https://issues.apache.org/bugzilla/show_bug.cgi?id=47453
Summary: JasperException for deferred-method with return type
void
Product: Tomcat 6
Version: 6.0.20
Platform: PC
OS/Version: Windows XP
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
AssignedTo: [email protected]
ReportedBy: [email protected]
Created an attachment (id=23908)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=23908)
Zipped Eclipse 3.4 projects
I tried to get the JSF sample application bookstore6 from the SUN Java EE 5
Tutorial running.
Environment:
Tomcat Version : 6.0.20
Eclipse Version: 3.4
Java JDK Version: jdk1.5.0_17
See: http://java.sun.com/javaee/5/docs/tutorial/doc/bnara.html
I added jsf-api.jar, jsf-impl.jar and jstl-1.1.2.jar to Tomcat's lib directory,
then created the project (bookstoreJSF and utility project bookstore)and
populated it with the sample source files from the Java EE 5 tutorial.
I created a Tomcat Server in the Eclipse workspace and added the project to the
Tomcat Server.
The server and the web application started fine.
When I directed my browser (Firefox 3) at the starting page of the project
(http://localhost:8080/bookstoreJSF), I got a Jasper Exception:
org.apache.jasper.JasperException: /chooselocale.jsp(45,12) Unknown attribute
type (void) for attribute actionListener.
at
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
at
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
at
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:236)
at
org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:1099)
at
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:821)
at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1530)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)
at
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:840)
at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1530)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)
at
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:840)
at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1530)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)
at
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:840)
at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1530)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:495)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
at
org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1736)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:183)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:332)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:312)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:299)
at
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
at
com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:410)
at
com.sun.faces.application.ViewHandlerImpl.executePageToBuildView(ViewHandlerImpl.java:468)
at
com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:140)
at
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
at
org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:706)
at
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:677)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:91)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:595)
The problem comes from an actionListener defined in the taglib (see
bookstore.tld in the attached project bookstoreJSF) with a method-signature
using 'void' as return type.
I found no way to work around the problem. Then I looked up the source code for
org.apache.jasper.compiler.Validator.
>From what I understand, the (inner class) method
ValidateVisitor.checkXmlAttributes checks the deferred-method's return type
from the taglib. The call to JspUtil.toClass then fires a
ClassNotFoundException for the method's return type 'void'. This triggers the
JasperException 'invalid attribute type' that I see in the Tomcat console.
The test for a 'deferred-value' type is perfectly correct, but the return type
for a deferred-method should be legally specifiable as void.
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