Why my filehandle $fh2 not prints its statement using Perl?

<<pre>my $map_file="/home/rpsa/DEMO/mapfile.txt";
open( my $fh,  '<', $map_file )            or die( $! );
open( my $fh1, '>', "result_file.txt" ) or die( $! );

while ( my $line = <$fh> ) {
    next unless ( defined( $line ) && $line );
    my @cols = split( /:/, $line );
    print $fh1 $cols[-1], "\n";
}

if(open( my $fh2, '<', "result_file.txt" ) || die( $! ))
{
while ( my $row = <$fh2> ) {
	chomp $row;
	print "****$row****";
}
}
else
{
warn "could not open the file ";
}