Fetching _eventId throws uncaught ClassCastException if it is not a String [SPR-5349]

[spring-projects-issues]

Paul Chapman opened SPR-5349 and commented

The code in AbstractMvcView.determineEventId uses WebUtils.findParameterValue to fetch the Webflow _eventId. That code assumes it will be passed a String. If the parameter is not a String a ClassCastException is thrown.

I was supplying the eventId as a hidden field, but had erroneously supplied it twice. Thus _eventId was no longer a String but was actually multi-valued. My error certainly, but it shouldn't break the code.

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Affects: 2.5.6

[spring-projects-issues]

Keith Donald commented

This is a issue with WebUtils.findParameterValue which resides in the Spring Framework project. Moving to SPR.

[spring-projects-issues]

Juergen Hoeller commented

This should already be fixed in 3.0 M1.

Juergen