Joseph Wolschon created WW-4433:
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Summary: ConventionUnknownHandler change breaks exception handling
in interceptors.
Key: WW-4433
URL: https://issues.apache.org/jira/browse/WW-4433
Project: Struts 2
Issue Type: Bug
Components: Core Interceptors, Documentation, Plugin - Convention
Affects Versions: 2.3.20
Reporter: Joseph Wolschon
Priority: Minor
Struts 2.3.20 appears to have caused a regression that prevents exceptions
thrown from convention-plugin actions from reaching
ExceptionMappingInterceptor. This breaks exception handling when using the
convention-plugin.
To Reproduce:
* Generate a project struts2-archetype-convention archetype using 2.3.20
* Throw exception in the action. With 2.3.20, a blank page is shown.
* Change to 2.3.16.3 and you will get the standard struts2 error page.
The breaking change appears to have been made in WW-4331:
https://issues.apache.org/jira/browse/WW-4331. This causes error interceptor
code to break (showing a blank page when exceptions are thrown) as
DefaultActionInvocation does not catch an exception from the default
UnknownHandler implementation execution, which would previously re-throw the
original exception back up for the interceptors to catch.
Workaround:
We've created our own UnknownHandler implementation that just throws a new
NoSuchMethodException, allowing DefaultActionInvocation to re-throw the
original exception so that our error interceptor can again catch it.
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