请教Apache/eAccelerator 问题

macson

我的web服务器系统用的是fedora5,
apache是2.2
eAccelerator加速器为0.9.4
php是4.2.2
我在后台观察apache的日志，发现里面会出现下面的错误信息，请问是什么原因造成的，如何解决？
eAccelerator: Could not lock!
eAccelerator: Could not lock!
eAccelerator: Could not release lock!  (这个不明白是什么原因)

[Thu May 04 05:26:20 2006] [error] [client 61.135.146.197] File does not exist:
/opt/www/html/cshop/pages-popup_image
[Thu May 04 05:26:34 2006] [error] [client 61.135.146.197] File does not exist:
/opt/www/html/cshop/pages-productinfo
[Thu May 04 05:37:10 2006] [error] [client 202.108.22.142] File does not exist:
/opt/www/html/cshop/phpbb
[Thu May 04 05:37:28 2006] [error] [client 202.108.22.142] File does not exist:
/opt/www/html/cshop/phpbb
但是这些文件和目录都是存在的！[HTML][HTML][HTML][/HTML][/HTML][/HTML]