“[notice] child pid XXXX退出信号分段错误(11)”在apache error.log中

时间:2011-10-12 19:38:44

标签: php apache cakephp error-logging

我正在使用Apache / PHP / MySQL堆栈 使用CakePHP作为框架。

每隔一段时间我就会得到一张空白页。我无法通过Cake调试它,所以我偷看了apache error.log,这就是我得到的:

[Wed Oct 12 15:27:23 2011] [notice] child pid 3580 exit signal Segmentation fault (11)
[Wed Oct 12 15:27:34 2011] [notice] child pid 3581 exit signal Segmentation fault (11)
[Wed Oct 12 15:30:52 2011] [notice] child pid 3549 exit signal Segmentation fault (11)
[Wed Oct 12 16:04:27 2011] [notice] child pid 3579 exit signal Segmentation fault (11)
zend_mm_heap corrupted
[Wed Oct 12 16:26:24 2011] [notice] child pid 3625 exit signal Segmentation fault (11)
[Wed Oct 12 17:57:24 2011] [notice] child pid 3577 exit signal Segmentation fault (11)
[Wed Oct 12 17:58:54 2011] [notice] child pid 3550 exit signal Segmentation fault (11)
[Wed Oct 12 17:59:52 2011] [notice] child pid 3578 exit signal Segmentation fault (11)
[Wed Oct 12 18:01:38 2011] [notice] child pid 3683 exit signal Segmentation fault (11)
[Wed Oct 12 22:20:53 2011] [notice] child pid 3778 exit signal Segmentation fault (11)
[Wed Oct 12 22:29:51 2011] [notice] child pid 3777 exit signal Segmentation fault (11)
[Wed Oct 12 22:33:42 2011] [notice] child pid 3774 exit signal Segmentation fault (11)

这个分段错误是什么,我该如何解决?

更新:

PHP Version 5.3.4, OSX local development
Server version: Apache/2.2.17 (Unix)
CakePhp: 1.3.10

3 个答案:

答案 0 :(得分:63)

将gdb附加到其中一个httpd子进程并重新加载或继续工作并等待崩溃,然后查看回溯。做这样的事情:

$ ps -ef|grep httpd
0     681     1   0 10:38pm ??         0:00.45 /Applications/MAMP/Library/bin/httpd -k start
501   690   681   0 10:38pm ??         0:00.02 /Applications/MAMP/Library/bin/httpd -k start

...

现在将gdb附加到其中一个子进程,在本例中为PID 690(列为UID,PID,PPID,...)

$ sudo gdb
(gdb) attach 690
Attaching to process 690.
Reading symbols for shared libraries . done
Reading symbols for shared libraries ....................... done
0x9568ce29 in accept$NOCANCEL$UNIX2003 ()
(gdb) c
Continuing.

等待崩溃......然后:

(gdb) backtrace

或者

(gdb) backtrace full

应该给你一些线索。如果您提交错误报告,则应包括回溯。

如果崩溃难以重现,那么将Apache配置为仅使用一个子进程来处理请求可能是个好主意。配置是这样的:

StartServers 1
MinSpareServers 1
MaxSpareServers 1

答案 1 :(得分:20)

分段错误是php中的内部错误(或者,不太可能是apache)。通常,分段错误是由较新的和较少测试的php模块之一引起的,例如imagemagick或subversion。

尝试禁用所有非必要模块(在php.ini中),然后逐个重新启用它们,直到发生错误。您可能还想更新php和apache。

如果这没有用,你应该report a php bug

答案 2 :(得分:16)

您是否尝试在php.ini中增加output_buffering?

What does "zend_mm_heap corrupted" mean