Edit report at http://bugs.php.net/bug.php?id=53333&edit=1
ID: 53333
Comment by: kriscr...@php.net
Reported by: paj...@php.net
Summary: Random crash
Status: Feedback
Type: Bug
Package: MySQLi related
Operating System: *
PHP Version: 5.3.3
Assigned To: mysql
Block user comment: N
Private report: N
New Comment:
Hi Ulf,
I've been running the tests for Pierre and am also the one who first
discovered this bug. He asked me to connect with you here because I've
been unable to get the debug directive you mentioned to output.
Specifically, I'm running the PHP 5.3.4RC1 ZTS Pierre released, VC9
compile, on Apache 2.2 under one of our Windows 2008 R2 hosts with
Windbg attached to the process. In php.ini, I added the following line
to the MYSQLND section:
mysqlnd.debug="d:t:O,C:\temp\mysqlnd_debug.log"
The setting does show up in PHPInfo(). Specifically:
mysqlnd
mysqlnd enabled
Version mysqlnd 5.0.7-dev - 091210 - $Revision: 304625 $
Compression supported
SSL not supported
Command buffer size 4096
Read buffer size 32768
Read timeout 31536000
Collecting statistics Yes
Collecting memory statistics Yes
Tracing d:t:O,C:\temp\mysqlnd_debug.log
However, the mysqlnd_debug.log file is never created. I'm not sure
under what conditions it's supposed to output, but in this test I was
hitting both MediaWiki and WordPress until the crash occured, and at no
point was the file created. The directory has full perms (including
write) granted to all users. I could theoretically use procmon to see
if it's attempting to write the file, but since we're dealing with a bug
that takes about an hour to repro, that wouldn't be my first choice.
Have you had a chance yet to test this new debug feature? Do you know
if there are any other settings/etc that need to be enabled in order for
this to work? Please let me know and I'll give it another go.
Thanks!
--Kris
Previous Comments:
------------------------------------------------------------------------
[2010-11-30 12:26:20] paj...@php.net
I will ask to enable it and run again the tests. Thanks :)
------------------------------------------------------------------------
[2010-11-30 12:24:45] u...@php.net
Hi Pierre,
can you provide a mysqlnd debug log, do you have access to the php.ini?
In 5.3.4 mysqlnd learned to write proper debug logs on Windows. Try
running PHP with mysqlnd.debug="d:t:O,C:\mysqlnd_debug.log". You need
5.3.4. 5.3.3 won't do it.
Thanks,
Ulf
------------------------------------------------------------------------
[2010-11-29 14:12:14] paj...@php.net
Yes, it happens as well with current SVN (5.3.4RC1 too).
------------------------------------------------------------------------
[2010-11-29 14:11:19] paj...@php.net
As I said it is not possible yet to get an isolated case. I would have
done it already if yes.
However, anyone able to do a post mortem analysis could see where and
maybe why the crash occurs. memory dumb available if you have such
developer (or someone willing to try, not too hard :).
------------------------------------------------------------------------
[2010-11-29 14:09:13] u...@php.net
Pierre,
of course, we'd love to see an isolated phpt test case. As you state, it
is not necessarily a mysqli issue but may have some other cause.
I agree that Andrey should look at the back trace.
Can this reproduced with 5.3.4? If so, please check if you can give us a
mysqlnd debug log. It is going to be *very* long. As a first step,
please provide us with no more than the last 1000 lines from that log.
1000 lines is a a bit of a random pick to limit the expected long debug
log.
In 5.3.4 mysqlnd learned to write proper debug logs on Windows. Try
running PHP with mysqlnd.debug="d:t:O,C:\mysqlnd_debug.log". You need
5.3.4. 5.3.3 won't do it.
Andrey,
can you have a look at the backtrace?
Thanks,
Ulf
------------------------------------------------------------------------
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