After upgrading to Struts 2.3.32, actions with request parameters in camel case such as xAxis and yAxis broke. Reverting to ognl-3.0.6.jar was recommended in bug
WW-4616 but it doesn't work because it throws this error:
We still have lots of struts 1 code so we can't upgrade to struts 2.5. I also tried using the ognl-3.1.12.jar from struts 2.5 but the camel case error is still there.