javax.servlet.ServletException: non-HTTP request or response

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non-HTTP request or response
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javax.servlet.ServletException: non-HTTP request or response
at javax.servlet.http.HttpServlet.service(
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(
at org.apache.catalina.core.ApplicationFilterChain.doFilter(
at org.apache.catalina.core.ApplicationDispatcher.invoke(
at org.apache.catalina.core.ApplicationDispatcher.doInclude(
at org.apache.catalina.core.ApplicationDispatcher.include(
at com.liferay.portlet.PortletRequestDispatcherImpl.dispatch(
at com.liferay.portlet.PortletRequestDispatcherImpl.include(
at org.springframework.web.portlet.DispatcherPortlet.doRender(
at org.springframework.web.portlet.DispatcherPortlet.render(
at org.springframework.web.portlet.DispatcherPortlet.doRenderService(
at org.springframework.web.portlet.FrameworkPortlet.processRequest(
at javax.portlet.GenericPortlet.render(

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