--- loncom/lonnet/perl/lonnet.pm	2007/06/13 02:21:54	1.889
+++ loncom/lonnet/perl/lonnet.pm	2007/06/18 22:52:33	1.892
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.889 2007/06/13 02:21:54 albertel Exp $
+# $Id: lonnet.pm,v 1.892 2007/06/18 22:52:33 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -149,7 +149,7 @@ sub create_connection {
 				     Type    => SOCK_STREAM,
 				     Timeout => 10);
     return 0 if (!$client);
-    print $client (join(':',$hostname,$lonid,&machine_ids($lonid))."\n");
+    print $client (join(':',$hostname,$lonid,&machine_ids($hostname))."\n");
     my $result = <$client>;
     chomp($result);
     return 1 if ($result eq 'done');
@@ -214,6 +214,24 @@ sub reply {
 # ----------------------------------------------------------- Send USR1 to lonc
 
 sub reconlonc {
+    my ($lonid) = @_;
+    my $hostname = &hostname($lonid);
+    if ($lonid) {
+	my $peerfile="$perlvar{'lonSockDir'}/$hostname";
+	if ($hostname && -e $peerfile) {
+	    &logthis("Trying to reconnect lonc for $lonid ($hostname)");
+	    my $client=IO::Socket::UNIX->new(Peer    => $peerfile,
+					     Type    => SOCK_STREAM,
+					     Timeout => 10);
+	    if ($client) {
+		print $client ("reset_retries\n");
+		my $answer=<$client>;
+		#reset just this one.
+	    }
+	}
+	return;
+    }
+
     &logthis("Trying to reconnect lonc");
     my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
     if (open(my $fh,"<$loncfile")) {
@@ -7854,6 +7872,7 @@ sub get_dns {
     sub reset_hosts_info {
 	&reset_domain_info();
 	&reset_hosts_ip_info();
+	undef(%name_to_host);
 	undef(%hostname);
 	undef(%hostdom);
 	undef(%libserv);
@@ -7945,24 +7964,6 @@ sub get_dns {
     my %name_to_ip;
     my %lonid_to_ip;
 
-    my %valid_ip;
-    sub valid_ip {
-	my ($ip) = @_;
-	if (exists($iphost{$ip}) || exists($valid_ip{$ip})) {
-	    return 1;	
-	}
-	my $name = gethostbyip($ip);
-	my $lonid = &hostname($name);
-	if (defined($lonid)) {
-	    $valid_ip{$ip} = $lonid;
-	    return 1;
-	}
-	my %iphosts = &get_iphost();
-	if (ref($iphost{$ip})) {
-	    return 1;	
-	}
-    }
-
     sub get_hosts_from_ip {
 	my ($ip) = @_;
 	my %iphosts = &get_iphost();