run time error

[ching0418]

hello,

i jusnt to ask help from you guys. what do the follwing error messages mean?

java.lang.AbstractMethodError
at javax.servlet.GenericServlet.getServletName(GenericServlet.java:368)
at javax.servlet.GenericServlet.log(GenericServlet.java:300)
at javax.servlet.GenericServlet.init(GenericServlet.java:257)
at sun.servlet.ServletLoader.loadServlet(ServletLoader.java:102)
at sun.servlet.http.HttpServer.getServlet(HttpServer.java:326)
at sun.servlet.http.HttpServerHandler.sendResponse(HttpServerHandler.java:152)
at sun.servlet.http.HttpServerHandler.handleConnection(HttpServerHandler.java:121)
at sun.servlet.http.HttpServerHandler.run(HttpServerHandler.java:90)
at java.lang.Thread.run(Thread.java:484)


TIA,
ching

 

[scrat]

Hi ching0418,

Here's what the Javadoc says about AbstractMethodError:

"Thrown when an application tries to call an abstract method. Normally, this error is caught by the compiler; this error can only occur at run time if the definition of some class has incompatibly changed since the currently executing method was last compiled."

It sounds as though there is something very different between what you are compiling with and what you are running with; perhaps there are different versions of jar files.

Take a close look at what you have in your classpath at compile and at run time. Even the order of classpath entries can have an adverse affect if there are class duplications.

Also try deleteing all your project .class files and doing a full rebuild in case there is something compiled that is no longer valid.

Hope this helps some.
scrat