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From "Bill Barker" <>
Subject Re: Tomcat startup error
Date Sat, 10 Apr 2010 21:33:55 GMT

"Christopher Schultz" <> wrote in message
> Hash: SHA1
> Harry,
> On 4/9/2010 2:01 PM, Harry Metske wrote:
>> you are using some piece of software (com.mypkg.packaging.*) that is 
>> calling
>> tomcat code.
>> It expects to find a method in org.apache.tomcat.util.IntrospectionUtils
>> that is no longer there in 6.0.26, which causes the NoSuchMethodError.
>> Basically your embedder does not support this version of Tomcat, you 
>> should
>> contact the vendor, they should do the recompile .
> It's interesting that the Java Runtime throws a NoSuchMethodError since
> the return type is not technically part of the method signature. I've
> never considered this before, and it totally makes sense because the
> return type really is an important part of the method. Just interesting
> to note that the effective method signature is not the same as the
> official one.
> Another thing to note is that the Tomcat folks have made an unstable
> change, here, by changing a public API. It would have been better to
> create a method with a new signature and deprecated the old one, while
> leaving it there.

The Tomcat developers have always considered this to be part of the internal 
API, not the public API.  This is true of most of the classes under the 
org.apache.tomcat package.

> - -chris
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