Bug #74900 [Opn->Fbk]: Random file not found on multiple processes

From: Date: Mon, 24 Jul 2017 16:41:14 +0000
Subject: Bug #74900 [Opn->Fbk]: Random file not found on multiple processes
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=74900&edit=1

 ID:                 74900
 Updated by:         ab@php.net
 Reported by:        falk dot aaron85 at gmail dot com
 Summary:            Random file not found on multiple processes
-Status:             Open
+Status:             Feedback
 Type:               Bug
 Package:            *Directory/Filesystem functions
 Operating System:   Windows Server 2012 R2
 PHP Version:        Irrelevant
 Block user comment: N
 Private report:     N

 New Comment:

Some questions yet

- do you run php as an elevated user?
- do you create symlinks with php, or if not - what is the exact mklink or junction command line?
- what are the ACLs on the symlink and on the file (use icacls)?


Thanks.


Previous Comments:
------------------------------------------------------------------------
[2017-07-14 13:50:52] falk dot aaron85 at gmail dot com

I found out that this problem does only occurs if in the path of the file to read is a symbolic link
(/D or /J) inside.

Without symbolic links, I am not able to reproduce the issue.
Could you please try it with the use of symbolic link(s) in the path of the file to read?

------------------------------------------------------------------------
[2017-07-12 16:57:22] falk dot aaron85 at gmail dot com

Tried it with 7.0.14RC1 on Windows 10 and cannot reproduce it.

------------------------------------------------------------------------
[2017-07-12 16:52:52] ab@php.net

Ok, lets see. Perhaps someone else has better luck reproducing this of finding a better reproducer.

Thanks.

------------------------------------------------------------------------
[2017-07-12 16:41:05] falk dot aaron85 at gmail dot com

I tried it on 3 different windows machines with php 5.5, 5.6, 7.0 and 7.1. It can reproduce it on
all systems with all php versions.

Randomly the file_get_contents gets the error failes to open stream: no such file or directory...

------------------------------------------------------------------------
[2017-07-12 16:21:44] ab@php.net

Still no luck. I've changed your code to a bit shorter version

<?php
ini_set('display_errors', 1);
error_reporting( E_ALL );
$path = 'C:\path\to\file';
for ($i = 0; $i < 100; $i++) {
        if (!file_exists($path)) {
                die("Doesn't exist");
        }
        if (!file_get_contents($path)) {
                die("No content");
        }
}

echo "all clean";

and used up to 32 processes, but all i get is "all clean" outputs. You told you've
used other PHP versions, have you tried latest versions or just some? Also, does this reproduce on
another machine?

Thanks.

------------------------------------------------------------------------


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