Index: lams_central/web/WEB-INF/web.xml
===================================================================
diff -u -rbf7188dd95898df53f786a38b116214d005c8fb2 -rf4d538fe4dbd4575c45b6fc3f203ea0bde22efa4
--- lams_central/web/WEB-INF/web.xml	(.../web.xml)	(revision bf7188dd95898df53f786a38b116214d005c8fb2)
+++ lams_central/web/WEB-INF/web.xml	(.../web.xml)	(revision f4d538fe4dbd4575c45b6fc3f203ea0bde22efa4)
@@ -645,6 +645,7 @@
 			<!-- Static resources -->
 			<url-pattern>/css/*</url-pattern>
 			<url-pattern>/errorpages/*</url-pattern>
+			<url-pattern>/error.jsp</url-pattern>
 			<url-pattern>/images/*</url-pattern>
 			<url-pattern>/includes/javascript/*</url-pattern>
 			<url-pattern>/includes/font-awesome/*</url-pattern>
Index: lams_common/src/java/org/lamsfoundation/lams/web/session/SessionManager.java
===================================================================
diff -u -r68d929f2345407cf503c29c3903fb0127dd3f848 -rf4d538fe4dbd4575c45b6fc3f203ea0bde22efa4
--- lams_common/src/java/org/lamsfoundation/lams/web/session/SessionManager.java	(.../SessionManager.java)	(revision 68d929f2345407cf503c29c3903fb0127dd3f848)
+++ lams_common/src/java/org/lamsfoundation/lams/web/session/SessionManager.java	(.../SessionManager.java)	(revision f4d538fe4dbd4575c45b6fc3f203ea0bde22efa4)
@@ -90,23 +90,12 @@
 	    HttpSession existingSession = loginMapping.get(login);
 	    // check if it's a different session and if so, which one is newer
 	    if (existingSession != null && !existingSession.getId().equals(sessionId)) {
-		if (session.getCreationTime() > existingSession.getCreationTime()) {
-		    try {
-			// invalidate the other session
-			existingSession.invalidate();
-		    } catch (Exception e) {
-			log.warn("SessionMananger invalidation exception", e);
-			// if it was already invalidated, do nothing
-		    }
-		} else {
-		    try {
-			// invalidate this session
-			session.invalidate();
-		    } catch (Exception e) {
-			log.warn("SessionMananger invalidation exception", e);
-			// if it was already invalidated, do nothing
-		    }
-		    throw new SecurityException("You were logged out");
+		try {
+		    // invalidate the other session
+		    existingSession.invalidate();
+		} catch (Exception e) {
+		    log.warn("SessionMananger invalidation exception", e);
+		    // if it was already invalidated, do nothing
 		}
 	    }
 	    loginMapping.put(login, session);
Index: lams_common/src/java/org/lamsfoundation/lams/web/session/SystemSessionFilter.java
===================================================================
diff -u -r7475d08afc280b5e2e5ddf04e8bf35e3166aaf80 -rf4d538fe4dbd4575c45b6fc3f203ea0bde22efa4
--- lams_common/src/java/org/lamsfoundation/lams/web/session/SystemSessionFilter.java	(.../SystemSessionFilter.java)	(revision 7475d08afc280b5e2e5ddf04e8bf35e3166aaf80)
+++ lams_common/src/java/org/lamsfoundation/lams/web/session/SystemSessionFilter.java	(.../SystemSessionFilter.java)	(revision f4d538fe4dbd4575c45b6fc3f203ea0bde22efa4)
@@ -41,6 +41,9 @@
  * @author Steve.Ni
  */
 public class SystemSessionFilter implements Filter {
+
+    private static final String CONTEXT_ERROR_PAGE = "/error.jsp";
+
     @Override
     public void init(FilterConfig config) throws ServletException {
     }
@@ -54,7 +57,15 @@
 	    return;
 	}
 
-	SessionManager.startSession((HttpServletRequest) request);
+	HttpServletRequest httpRequest = (HttpServletRequest) request;
+	String requestURI = httpRequest.getRequestURI();
+	if (requestURI.endsWith(CONTEXT_ERROR_PAGE)) {
+	    // do not create a session for displaying error page
+	    chain.doFilter(request, response);
+	    return;
+	}
+
+	SessionManager.startSession(httpRequest);
 	// do following part of chain
 	chain.doFilter(request, response);
 	SessionManager.endSession();