Stephen Hartley wrote:
I have a run-time problem with a struts-based JSP.
Interesting thing is that this code has been working
for more than a year with no problems, but now errors
with HTTP 500 and JspException: "PropertyDescriptor:
internal error while merging PDs: type mismatch
between read and write methods". See full stack trace
below.
I've been searching around the list archives and note
Brian McClung has posted the same problem (see
postings on 2004-03-24 21:58:11 GMT and 2004-03-23
21:50:43 GMT) but as far as I can see there doesn't
seem to be an answer for this one. Likewise on the
Sun Java forum - see
http://forum.java.sun.com/thread.jspa?threadID=632668&tstart=90
The difference between JDK 1.3 and 1.4 is a change in the reflection
semantics; in 1.3 you could make a property both read-only and
write-only, which clearly doesn't make sense but worked anyway. 1.4
changed the introspection behaviour in this case, which might be what
you're seeing (assuming, since you referenced that URL, that you're
talking about a difference in your code's behaviour between the two JVMs).
I've checked that the setter and getter accept and
return the correct types OK. This is to be expected
really, because the code used to work and I haven't
changed it [intentionally!]....!
Bear in mind that this might be caused by changes elsewhere, such as a
super-class or, more likely, a related BeanInfo class. Without seeing
your Javabean and related BeanInfo classes I can't say anything
definitive, but check that *everything* affecting the property
descriptors, including BeanInfo classes, is as it should be.
L.
Can anyone give me some helpful pointers on this one?
Many thanks,
Steve
javax.servlet.jsp.JspException: Exception forwarding
for name loginSecured:
javax.servlet.ServletException: Exception accessing
property userAccountVO.
forcePwdChange for bean userSession: java.lang.Error:
PropertyDescriptor:
internal error while merging PDs: type mismatch
between read and write methods
at
org.apache.struts.taglib.logic.ForwardTag.doEndTag(ForwardTag.java:173)
at _index._jspService(index.jsp:5)
[/index.jsp]
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