--- loncom/lonnet/perl/lonnet.pm	2002/12/05 22:59:37	1.306
+++ loncom/lonnet/perl/lonnet.pm	2002/12/06 12:55:44	1.310
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.306 2002/12/05 22:59:37 albertel Exp $
+# $Id: lonnet.pm,v 1.310 2002/12/06 12:55:44 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -80,7 +80,8 @@ use vars
 qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom 
    %libserv %pr %prp %metacache %packagetab %titlecache 
    %courselogs %accesshash $processmarker $dumpcount 
-   %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
+   %coursedombuf %coursehombuf %courseresdatacache 
+   %domaindescription);
 use IO::Socket;
 use GDBM_File;
 use Apache::Constants qw(:common :http);
@@ -142,8 +143,8 @@ sub reply {
     unless (defined($hostname{$server})) { return 'no_such_host'; }
     my $answer=subreply($cmd,$server);
     if ($answer eq 'con_lost') {
-       #sleep 5; 
-       #$answer=subreply($cmd,$server);
+       sleep 5; 
+       $answer=subreply($cmd,$server);
        #if ($answer eq 'con_lost') {
 	#   &logthis("Second attempt con_lost on $server");
         #   my $peerfile="$perlvar{'lonSockDir'}/$server";
@@ -202,7 +203,6 @@ sub critical {
                " Critical message to unknown server ($server)</font>");
         return 'no_such_host';
     }
-    sleep 2;
     my $answer=reply($cmd,$server);
     if ($answer eq 'con_lost') {
         my $pingreply=reply('ping',$server);
@@ -2848,27 +2848,35 @@ sub EXT {
 	    my $courselevelm=$courseid.'.'.$mapparm;
 
 # ----------------------------------------------------------- first, check user
-	    my %resourcedata=&get('resourcedata',
-				  [$courselevelr,$courselevelm,$courselevel],
-				 $udom,$uname);
-	    my ($tmp)=keys(%resourcedata);
-	    &Apache::lonnet::logthis("Returned $tmp: ".join(':',keys(%resourcedata)));
-	    if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
-
-		if ($resourcedata{$courselevelr}) {
-		    return $resourcedata{$courselevelr}; }
-		if ($resourcedata{$courselevelm}) {
-		    return $resourcedata{$courselevelm}; }
-		if ($resourcedata{$courselevel}) {
-		    return $resourcedata{$courselevel}; }
-	    } else {
-		if ($tmp!~/No such file/) {
-		    &logthis("<font color=blue>WARNING:".
-			     " Trying to get resource data for ".
-			     $uname." at ".$udom.": ".
-			     $tmp."</font>");
-		} elsif ($tmp =~ /^(con_lost|no_such_host)/) {
-		  return $tmp;
+	    #most student don't have any data set, check if there is some data
+            #every thirty minutes
+	    if (!
+		(exists($ENV{'cache.studentresdata'})
+		    && (($ENV{'cache.studentresdata'}+1800) > time))) {
+		my %resourcedata=&get('resourcedata',
+				      [$courselevelr,$courselevelm,$courselevel],
+				      $udom,$uname);
+		my ($tmp)=keys(%resourcedata);
+		if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
+		    if ($resourcedata{$courselevelr}) {
+			return $resourcedata{$courselevelr}; }
+		    if ($resourcedata{$courselevelm}) {
+			return $resourcedata{$courselevelm}; }
+		    if ($resourcedata{$courselevel}) {
+			return $resourcedata{$courselevel}; }
+		} else {
+		    if ($tmp!~/No such file/) {
+			&logthis("<font color=blue>WARNING:".
+				 " Trying to get resource data for ".
+				 $uname." at ".$udom.": ".
+				 $tmp."</font>");
+		    } elsif ($tmp=~/error:No such file/) {
+			$ENV{'cache.studentresdata'}=time;
+			&appenv(('cache.studentresdata'=>
+				 $ENV{'cache.studentresdata'}));
+		    } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
+			return $tmp;
+		    }
 		}
 	    }