Make JSP 2.1 optional 
----------------------

                 Key: MYFACES-1693
                 URL: https://issues.apache.org/jira/browse/MYFACES-1693
             Project: MyFaces Core
          Issue Type: Improvement
          Components: JSR-252
    Affects Versions:  1.2.0
            Reporter: Achim Hügen


Myfaces 1.2.0 requires JSP 2.1 to be present. Otherwise the 
StartupServletContextListener fails with this error:

Exception sending context initialized event to listener instance of class 
org.apache.myfaces.webapp.StartupServletContextListener
java.lang.NoSuchMethodError: 
javax.servlet.jsp.JspFactory.getJspApplicationContext(Ljavax/servlet/ServletContext;)Ljavax/servlet/jsp/JspApplicationContext;
        at 
org.apache.myfaces.webapp.DefaultFacesInitializer.initFaces(DefaultFacesInitializer.java:102)
        at 
org.apache.myfaces.webapp.StartupServletContextListener.contextInitialized(StartupServletContextListener.java:57)
 

JSP version 2.1 or better JSP in general should be an optional dependency, like 
discussed here and implemented in Sun RI too:
http://www.nabble.com/Does-MyFaces-1.2-require-JSP-2.1--tf4112432.html#a11693501

Use cases: 
- Run Myfaces 1.2.0 in JEE 1.4 environment (Tomcat 5.x). 
- Easier setup and smaller distributions when running Myfaces in an embedded 
servlet container (jetty) with facelets. For example I'm using jetty for junit 
tests. I haven't found a working setup which solves the jsp problems.






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