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Editorial Team
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Asked: 2026-05-26T16:41:27+00:00

I get this error: HTTP Status 500 – type Exception report message descriptionThe server

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I get this error:

HTTP Status 500 -

type Exception report

message

descriptionThe server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: java.lang.NullPointerException

root cause

java.lang.NullPointerException

note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 3.1-b24 logs.
GlassFish Server Open Source Edition 3.1-b24

when I try to forward from a jsp to another jsp or when I forward in a servlet… The thing is that Y modify some datils from my page and I want to go back to the login-page and log in again to see if the update was successful !… Any ideas on this error ?… Thankx

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1 Answer

  1. Editorial Team

    A NullPointerException is a rather trivial exception and has actually nothing to do with JSP/Servlets, but with basic Java in general (look, it’s an exception of java.lang package, not of javax.servlet package). It just means that some object is null while your code is trying to access/invoke it using the period . operator.

    Something like:

    SomeObject someObject = null;
someObject.doSomething(); // NullPointerException!

    The 1st line of the stacktrace tells you in detail all about the class name, method name and line number where it occurred.

    Fixing it is relatively easy. Just make sure that it’s not null or bypass the access altogether. You should rather concentrate on why it is null and/or why your code is trying to deal with null.

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