Greetings! We use squid as a forward proxy for our project.Recently we found that one of the instance rebuilding a lot of times. And we check the configure found all the instance use the same. But just this instance always rebuilding( about 3 ~ 4 times per day) And we found the cache log has some thing below. 2013/01/29 09:56:40 kid1| ctx: enter level 0: 'http://bo.ok168.com/music/<CD><F4><CB><D5><E3><F1>/<BA><C3><B0><B2><BE><B2>.wma' 2013/01/29 09:56:40 kid1| WARNING: unparseable HTTP header field {<h1><body bgcolor="red">Bad Request (Invalid Hostname)</body></h1>} #this is when i shutdown the instance. 2013/01/29 10:03:38 kid1| Preparing for shutdown after 9796891 requests 2013/01/29 10:03:38 kid1| Waiting 30 seconds for active connections to finish 2013/01/29 10:03:38 kid1| Closing HTTP port 192.168.134.16:3128 2013/01/29 10:03:38 kid1| Closing SNMP receiving port 192.168.134.16:3401 2013/01/29 10:03:38 kid1| Shutdown: NTLM authentication. 2013/01/29 10:03:38 kid1| Shutdown: Negotiate authentication. 2013/01/29 10:03:38 kid1| Shutdown: Digest authentication. 2013/01/29 10:03:38 kid1| Shutdown: Basic authentication. 2013/01/29 10:03:38 kid1| assertion failed: errorpage.cc:608: "entry->isEmpty()"