I've switched a project to using Tomcat 4.0.5 (trying to get source 
level debugging working). Now when I run tomcat from IDEA [build 651], 
it starts up ok, but when it tries to serve a file I get the following 
exception:

java.lang.NullPointerException
        at 
org.apache.jasper.compiler.TldLocationsCache.processJars(TldLocationsCache.java:203)
        at 
org.apache.jasper.compiler.TldLocationsCache.(TldLocationsCache.java:139)
        at org.apache.jasper.EmbededServletOptions.(EmbededServletOptions.java:345)
        at org.apache.jasper.servlet.JspServlet.init(JspServlet.java:266)
        at 
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:918)
        at 
org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:655)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
        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.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:2347)
        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:1027)
        at 
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
        at java.lang.Thread.run(Thread.java:484)

I've been playing around with the jars in the project. What's strange is 
that I took out the Tomcat jars altogether, and it still finds the 
bootstrap class, as long as I have "Include Project Classpath" checked. 
Where is it getting it from? If I don't have this checked then I get the 
error:

java.lang.NoClassDefFoundError: org/apache/catalina/startup/Bootstrap

Any ideas?

-Charlie Evett

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