commentsService; // ... Code public String openContactUs() { this.entity = new Comments(); return NavigationViews.VIEW_CONTACT_US; } } </code></pre> <p>in faces-config.xml:</p> <pre><code> &lt;navigation-rule&gt; &lt;from-view-id&gt;/*&lt;/from-view-id&gt; &lt;navigation-case&gt; &lt;from-outcome&gt;contactUs&lt;/from-outcome&gt; &lt;to-view-id&gt;/pages/contactUs.xhtml&lt;/to-view-id&gt; &lt;redirect /&gt;&lt;/navigation-case&gt; </code></pre> <p>in contactUs.xhtml:</p> <pre><code> &lt;div class="form_row"&gt; &lt;h:link id="commentsSave" outcome="pretty:commentsSave" styleClass="contact"&gt; #{msg.send} &lt;/h:link&gt; &lt;/div&gt; </code></pre> <p>The error happens just when I click the commentsSave Button. It gives: IllegalStateException: PWC3990: getWriter() has already been called for this response.</p> <p>the pretty-config.xml for commentsSave URL mapping:</p> <pre><code> &lt;url-mapping id="commentsSave"&gt; &lt;pattern value="/comments/save/" /&gt; &lt;view-id value="contactUs.faces" /&gt; &lt;action&gt;#{commentsMB.save}&lt;/action&gt; &lt;/url-mapping&gt; </code></pre> <p>CommentsMB save action signature:</p> <pre><code>public String save() { return save(this.getEntity()); } </code></pre> <p>The commentsMB.save Bean action is not called and I get a page not found error with the exception thrown in the logs.</p> <p>StackTrace:</p> <pre><code>[#|2012-03-30T13:47:54.968-0300|SEVERE|glassfish3.1.1|org.apache.jasper.servlet.JspServlet|_ThreadID=25;_ThreadName=http-thread-pool-8084(4);|PWC6117: File "C%3A%5CGBL%5Cprop%5Cprogs%5Cglassfish-3.1.1%5Cglassfish3%5Cglassfish%5Cdomains%5Cdomain1%5Capplications%5CatlanteusEAR%5CatlanteusPortal-1.0.0_ war%5Ccomments%5Csave%5CcontactUs.jsp" not found|#] [#|2012-03-30T13:47:54.976-0300|WARNING|glassfish3.1.1|org.apache.catalina.core.ApplicationDispatcherForward|_ThreadID=25;_ThreadName=http-thread-pool -8084(4);|Exception processing ErrorPage[errorCode=404, location=/pages/error/error404.xhtml] java.lang.IllegalStateException: PWC1227: Cannot forward after response has been committed at org.apache.catalina.core.ApplicationDispatcher.doDispatch(ApplicationDispatcher.java:370) at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:350) at org.apache.catalina.core.ApplicationDispatcherForward.custom(ApplicationDispatcherForward.java:253) at org.apache.catalina.core.ApplicationDispatcherForward.status(ApplicationDispatcherForward.java:209) at org.apache.catalina.core.ApplicationDispatcherForward.commit(ApplicationDispatcherForward.java:131) at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:353) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:300) at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:110) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98) at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) at com.sun.grizzly.ContextTask.run(ContextTask.java:71) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) at java.lang.Thread.run(Thread.java:619) |#] </code></pre> <p>Seems that JSF is interpreting the navigation as a .jsp altough I use XHTML only.</p> <p>Could someone help me figure out what am I doing wrong ? This is my major issue since I began using JSF2 + Facelets.</p>
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    1. COEdit your question to include the stacktrace, please. This way we can find out who is trying to write to the response writer while it should apparently not do that.
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    2. CO@BalusC Did as you proposed, thanks!
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    3. COOkay, it's `PrettyFilter` of PrettyFaces who isn't checking if the response is committed. Well, at least your own code is excluded from being the cause. I'll leave this question for ones who are more familiar with PrettyFaces. It'll be either a bug in PrettyFaces itself or a misconiguration of `pretty-config.xml`.
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