Deploying a struts2 example app to liferay (5.1.1) i am facing this error
output:

13:07:39,410 INFO [STDOUT] 13:07:39,410 ERROR
[com.opensymphony.xwork2.interceptor.ParametersInterceptor]
ParametersInterceptor - [setParameters]: Unexpected Exception caught
setting 'struts.portlet.action' on 'class
com.opensymphony.xwork2.ActionSupport: Error setting
expression 'struts.portlet.action' with value '[Ljava.lang.String;@(protected)'

13:07:39,410 INFO [STDOUT] 13:07:39,410 ERROR
[com.opensymphony.xwork2.interceptor.ParametersInterceptor]
ParametersInterceptor - [setParameters]: Unexpected Exception caught
setting 'struts.portlet.mode' on 'class
com.opensymphony.xwork2.ActionSupport: Error setting
expression 'struts.portlet.mode' with value '[Ljava.lang.String;@(protected)'

Whats going wrong here? Any hints what might cause this? Should this work?
struts.portlet.mode and ...action, for what are they used?

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