HTTP Status 500 – Internal Server Error


Type Exception Report

Message java.lang.NullPointerException: Cannot invoke "org.xenbase.literature.beans.PaperBean.getPmid()" because "pb" is null

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: java.lang.NullPointerException: Cannot invoke "org.xenbase.literature.beans.PaperBean.getPmid()" because "pb" is null
	org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:508)
	org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:415)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:225)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1950)
	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:469)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:655)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	org.xenbase.utility.filters.UmbrellaGeneFilter.doFilter(UmbrellaGeneFilter.java:38)
	org.xenbase.utility.filters.HTTPStoHTTP.doFilter(HTTPStoHTTP.java:171)
	org.xenbase.utility.filters.RetrieveUserFilter.doFilter(RetrieveUserFilter.java:96)

Root Cause

java.lang.NullPointerException: Cannot invoke "org.xenbase.literature.beans.PaperBean.getPmid()" because "pb" is null
	org.xenbase.literature.actions.ArticleAction.display(ArticleAction.java:79)
	jdk.internal.reflect.GeneratedMethodAccessor739.invoke(Unknown Source)
	java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.base/java.lang.reflect.Method.invoke(Method.java:568)
	org.apache.struts.extras.actions.DispatchAction.dispatchMethod(DispatchAction.java:273)
	org.apache.struts.extras.actions.DispatchAction.execute(DispatchAction.java:173)
	org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:413)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:225)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1950)
	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:469)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:655)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	org.xenbase.utility.filters.UmbrellaGeneFilter.doFilter(UmbrellaGeneFilter.java:38)
	org.xenbase.utility.filters.HTTPStoHTTP.doFilter(HTTPStoHTTP.java:171)
	org.xenbase.utility.filters.RetrieveUserFilter.doFilter(RetrieveUserFilter.java:96)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat/9.0.58 (Ubuntu)