--- loncom/loncron	2014/12/16 18:18:44	1.101
+++ loncom/loncron	2017/10/20 13:38:34	1.103.2.1
@@ -2,7 +2,7 @@
 
 # Housekeeping program, started by cron, loncontrol and loncron.pl
 #
-# $Id: loncron,v 1.101 2014/12/16 18:18:44 raeburn Exp $
+# $Id: loncron,v 1.103.2.1 2017/10/20 13:38:34 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -300,6 +300,7 @@ sub start_logging {
 <li><a href="#machine">Machine Information</a></li>
 <li><a href="#tmp">Temporary Files</a></li>
 <li><a href="#tokens">Session Tokens</a></li>
+<li><a href="#webdav">WebDAV Session Tokens</a></li>
 <li><a href="#httpd">httpd</a></li>
 <li><a href="#lonsql">lonsql</a></li>
 <li><a href="#lond">lond</a></li>
@@ -499,6 +500,32 @@ sub clean_lonIDs {
     &log($fh,"<h3>$active open session(s)</h3>");
 }
 
+# ------------------------------------------------ clean out webDAV Session IDs
+sub clean_webDAV_sessionIDs {
+    my ($fh)=@_;
+    if ($perlvar{'lonRole'} eq 'library') {
+        &log($fh,'<hr /><a name="webdav" /><h2>WebDAV Session Tokens</h2>');
+        my $cleaned=0;
+        my $active=0;
+        my $now = time;
+        if (-d $perlvar{'lonDAVsessDir'}) {
+            while (my $fname=<$perlvar{'lonDAVsessDir'}/*>) {
+                my @stats = stat($fname);
+                my $since=$now-$stats[9];
+                if ($since>$perlvar{'lonExpire'}) {
+                    $cleaned++;
+                    &log($fh,"Unlinking $fname<br />");
+                    unlink("$fname");
+                } else {
+                    $active++;
+                }
+            }
+            &log($fh,"<p>Cleaned up ".$cleaned." stale webDAV session token(s).</p>");
+            &log($fh,"<h3>$active open webDAV session(s)</h3>");
+        }
+    }
+}
+
 # ----------------------------------------------------------- clean out sockets
 sub clean_sockets {
     my ($fh)=@_;
@@ -617,9 +644,15 @@ sub check_delayed_msg {
 
     my $unsend=0;
 
+    my %hostname = &Apache::lonnet::all_hostnames();
+    my $numhosts = scalar(keys(%hostname));
+
     my $dfh=IO::File->new("$perlvar{'lonDaemons'}/logs/lonnet.perm.log");
     while (my $line=<$dfh>) {
 	my ($time,$sdf,$dserv,$dcmd)=split(/:/,$line);
+        if ($numhosts) {
+            next unless ($hostname{$dserv});
+        }
 	if ($sdf eq 'F') { 
 	    my $local=localtime($time);
 	    &log($fh,"<b>Failed: $time, $dserv, $dcmd</b><br />");
@@ -646,8 +679,6 @@ sub check_delayed_msg {
     }
     &log($fh,"</pre>\n");
     close (DFH);
-    my %hostname = &Apache::lonnet::all_hostnames();
-    my $numhosts = scalar(keys(%hostname));
 # pong to all servers that have delayed messages
 # this will trigger a reverse connection, which should flush the buffers
     foreach my $tryserver (sort(keys(%servers))) {
@@ -894,9 +925,23 @@ sub main () {
     }
 
 # -------------------------------------------- Force reload of host information
-    &Apache::lonnet::load_hosts_tab(1);
-    &Apache::lonnet::load_domain_tab(1);
-    &Apache::lonnet::get_iphost(1);
+    my $nomemcache;
+    if ($justcheckdaemons) {
+        $nomemcache=1;
+        my $memcachepidfile="$perlvar{'lonDaemons'}/logs/memcached.pid";
+        my $memcachepid;
+        if (-e $memcachepidfile) {
+            my $memfh=IO::File->new($memcachepidfile);
+            $memcachepid=<$memfh>;
+            chomp($memcachepid);
+            if ($memcachepid =~ /^\d+$/ && kill 0 => $memcachepid) {
+                undef($nomemcache);
+            }
+        }
+    }
+    &Apache::lonnet::load_hosts_tab(1,$nomemcache);
+    &Apache::lonnet::load_domain_tab(1,$nomemcache);
+    &Apache::lonnet::get_iphost(1,$nomemcache);
 
 # ----------------------------------------- Force firewall update for lond port  
 
@@ -933,6 +978,7 @@ sub main () {
 	&log_machine_info($fh);
 	&clean_tmp($fh);
 	&clean_lonIDs($fh);
+        &clean_webDAV_sessionIDs($fh);
 	&check_httpd_logs($fh);
 	&rotate_lonnet_logs($fh);
 	&rotate_other_logs($fh);