--- loncom/lonnet/perl/lonnet.pm	2007/02/23 00:23:46	1.835
+++ loncom/lonnet/perl/lonnet.pm	2007/02/23 15:49:23	1.836
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.835 2007/02/23 00:23:46 albertel Exp $
+# $Id: lonnet.pm,v 1.836 2007/02/23 15:49:23 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -201,8 +201,7 @@ sub reply {
 # ----------------------------------------------------------- Send USR1 to lonc
 
 sub reconlonc {
-    my $peerfile=shift;
-    &logthis("Trying to reconnect for $peerfile");
+    &logthis("Trying to reconnect lonc");
     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
     if (open(my $fh,"<$loncfile")) {
 	my $loncpid=<$fh>;
@@ -211,19 +210,13 @@ sub reconlonc {
 	    &logthis("lonc at pid $loncpid responding, sending USR1");
             kill USR1 => $loncpid;
             sleep 1;
-            if (-e "$peerfile") { return; }
-            &logthis("$peerfile still not there, give it another try");
-            sleep 5;
-            if (-e "$peerfile") { return; }
-            &logthis(
-  "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
-        } else {
+         } else {
 	    &logthis(
                "<font color=\"blue\">WARNING:".
                " lonc at pid $loncpid not responding, giving up</font>");
         }
     } else {
-     &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
+	&logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
     }
 }
 
@@ -615,9 +608,15 @@ sub authenticate {
     my ($uname,$upass,$udom)=@_;
     $upass=&escape($upass);
     $uname= &LONCAPA::clean_username($uname);
-    my $uhome=&homeserver($uname,$udom);
-    if (!$uhome) {
-	&logthis("User $uname at $udom is unknown in authenticate");
+    my $uhome=&homeserver($uname,$udom,1);
+    if ((!$uhome) || ($uhome eq 'no_host')) {
+# Maybe the machine was offline and only re-appeared again recently?
+        &reconlonc();
+# One more
+	my $uhome=&homeserver($uname,$udom,1);
+	if ((!$uhome) || ($uhome eq 'no_host')) {
+	    &logthis("User $uname at $udom is unknown in authenticate");
+	}
 	return 'no_host';
     }
     my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
@@ -647,7 +646,8 @@ sub homeserver {
 		 exists($badServerCache{$tryserver}));
 	if ($hostdom{$tryserver} eq $udom) {
            my $answer=reply("home:$udom:$uname",$tryserver);
-           if ($answer eq 'found') { 
+           if ($answer eq 'found') {
+               delete($badServerCache{$tryserver}); 
 	       return $homecache{$index}=$tryserver;
            } elsif ($answer eq 'no_host') {
 	       $badServerCache{$tryserver}=1;