log的配置如下：
logging {
channel "query_log" {
file "/var/named/query.log" versions 3 size 2m;
severity info;
print-time yes;
print-category yes;
};

channel "bind_log" {
file "/var/named/bind.log" versions 3 size 2m;
severity info;
print-time yes;
print-severity yes;
print-category yes;
};

category queries { "query_log"; };
category default { "bind_log"; };
};

用了两台机子做测试，一台机子上开始的时候出现：
isc_log_open '/var/named/bind.log' failed: permission denied　错误，修改bing.log权限后可以添加日志。可是别外一台机子上，修改文件权限、关闭SElinux、修改文件所属却死活不行。
请问高手还有什么原因？