Edit report at https://bugs.php.net/bug.php?id=44994&edit=1
ID: 44994
Comment by: jaw at condidact dot dk
Reported by: dbarrett at vistaprint dot com
Summary: exec() produces zombie processes on Windows, hangs
Apache
Status: Closed
Type: Bug
Package: Program Execution
Operating System: win32 only - 2003 Server, 64-bit
PHP Version: 5.2.6
Assigned To: pajoye
Block user comment: N
Private report: N
New Comment:
I have also experienced this problem on debian linux kernel 2.6.22.6-1-amd64 /
php 5.3.8 / apache 2.2.11
It seems like the problem stems from php running multiple similar/same commands.
The session_write_close() fix did nothing for me, but a sleep(2) (2 might be
relative to the execution time of the command, in my case a ping with a timeout
of 1) after exec(), seems to alleviate the problem, but not completely solving
it.
Hope that helps somebody
Previous Comments:
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[2012-06-06 01:31:36] mark at clevertech dot biz
WinXP Home SP3
XAMPP with:
PHP 5.3.8 built Aug 23, 2011
Apache 2.2.21 built Sep 10, 2011
This problem occurs with proc_open(), exec(), and popen().
Once a child process hangs, PHP in new page requests continues to run fine
unless I call proc_open(), exec(), popen(), or session_start().
The problem ceases to occur when I call session_write_close() before my call to
proc_open(), exec(), or popen().
I'm on a team of 6 developers, and we are running this on Linux, Mac, and
several versions of Windows, but we've only seen this problem on Windows XP.
This is happening on a complex application using a large framework. I intend to
post a straightforward test script later.
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[2011-10-10 17:08:57] [email protected]
@jameslively at insightbb dot com
What do you see exactly? Can you provide a small script and the cmd you use to
test?
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[2011-10-10 15:31:25] jameslively at insightbb dot com
I am still seeing this issue on PHP 5.3.8. I am running the site on Windows
2k3 sp3 and Apache 2.2.
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[2011-05-05 18:09:25] [email protected]
Fixed in 5.3.x
------------------------------------------------------------------------
[2011-05-05 17:52:08] php at mmtbb dot com
Testing on PHP v5.3.1 (installed with XAMPP), I'm able to run 50 concurrent
popen requests without any fault. All processes terminate after completion.
I understand that the popen() and exec() were both experiencing this issue in
the past, the 5.3.x line seems to resolve the issue.
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