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Showcase visualbuilder NPE, maybe jsp compile?

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Hello,

I would like to use the showcase project Visual Builder.
I got this exception below.
As i understood the hosted mode jetty unable to compile jsp classes.
I tried many options, workarounds, neithers worked for me.
(I build the war, and deploy it to a tomcat server. thats work. But for development is not acceptable.)

Could you give me advise to use JSP files in HOSTED mode JETTY?

Thank you in advance,
regard,
Szabi

Code:

[WARN] /showcase/showcase/tools/visualBuilder/index.jsp
java.lang.ClassNotFoundException: org.apache.jsp.showcase.tools.visualBuilder.index_jsp
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:158)
        at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:71)
        at org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:548)
        at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:136)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:307)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1097)
        at com.isomorphic.servlet.CompressionFilter.doFilter(CompressionFilter.java:260)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1088)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
        at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
        at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
        at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:324)
        at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
        at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
        at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
        at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
        at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
        at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)


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