--- loncom/auth/lonlogout.pm	2018/09/02 21:23:08	1.45.2.4
+++ loncom/auth/lonlogout.pm	2019/08/01 14:30:27	1.45.2.6
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Logout Handler
 #
-# $Id: lonlogout.pm,v 1.45.2.4 2018/09/02 21:23:08 raeburn Exp $
+# $Id: lonlogout.pm,v 1.45.2.6 2019/08/01 14:30:27 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -196,14 +196,14 @@ Due to security reasons in new web brows
         }
         if ($env{'request.sso.login'}
 	    && defined($r->dir_config("lonSSOUserLogoutMessageFile_$domain"))) {
-	    if (open(my $fh,$r->dir_config("lonSSOUserLogoutMessageFile_$domain"))) {
+	    if (open(my $fh,'<',$r->dir_config("lonSSOUserLogoutMessageFile_$domain"))) {
 	        $relogmessage.= join('',<$fh>);
                 close($fh);
             }
 	}
 	if ($env{'request.sso.login'}
 	    && defined($r->dir_config('lonSSOUserLogoutMessageFile'))) {
-	    if (open(my $fh,$r->dir_config('lonSSOUserLogoutMessageFile'))) {
+	    if (open(my $fh,'<',$r->dir_config('lonSSOUserLogoutMessageFile'))) {
 	        $relogmessage.= join('',<$fh>);
                 close($fh);
             }
@@ -217,6 +217,13 @@ $windowinfo
 $relogmessage
 $end_page
 ENDDOCUMENT
+    if ($env{'request.balancercookie'}) {
+        my ($balancer,$cookie) = split(/:/,$env{'request.balancercookie'});
+        if ((&Apache::lonnet::hostname($balancer)) && ($cookie =~ /^[a-f0-9]{32}$/)) {
+            $cookie = $env{'user.domain'}.'_'.$env{'user.name'}.'_'.$cookie;
+            &Apache::lonnet::delbalcookie($cookie,$balancer);
+        }
+    }
     $r->register_cleanup(\&flush_course_logs);
     return OK; 
 }