Greetings monks,

I found that my program (which is supposed to run for a long time) is leaking memory at each iteration it executes. I have already checked that by monitoring memory consumption by the process, by using Devel::Gladiator and Devel::FindRef.

Devel::Gladiator shows that my FSA::Rules instances are not being terminated as expected. I also added debug messages to the DESTROY method with syswrite to check if the object's are being terminated in the expected order. Here is what I got by running my test script:

$ perl t/DaemonHeavyLeak.t
ListParser is gone
End of program
daemon is gone
FSA::Rules=HASH(0x2faeea8) [refcount 2] is
+- referenced by REF(0x2fa6ea8) [refcount 1], which is
|     not found anywhere I looked :(
+- referenced by REF(0x27a1578) [refcount 1], which is
   the lexical '$self' in CODE(0x27978b8) [refcount 4], which is
      the global &FSA::Rules::DESTROY.
FSA::Rules=HASH(0x2faeea8) [refcount 1] is
referenced by REF(0x2fa6ea8) [refcount 1], which is
      not found anywhere I looked :(
FSA::Rules is dead
FSA::Rules=HASH(0x2e7a198) [refcount 2] is
+- referenced by REF(0x2e7a768) [refcount 1], which is
|     not found anywhere I looked :(
+- referenced by REF(0x27a1578) [refcount 1], which is
   the lexical '$self' in CODE(0x27978b8) [refcount 4], which is
      the global &FSA::Rules::DESTROY.
FSA::Rules=HASH(0x2e7a198) [refcount 1] is
referenced by REF(0x2e7a768) [refcount 1], which is
      not found anywhere I looked :(
FSA::Rules is dead
[download]

Here is the testing code that I used:

use warnings;
use strict;
use Siebel::Srvrmgr::Daemon::Heavy;
use Cwd;
use File::Spec;
use Scalar::Util qw(weaken);

my $repeat = 3;

my $daemon = Siebel::Srvrmgr::Daemon::Heavy->new(
        {
            gateway     => 'whatever',
            enterprise  => 'whatever',
            user        => 'whatever',
            password    => 'whatever',
            server      => 'whatever',
            bin         => File::Spec->catfile( getcwd(), 'srvrmgr-moc
+k.pl' ),
            use_perl    => 1,
            is_infinite => 0,
            timeout     => 0,
            commands    => [
                Siebel::Srvrmgr::Daemon::Command->new(
                    command => 'list comp',
                    action  => 'Dummy'
                )
            ]
        }
    );

    for ( 1 .. $repeat ) {

        $daemon->run();

    }

syswrite STDOUT,  "End of program\n";
[download]

sub DESTROY { 

        my $self = shift;

        use Devel::FindRef;
        use Scalar::Util qw(weaken);

        syswrite STDOUT, Devel::FindRef::track $self;
        weaken($self);

        delete $machines{+shift}; 

        syswrite STDOUT, Devel::FindRef::track $self;
        syswrite STDOUT, "FSA::Rules is dead\n"
        
        }
[download]

The correct order of messages of termination should be:

1. FSA:Rules
2. ListParser
3. The program itself
4. daemon

The thing is, at each execution of run(), a new FSA::Object is kept in memory unit program termination.

Besides, the message from Devel::FindRef:

+- referenced by REF(0x2e7a768) [refcount 1], which is
|     not found anywhere I looked :(
[download]

leaves me without hope to find what is happening.

There is anything else that I could do to detect where in the code this reference is being kept?