Perl script hangs for no reason - windows

Question

So I have this small script which checks two log files for a specific line and compares the lines.
The script is used on several different Windows Bamboo Agents. But on one it just hangs and doesn't exit. Since the script is used in bamboo the whole job hangs, when this script doesn't exit.
When I check the computer via remote access and kill the script the job continues until it reaches the script again.
This is the script, which is started by another script.
#! /usr/bin/perl
my $naluresult = 2;
my $hevcresult = 2;
my $hevcfailed = 0;
use strict;
use warnings;
#---------------------------------------------
#check for $ARGV[0] and $ARGV[1]
open( my $nalulog, "<", $ARGV[1] )
or die "cannot open File:$!\n\n";
while (<$nalulog>) {
chomp;
$_ =~ s/\s+//g;
if ( $_ =~ m/MD5:OK/ ) {
$naluresult = 1;
} else {
if ( $_ =~ m/MD5:MISSING/ ) {
$naluresult = 0;
}
}
}
close $nalulog;
#---------------------------------------------
open( my $hevclog, "<", $ARGV[0] )
or die "cannot open File:$!\n\n";
while (<$hevclog>) {
chomp;
$_ =~ s/\s+//g;
if ( $_ =~ m/MD5check:OK/ ) {
$hevcresult = 1;
last;
} else {
if ( $_ =~ m/MD5check:FAILED/ ) { $hevcfailed = 1; }
}
if ( $hevcfailed == 1 ) {
#do stuff
}
}
close $hevclog;
#---------------------------------------------
if ( $hevcresult == 2 ) {
print("Missing MD5 status in HEVC Output");
exit(-1);
} elsif ( $naluresult == 2 ) {
print("Missing MD5 status in NALU Output");
exit(-2);
} else {
if ( $naluresult == $hevcresult ) { exit(0); }
else {
#different if-statements to print() to log
exit(1);
}
}
#---------------------EOF---------------------

Answer 1

If your files are just normal disk files that aren't being simultaneously written to by other processes, or locked, or anything like that, then there is nothing in the code you have here that should hang. If the files are both reasonable sizes, the code you have here should read through the files and finish.
However, if one of the files is locked, or is immensely large, or if you have other code that can get stuck in an infinite loop, that would explain why your program is hanging.