I answered my own question. I was not including an important .jar file in
the CLASSPATH.
At 08:49 PM 5/27/2005, you wrote:
I am trying to embed tomcat in an application. I am using Sun Java 1.5
and Tomcat 5.5.9. During the tomcat startup, I receive the following error:
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at
org.apache.jasper.JspCompilationContext.createCompiler(JspCompilationContext.java:220)
I looked at the JspCompilationContext.java code and found the block where
the NullPointerException occurs:
/**
* Create a "Compiler" object based on some init param data. This
* is not done yet. Right now we're just hardcoding the actual
* compilers that are created.
*/
public Compiler createCompiler() throws JasperException {
if (jspCompiler != null ) {
return jspCompiler;
}
jspCompiler = null;
if (options.getCompiler() == null) {
jspCompiler =
createCompiler("org.apache.jasper.compiler.JDTCompiler");
if (jspCompiler == null) {
jspCompiler =
createCompiler("org.apache.jasper.compiler.AntCompiler");
}
} else {
jspCompiler =
createCompiler("org.apache.jasper.compiler.AntCompiler");
if (jspCompiler == null) {
jspCompiler =
createCompiler("org.apache.jasper.compiler.JDTCompiler");
}
}
jspCompiler.init(this, jsw);
return jspCompiler;
}
private static Compiler createCompiler(String className) {
Compiler compiler = null;
try {
compiler = (Compiler) Class.forName(className).newInstance();
} catch (Throwable t) {
// Log ?
// FIXME: log
}
return compiler;
}
I was somewhat concerned by the comments within the block. I thought I
would ask if there is an open bug in this area before I continued picking
apart my own code. Is this a bug in Tomcat? If so, is there a
work-around? If not, how should I proceed?
Thank you in advance,
Mark
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