我正在维护的网站不时会对某些资源发出GET请求失败.状态返回为(失败),类型为Pending.标题只包含请求本身,没有任何响应.
服务器正在运行Drupal和Varnish.
有关导致失败的原因或从何处开始调试的任何想法?

这可能与Chrome遇到"Status =(failed)"和"Type = undefined"时遇到的网络错误类型有关,即使该类型返回不同的消息.有人可能会证实这一点吗?如果是这样,我该怎么调试呢?
提前致谢
编辑,我刚安装wireshark尝试调试更多.
这是失败请求的完整后续操作

转储94645,94651,94686和94688
No. Time Source Destination Protocol Length Info
94645 211.219995 192.168.0.101 85.134.37.196 HTTP 1192 [TCP Retransmission] GET /sites/default/files/css/css_4PXz_aZSHtm7FWHqYsMdm7sl9C4802BFn9tXlePfpJU.css HTTP/1.1
Frame 94645: 1192 bytes on wire (9536 bits), 1192 bytes captured (9536 bits)
Arrival Time: Nov 7, 2012 22:55:18.002267000 EET
Epoch Time: 1352321718.002267000 seconds
[Time delta from previous captured frame: 0.006199000 seconds]
[Time delta from previous displayed frame: 0.815800000 seconds]
[Time since reference or first frame: 211.219995000 seconds]
Frame …Run Code Online (Sandbox Code Playgroud)