javax.servlet.ServletException: java.lang.NullPointerException

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#{action.getLink()}: javax.el.ELException: java.lang.NullPointerException
javax.servlet.ServletException: java.lang.NullPointerException
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:158)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1443)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1384)
at uk.co.orange.bi.cd.ra.log.PerformanceMonitorFilter.doFilter(PerformanceMonitorFilter.java:46)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:236)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:188)
at org.springframework.security.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:109)
at org.springframework.security.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
at org.springframework.security.ui.SessionFixationProtectionFilter.doFilterHttp(SessionFixationProtectionFilter.java:67)
at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)
at org.springframework.security.ui.ExceptionTranslationFilter.doFilterHttp(ExceptionTranslationFilter.java:101)
at org.springframework.security.ui.SpringSecurityFilter.doFilter(SpringSecurityFilter.java:53)

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