ClassCastException for ServletRequestAttributes

[kzwang]

0fea57d

In this commit, it casts the RequestAttribute to ServletRequestAttributes, however, in our project, we have some other RequestAttribute implementations based on AbstractRequestAttributes but not based on ServletRequestAttributes, and this fails with ClassCastException. This was working in Spring boot 2.1, but breaks in 2.2 with this change. Can this be changed to check if RequestAttribute is an instance of ServletRequestAttributes first?

[jgrandja]

@kzwang Thank you for reporting this. The fix is now in master and backported to 5.2.x.