--- loncom/lonnet/perl/lonnet.pm	2007/03/08 01:58:41	1.846
+++ loncom/lonnet/perl/lonnet.pm	2007/03/28 00:05:45	1.851
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.846 2007/03/08 01:58:41 albertel Exp $
+# $Id: lonnet.pm,v 1.851 2007/03/28 00:05:45 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -35,7 +35,7 @@ use HTTP::Headers;
 use HTTP::Date;
 # use Date::Parse;
 use vars 
-qw(%perlvar %badServerCache %iphost %spareid 
+qw(%perlvar %badServerCache %spareid 
    %pr %prp $memcache %packagetab 
    %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount 
    %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %coursetypebuf
@@ -144,6 +144,20 @@ sub logperm {
     return 1;
 }
 
+sub create_connection {
+    my ($server) = @_;
+    my $client=IO::Socket::UNIX->new(Peer    => $perlvar{'lonSockCreate'},
+				     Type    => SOCK_STREAM,
+				     Timeout => 10);
+    return 0 if (!$client);
+    print $client ("$server\n");
+    my $result = <$client>;
+    chomp($result);
+    return 1 if ($result eq 'done');
+    return 0;
+}
+
+
 # -------------------------------------------------- Non-critical communication
 sub subreply {
     my ($cmd,$server)=@_;
@@ -170,8 +184,10 @@ sub subreply {
 				      Timeout => 10);
 	if($client) {
 	    last;		# Connected!
+	} else {
+	    &create_connection(&hostname($server));
 	}
-	sleep(1);		# Try again later if failed connection.
+        sleep(1);		# Try again later if failed connection.
     }
     my $answer;
     if ($client) {
@@ -1010,10 +1026,16 @@ my %remembered;
 my %accessed;
 my $kicks=0;
 my $hits=0;
+sub make_key {
+    my ($name,$id) = @_;
+    if (length($id) > 200) { $id=length($id).':'.&Digest::MD5::md5_hex($id); }
+    return &escape($name.':'.$id);
+}
+
 sub devalidate_cache_new {
     my ($name,$id,$debug) = @_;
     if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
-    $id=&escape($name.':'.$id);
+    $id=&make_key($name,$id);
     $memcache->delete($id);
     delete($remembered{$id});
     delete($accessed{$id});
@@ -1021,7 +1043,7 @@ sub devalidate_cache_new {
 
 sub is_cached_new {
     my ($name,$id,$debug) = @_;
-    $id=&escape($name.':'.$id);
+    $id=&make_key($name,$id);
     if (exists($remembered{$id})) {
 	if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
 	$accessed{$id}=[&gettimeofday()];
@@ -1044,7 +1066,7 @@ sub is_cached_new {
 
 sub do_cache_new {
     my ($name,$id,$value,$time,$debug) = @_;
-    $id=&escape($name.':'.$id);
+    $id=&make_key($name,$id);
     my $setvalue=$value;
     if (!defined($setvalue)) {
 	$setvalue='__undef__';
@@ -6176,7 +6198,8 @@ sub packages_tab_default {
 	    $do_default=1;
 	} elsif ($pack_type eq 'extension') {
 	    push(@extension,[$package,$pack_type,$pack_part]);
-	} else {
+	} elsif ($pack_part eq $part) {
+	    # only look at packages defaults for packages that this id is
 	    push(@specifics,[$package,$pack_type,$pack_part]);
 	}
     }
@@ -7671,36 +7694,39 @@ BEGIN {
     }
 }
 
-sub get_hosts_from_ip {
-    my ($ip) = @_;
-    my %iphosts = &get_iphost();
-    if (ref($iphosts{$ip})) {
-	return @{$iphosts{$ip}};
+{ 
+    my %iphost;
+    sub get_hosts_from_ip {
+	my ($ip) = @_;
+	my %iphosts = &get_iphost();
+	if (ref($iphosts{$ip})) {
+	    return @{$iphosts{$ip}};
+	}
+	return;
     }
-    return;
-}
-
-sub get_iphost {
-    if (%iphost) { return %iphost; }
-    my %name_to_ip;
-    my %hostname = &all_hostnames();
-    foreach my $id (keys(%hostname)) {
-	my $name=$hostname{$id};
-	my $ip;
-	if (!exists($name_to_ip{$name})) {
-	    $ip = gethostbyname($name);
-	    if (!$ip || length($ip) ne 4) {
-		&logthis("Skipping host $id name $name no IP found");
-		next;
+    
+    sub get_iphost {
+	if (%iphost) { return %iphost; }
+	my %name_to_ip;
+	my %hostname = &all_hostnames();
+	foreach my $id (keys(%hostname)) {
+	    my $name=$hostname{$id};
+	    my $ip;
+	    if (!exists($name_to_ip{$name})) {
+		$ip = gethostbyname($name);
+		if (!$ip || length($ip) ne 4) {
+		    &logthis("Skipping host $id name $name no IP found");
+		    next;
+		}
+		$ip=inet_ntoa($ip);
+		$name_to_ip{$name} = $ip;
+	    } else {
+		$ip = $name_to_ip{$name};
 	    }
-	    $ip=inet_ntoa($ip);
-	    $name_to_ip{$name} = $ip;
-	} else {
-	    $ip = $name_to_ip{$name};
+	    push(@{$iphost{$ip}},$id);
 	}
-	push(@{$iphost{$ip}},$id);
+	return %iphost;
     }
-    return %iphost;
 }
 
 # ------------------------------------------------------ Read spare server file