#22526 [Opn->Fbk]: session_start/popen hang

ID: 22526 Updated by: iliaa@php.net Reported By: iberry at raxnet dot net -Status: Open +Status: Feedback Bug Type: Session related Operating System: Windows 2000 PHP Version: 4.3.0 New Comment: Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip If the problem persists, see if the bug can be replicated using the CLI or CGI sapi. Previous Comments: ------------------------------------------------------------------------ [2003-03-03 17:55:33] iberry at raxnet dot net 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 this bug report at http://bugs.php.net/?id=22526&edit=1