Re: RE: EmptyStackException after upgrading Struts 2.3 to 2.5

I created a sample application that should help reproducing the error. https://github.com/lalo-mx/struts-json-example/ The error happened opening the app (localhost/struts-json-example) in 4 different browsers / sessions. >> By the way, Eduardo, you can also workaround this issue for now by >

EmptyStackException after upgrading Strut 2.3 to 2.5

Hi, I recently upgraded Struts from version 2.3.34 to 2.5.20. After doing the recommended fixes the application runs correctly but an exception started happening sporadically. The app is built and runs in JDK 8 with Tomcat 9.0.12 The app is a little big so i have not able to create an example