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Why isnt my Tomcat Serving JSP

Hey There,

Okay this under WindowsXP Professional.

1) Okay I have installed J2SE 1.4 from sun.com
2) Set JAVA_HOME env variable to the directory that the above was installed into.
3) Then also downloaded and installed Tomcat 4.0.3. from sun/apache.

If i goto http://localhost:8080/ in Internet Explorer then I get the Tomcat welcome page appear. On the left of the welcome page is a menu containing some links to some examples.

If i Follow the 'Servlets Examples' link and execute a couple of the example servlets they all seem to work fine.

HOWEVER if I follow the 'JSP Examples' link and try executing any of the examples or any other JSP page for that matter I get a HTTP 500 Internal Server Error.

Whats wrong with my Tomcat (its a fresh install) why will it serve servlets but not JSP pages corectly.

Thanks

Adam Retter
Network and Systems Administrator
Project COSMIC
www.cosmic.org.uk
adam@cosmic.org.uk
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adamretter
Asked:
adamretter
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1 Solution
 
cheekycjCommented:
Is your setup done properly.. like paths etc.

CJ
0
 
rrzCommented:
What  is the rest of that error message?  
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adamretterAuthor Commented:
Okay here is the error page produced when I try and Execute the NumberGuess JSP example:


Apache Tomcat/4.0.3 - HTTP Status 500 - Internal Server Error

--------------------------------------------------------------------------------

type Exception report

message Internal Server Error

description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: sun/tools/javac/Main
      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:485)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
      at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
      at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1012)
      at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107)
      at java.lang.Thread.run(Unknown Source)


root cause

java.lang.NoClassDefFoundError: sun/tools/javac/Main
      at org.apache.jasper.compiler.SunJavaCompiler.compile(SunJavaCompiler.java:136)
      at org.apache.jasper.compiler.Compiler.compile(Compiler.java:272)
      at org.apache.jasper.servlet.JspServlet.loadJSP(JspServlet.java:552)
      at org.apache.jasper.servlet.JspServlet$JspServletWrapper.loadIfNecessary(JspServlet.java:177)
      at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:189)
      at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382)
      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
      at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
      at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1012)
      at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107)
      at java.lang.Thread.run(Unknown Source)

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cheekycjCommented:
maybe its not finding the libs to compile the JSP...
make sure that JDK path is there and the proper libs are
in the classpath.

CJ
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adamretterAuthor Commented:
Where do I find these ?
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cheekycjCommented:
the JDK path should actually be there.. tomcat won't work at all without it.

You need to include the c:\jdk1.4\lib\tools.jar file in your CLASSPATH...

or copy tools.jar to the tomcat\lib directory.

CJ


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adamretterAuthor Commented:
I dont have a tools.jar as far as i can see.

I have installed j2re1.4.0 is that right?
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cheekycjCommented:
you need JDK not JRE.  Since tomcat needs to compile JSPs into Servlets.. it needs the JDK to do that.  JRE is just for running java programs not compiling them.

I would uninstall the JRE and install JDK 1.4 b/c that comes with JRE too.

CJ
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adamretterAuthor Commented:
Seems to have fixed it thanks.

I needed the SDK instead of the JRE - found the sun website a little confusing but got the right one in the end.

Thanks
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cheekycjCommented:
Glad I could help and Thanx for the "A"
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