Diff for /loncom/lonmaxima between versions 1.34 and 1.35

version 1.34, 2007/11/09 18:47:01 version 1.35, 2007/11/09 18:51:10
Line 44  use strict; Line 44  use strict;
 # global variables  # global variables
 my $PREFORK                = 5;        # number of children to maintain  my $PREFORK                = 5;        # number of children to maintain
 my $MAX_CLIENTS_PER_CHILD  = 50;       # number of clients each child should process  my $MAX_CLIENTS_PER_CHILD  = 50;       # number of clients each child should process
   my $extra_children         = 0;
 my %children               = ();       # keys are current child process IDs  my %children               = ();       # keys are current child process IDs
 my $children               = 0;        # current number of children  my $children               = 0;        # current number of children
 my $status;                            # string for current status  my $status;                            # string for current status
Line 60  sub REAPER {                        # ta Line 61  sub REAPER {                        # ta
                                     # and MAXIMA processes                                      # and MAXIMA processes
     $SIG{CHLD} = \&REAPER;      $SIG{CHLD} = \&REAPER;
     my $pid = wait;      my $pid = wait;
     $children--;      if (exists($children{$pid})) {
     delete($children{$pid});   $children--;
    delete($children{$pid});
    if ($extra_children) {
       $extra_children--;
    }
       }    
 }  }
     
 sub HUNTSMAN {                      # signal handler for SIGINT  sub HUNTSMAN {                      # signal handler for SIGINT
Line 126  sub catchexception { Line 132  sub catchexception {
 }  }
   
   
   sub child_announce_death {
       $SIG{USR1} = \&child_announce_death;
       $extra_children++;
   }
   
 # ---------------------------------------------------------------- Main program  # ---------------------------------------------------------------- Main program
 # -------------------------------- Set signal handlers to record abnormal exits  # -------------------------------- Set signal handlers to record abnormal exits
Line 133  sub catchexception { Line 143  sub catchexception {
     
 $SIG{'QUIT'}=\&catchexception;  $SIG{'QUIT'}=\&catchexception;
 $SIG{__DIE__}=\&catchexception;  $SIG{__DIE__}=\&catchexception;
   $SIG{USR1} = \&child_announce_death;
     
 # ---------------------------------- Read loncapa_apache.conf and loncapa.conf  # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
 &status("Read loncapa.conf and loncapa_apache.conf");  &status("Read loncapa.conf and loncapa_apache.conf");
Line 212  for (1 .. $PREFORK) { Line 223  for (1 .. $PREFORK) {
 while (1) {  while (1) {
     &status('Parent process, sleeping');      &status('Parent process, sleeping');
     sleep;                          # wait for a signal (i.e., child's death)      sleep;                          # wait for a signal (i.e., child's death)
     for (my $i = $children; $i < $PREFORK; $i++) {      for (my $i = $children; $i < $PREFORK+$extra_children; $i++) {
         &status('Parent process, starting child');          &status('Parent process, starting child');
         &make_new_child($server);           # top up the child pool          &make_new_child($server);           # top up the child pool
     }      }
Line 238  sub make_new_child { Line 249  sub make_new_child {
     } else {      } else {
         # Child can *not* return from this subroutine.          # Child can *not* return from this subroutine.
                   
    my $ppid = getppid();
             
         # unblock signals          # unblock signals
         sigprocmask(SIG_UNBLOCK, $sigset)          sigprocmask(SIG_UNBLOCK, $sigset)
Line 274  sub make_new_child { Line 286  sub make_new_child {
                     last;                      last;
                 } elsif ($reply=~/^Error\:/) {                  } elsif ($reply=~/^Error\:/) {
                     &logthis('Died through '.$reply);                      &logthis('Died through '.$reply);
       kill('USR1' => $ppid);
                     $client->close();                      $client->close();
                     $command->hard_close();                           $command->hard_close();     
                     exit;                      exit;
Line 283  sub make_new_child { Line 296  sub make_new_child {
             }              }
         }          }
   
    kill('USR1' => $ppid);
  print $command ("quit();\n");   print $command ("quit();\n");
         # tidy up gracefully and finish          # tidy up gracefully and finish
   

Removed from v.1.34  
changed lines
  Added in v.1.35


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