In my current application, I have a need to use threading to handle multiple instances of data that needs to be parsed in relative real time. Right now, I have everything working correctly to a point. Now with in the application I also need to run the application as a daemon.

The issue that I am seeing is that when the application iterates through the first time everything works fine. But as the second iteration starts the daemon dies. I have a small idea why it is happening, but not sure if it is correct.

So I come to you wise monks, humble as can be. Code below

Daemon.pm 
package Lib::Daemon;

    use base qw(Exporter);
    our @EXPORT = qw();

    use POSIX qw(setsid);

    use strict;

    sub daemonize {
        defined(my $pid = fork) or die "Can't fork: $!";
        exit if $pid;
        print $pid . "PID WAS \n\n";
        setsid() or die "Can't start a new session: $!";
    }

1;

__END__

[download]


Main.pl 
Lib::Daemon::daemonize();
print "Starting Daemon.... \n\n";
    my @thr = ();
    while(1){        
        main();
        sleep(60);
    }





sub threadMain{
    print "Child Thread $_[0] \n";
    print "***********************************************************
+*********************\n";
    parseMain($_[0],$_[1]);
    return 1;
}

sub main{
    my @instData = Lib::PLSInstance::getInstances();
    

    for(my $i = 0; $i < @instData; $i++){
        $thr[$i] = threads->new(\&threadMain, $instData[$i][2],$instDa
+ta[$i][1] ) or die "Thread Died: $!";
    }


    # start rejoining the threads
    for (my $i = 0; $i < @instData; $i++) {
       print "Joining thread $i\n";
       $thr[$i]->join() or die "Thread die on join: $!";
       print "\tThread $i joined back with the parent\n";
    }
    
}

[download]

In reply to Threading + Daemons troubles by rottmanja

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