问题：apache的mod_cache,mod_dist_cache模块有时候缓存不成功

CODE:

[Thu Sep 28 20:23:59 2006] [error] (111)Connection refused: proxy: HTTP: attempt to connect to 1.1.1.1:80 (www.mydomain.com.cn) failed
[Thu Sep 28 20:23:59 2006] [error] (111)Connection refused: proxy: HTTP: attempt to connect to 1.1.1.1:80 (www.mydomain.com.cn) failed
[Thu Sep 28 20:23:59 2006] [error] (111)Connection refused: proxy: HTTP: attempt to connect to 1.1.1.1:80 (www.mydomain.com.cn) failed

CODE:

####  Add Virtual Host Here ####


<VirtualHost *:80>
    ServerName www.mydomain.com.cn
    ProxyRequests Off
    ProxyPass  / http://www.mydomain.com.cn/
    ProxyPassReverse / http://www.mydomain.com.cn/

<IfModule mod_cache.c>
    CacheDefaultExpire 18000
    CacheMaxExpire  1209600

    CacheIgnoreCacheControl  On
    CacheIgnoreNoLastMod On
    CacheLastModifiedFactor 0.1
#CacheIgnoreHeaders

    <IfModule mod_disk_cache.c>
        CacheEnable disk /
        CacheRoot /var/www/html/cache
        CacheDirLevels 2
        CacheDirLength 1
        CacheMinFileSize 1
        CacheMaxFileSize 1024000000
    </IfModule>

#    <IfModule mod_mem_cache.c>
#        CacheEnable mem /
#        MCacheSize 4096
#        MCacheMaxObjectCount 100
#        MCacheMinObjectSize 1
#        MCacheMaxObjectSize 2048
#    </IfModule>

</Ifmodule>
    CustomLog logs/domain_log combined
    ErrorLog logs/domain_error_log
</VirtualHost>