JSP Compile Errors. Can't find compile error output

[puddlesofjoy]

With latest version of GWT and Google Eclipse Plugin.
I have created a project with GWT only (no App Engine)

If I have any references to an external class in my jsp page I am
getting errors (despite having a 'page import'). The fact that it
isn't compiling isn't really what worries me.

What I really need is to be able to see what the actual errors are so
I can diagnose the problem. Even with my log level set to 'All' the
most useful error information I can see in the Hosted Mode console is
shown below. Every exception log item just refers me to the 'compiler
error output'.
Where can I find the jsp compiler error output it is telling me to
check?

[SPAM] EXCEPTION
org.apache.jasper.JasperException: Unable to compile class for JSP
at org.apache.jasper.compiler.DefaultErrorHandler.javacError
(DefaultErrorHandler.java:97)
at org.apache.jasper.compiler.ErrorDispatcher.javacError
(ErrorDispatcher.java:346)
at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:
414)
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 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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: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:320)
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)
Caused by: org.apache.tools.ant.BuildException: Compile failed; see
the compiler error output for details.
at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:933)
at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:757)
at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:
382)
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 javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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: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:320)
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)

[Rajeev Dayal]

Are you hitting the JSP page in your browser? The error output should be displayed there.

[denizstij]

As Rajeev pointed out, error message is there .

org.apache.jasper.JasperException: Unable to compile class for JSP

I had this issue with GWT 1.6.4 and now with 1.7. I added Tomcat
Dependency libraries (Tomcat's/common/lib) to class path. And the
issue is resolved. One important note: Tomcat's Dependency libraries
must be before GWT developer library in your class path.

Hope it helps

Deniz

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