I don't think you are creating hash array here, instead you are just reading the file content and creating a hash. Moreover use "chomp" whenever you are using file handles.

use strict;
use warnings;
my %href;
my $fn = <>;
open(FH, "$fn") || die "Cannot open file";

while (<FH>) {
        chomp($_);
        $href{$1} = $2 if $_ =~ /(\S+)\s+(\S+)/;
}

while (my ($key, $value) = each(%href)) {
        print $key. ", ". $value."\n";
}
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