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POjava.lang.NullPointerException at javax.faces.webapp.UIComponentClassicTagBase.setJspId
 

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  1. POjava.lang.NullPointerException at javax.faces.webapp.UIComponentClassicTagBase.setJspId
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    <p>using jsf causes a NullpointerException:</p> <pre><code> WARNING: StandardWrapperValve[jsp]: PWC1406: Servlet.service() for servlet jsp threw exception java.lang.NullPointerException at javax.faces.webapp.UIComponentClassicTagBase.setJspId(UIComponentClassicTagBase.java:1858) at org.apache.jsp.jsf.list_jsp._jspx_meth_h_form_0(list_jsp.java:112) at org.apache.jsp.jsf.list_jsp._jspService(list_jsp.java:86) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111) at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377) at javax.servlet.http.HttpServlet.service(HttpServlet.java:770) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) 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 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) at com.sun.grizzly.ContextTask.run(ContextTask.java:71) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) at java.lang.Thread.run(Thread.java:722) </code></pre> <p>In my lib folder of my glassfish-server and of my dynamic web-project are the following jars:</p> <ul> <li>standard-1.1.2.jar</li> <li>jstl-jstl-1.2.jar</li> <li>jsp-api-2.1</li> <li>jsf-impl-2.1.7.jar</li> <li>jsf-api-2.2.0-m03.jar</li> </ul> <p>My Bean:</p> <pre><code>@Stateless @Named public class StatelessBean { public int getNumberOfMovies() { return 42; } public int getNumberOfPersons() { return 42; } } </code></pre> <p>My jsf:</p> <pre><code> &lt;%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%&gt; &lt;%@ taglib prefix="f" uri="http://java.sun.com/jsf/core"%&gt; &lt;%@ taglib prefix="h" uri="http://java.sun.com/jsf/html"%&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt; &lt;html&gt; &lt;head&gt; &lt;link href="../css/basic.css" type="text/css" rel="stylesheet"&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"&gt; &lt;title&gt;Liste&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;h:form&gt; &lt;h1&gt;Stateless&lt;/h1&gt; &lt;h:outputText value="Anzahl der Filme: #{StatelessBean.getNumberOfMovies()}" /&gt; &lt;h:outputText value="Anzahl der Personen: #{StatelessBean.getNumberOfPersons()}" /&gt; &lt;/h:form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>The awnsers provided here: <a href="https://stackoverflow.com/questions/2322031/why-did-servlet-service-for-servlet-jsp-throw-this-exception">stackoverflow</a> didnt help.</p> <p>Dont know how to resolv this.</p>
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    1. COI've never seen bean names starting by a caps inside a view... Also you should use `xmlns` instead of `taglib`.
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    2. COthe bean starting with a caps was a try... without caps its also nullpointerexception. and why xmlns?
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    3. COPlease read JSF 2.0 books/tutorials/resources if you want to learn JSF 2.0 and not JSF 1.x ones. You're using JSP which is deprecated since JSF 2.0 more than 3 years ago. This indicates that you were reading completely outdated books/tutorials/resources. Also, the presence of `standard-1.1.2.jar` and `jsp-api-2.1.jar` files in your `/WEB-INF/lib` is scary. Your JSF API and impl JARs are also incompatibile in versions. Why exactly did you do that? Reading bad tutorials? Shooting in the dark? Those files would only cause portability trouble.
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