For "reasons", I'm loading a few Plack apps under mod_perl via Plack::Handler::Apache2. During a recent tidy up, I've been moving from one vhost entry per app, to a single vhost entry that uses Plack::App::URLMap, and adding an explicit load of all app modules pre-fork.

Loader app look like this

# find all modules in the apps' directories, and load them via Module:
+:Load (so they are in mod_perl parent)

# create URL mappings of the apps
# %app_modules has app names as keys, and app namespaces as lavues
APP: foreach my $app_name (keys %$app_modules) {
    my $uri_path = "/$app_name";
    my $app_namespace = $app_modules->{$app_name};

    $urlmap->mount( $uri_path => ${app_namespace}->to_app );
}
$urlmap->to_app;
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For two example Dancer apps like this, it works as expected:

package App1;
use Dancer2;

our $VERSION = '0.1';

get '/' => sub {
    return "THIS IS ROOT IN APP 1";
};

true;
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That app does not appear to load. I see no error thrown.

however, if I change the line to My::App->import('exported_method'); it works as expected.

I've been scratching my head over this for a few days now, and wondered if anyone has hit anything like this before, or has any pointers on where I should be digging to work this one out.

It looks like things start behaving if I remove the Module::Load code and don't preload everything (but loading the app this way doesn't preload all the app's dependancies).