From: iberry at raxnet dot net
Operating system: Windows 2000
PHP version: 4.3.0
PHP Bug Type: Session related
Bug description: session_start/popen hang
I think I have found some sort of race-like condition using session_start()
and popen() functions, causing the web server to hang. The bug only seems
to manifest when repeatedly initiating a page that requires
session_start() and uses popen(). This is relevant for me because this
page renders graphs and needs both of these functions to perform its job.
Here is some example code to re-produce the problem:
----test.php----
<img src="img.php?rra_id=1">
<img src="img.php?rra_id=2">
<img src="img.php?rra_id=3">
<img src="img.php?rra_id=4">
----end----
----img.php----
<?php
session_start();
$fp = popen('test', "r");
print fpassthru($fp);
pclose($fp);
?>
----end----
Notice how I am passing different GET variables to each image page
session, this seems to be necessary for the bug to manifest. This code has
been tested on both IIS 5 and Apache 2.0.44 with the same results
The path I give popen() does not appear to make a difference. I have also
have tried the popen 'r' and 'rb' file modes, which made no difference.
The two triggers of this bug appear to be the combined use of
session_start()/popen() and the varying GET variable values.
Thanks for taking time to look into this.
-Ian
--
Edit bug report at http://bugs.php.net/?id=22526&edit=1
--
Try a CVS snapshot: http://bugs.php.net/fix.php?id=22526&r=trysnapshot
Fixed in CVS: http://bugs.php.net/fix.php?id=22526&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=22526&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=22526&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=22526&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=22526&r=support
Expected behavior: http://bugs.php.net/fix.php?id=22526&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=22526&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=22526&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=22526&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=22526&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=22526&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=22526&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=22526&r=gnused
