Hi Matthew,
The params interceptor is calling setId on ActionSupport (the default
action), not on your action that has the setId method, so an exception is
being thrown as there's no matching setter whatsoever. You may have a
config error.
All params are treated as arrays because its valid in HTTP for the same
parameter to be specified multiple times in the same request.
The default type conversion will call setId(Integer id) using the first
element in the array if that's the first property to be matched.
The error is only logged when the exception occurs and this is
*infrequent* in normal use.
Hope that helps!
regards,
Jeromy Evans
> This appears to have been mentioned a number of times in the Struts 2
> and XWork forums but I cannot find a real answer:
>
>
>
> Using Struts 2.0.11 I am experiencing the following problem.
>
> I have an action with the method
>
> setId(Integer id) { ... }
>
> When this value is set via a HTTP request through the
> ParametersInterceptor it succeeds when using both GET and POST. However
> when a GET is performed I get the following exception logged
>
> SEVERE: ParametersInterceptor - [setParameters]: Unexpected Exception
> caught setting 'id' on 'class com.opensymphony.xwork2.ActionSupport:
> Error setting expression 'id' with value '[Ljava.lang.String;@1a1f635'
>
> XWork appears to store the a single GET parameters as an array of
> Strings and attempt to set the value using the String[] first, when that
> errors tries to convert it. The problem with this is it logs the first
> failure as an ERROR.
>
> Why is this happening and short of creating my own TypeConverter or
> blocking it in the logger config, how can I stop this error being logged
> for GET requests?
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Matthew Seaborn
>
> Software Architect
> t +44(0) 208 484 0729
> m +44(0) 7949 465 142
>
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> <mailto:[EMAIL PROTECTED]>
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>
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>
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