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

ID: 22526 User updated by: iberry at raxnet dot net Reported By: iberry at raxnet dot net -Status: Feedback +Status: Open Bug Type: Session related Operating System: Windows 2000 PHP Version: 4.3.0 New Comment: I tried the latest CVS version with the same negative results. I then tried to duplicate the bug using the CGI/CLI binary with no luck (could not produce the sufficent code). After this however, I switched Apache from SAPI to CGI and the problem went away. So for now, we can assume that the problem is related to PHP's SAPI support. Were you able to reproduce this under a SAPI environment? -Ian Previous Comments: ------------------------------------------------------------------------ [2003-03-04 10:29:31] iliaa@php.net 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. ------------------------------------------------------------------------ [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