I have upgraded one of the project from Struts 2.3.x to 2.5.12. After this I see that the validations are not working. It is all fine in version 2.3. I debug the stack in validate method in action and see it has no field errors added.
I have created a sample project to test this and validations are not happening there too. Could you please help with this? I have attached the sample project.