The guestbook sample appln throws exceptions , any one can solve my
problem?
HTTP ERROR: 500
Unable to compile class for JSP
Generated servlet error:
[javac] Caused by: java.lang.ClassNotFoundException:
com.sun.tools.javac.Main
[javac] at java.net.URLClassLoader$1.run(Unknown Source)
[javac] at java.security.AccessController.doPrivileged(Native
Method)
[javac] at java.net.URLClassLoader.findClass(Unknown Source)
[javac] at java.lang.ClassLoader.loadClass(Unknown Source)
[javac] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown
Source)
[javac] at java.lang.ClassLoader.loadClass(Unknown Source)
[javac] Exception in thread "main" Could not find the main class:
com.sun.tools.javac.Main. Program will exit.
RequestURI=/
Caused by:
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
[javac] Caused by: java.lang.ClassNotFoundException:
com.sun.tools.javac.Main
[javac] at java.net.URLClassLoader$1.run(Unknown Source)
[javac] at java.security.AccessController.doPrivileged(Native
Method)
[javac] at java.net.URLClassLoader.findClass(Unknown Source)
[javac] at java.lang.ClassLoader.loadClass(Unknown Source)
[javac] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown
Source)
[javac] at java.lang.ClassLoader.loadClass(Unknown Source)
[javac] Exception in thread "main" Could not find the main class:
com.sun.tools.javac.Main. Program will exit.
at
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:
84)
at
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:
332)
at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:
412)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
at
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:
511)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:
295)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:
292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at com.google.appengine.tools.development.PrivilegedJspServlet.access
$101(PrivilegedJspServlet.java:23)
at com.google.appengine.tools.development.PrivilegedJspServlet
$2.run(PrivilegedJspServlet.java:59)
at java.security.AccessController.doPrivileged(Native Method)
at
com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java:
57)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
362)
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:
712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:268)
at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
at
com.google.appengine.tools.development.StaticFileUtils.serveWelcomeFileAsForward(StaticFileUtils.java:
80)
at
com.google.appengine.tools.development.LocalResourceFileServlet.maybeServeWelcomeFile(LocalResourceFileServlet.java:
254)
at
com.google.appengine.tools.development.LocalResourceFileServlet.doGet(LocalResourceFileServlet.java:
120)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1093)
at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
51)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1084)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1084)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
121)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1084)
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:
712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
139)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:352)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
506)
at org.mortbay.jetty.HttpConnection
$RequestHandler.headerComplete(HttpConnection.java:830)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
396)
at org.mortbay.thread.BoundedThreadPool
$PoolThread.run(BoundedThreadPool.java:442)
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