On Sat, Oct 25, 2008 at 8:54 AM, Henrik Nordstrom <henrik@xxxxxxxxxxxxxxxxxxx> wrote: > On fre, 2008-10-24 at 15:44 -0700, Neil Harkins wrote: >> We are using collapsed_forwarding here. I haven't tried disabling it yet. >> >> Unfortunately, since the problem appears to be load-related, I've been >> unable to reproduce for a tcpdump or running squid in debug thus far. > > The mismatch in HIT/MISS is most likely related to collapsed forwarding. > Collapsed requests gets somewhere inbetween an hit or miss, and may well > be reported a little inconsistent. > > Have no idea on the timeout issue unless there is a communication issue > between Squid and your web server. The timeout is because the Content-Length header is bigger than the payload it sent. Every http client/server will hang in that situation. This isn't simply a misreported HIT<->MISS in the log, this is absolutely a significant bug where collapsed forwarding is mixing up the metadata from the two branches of our Vary: Accept-Encoding (gzip and not), i.e. giving the headers and content as non-gzip, but the amount of payload it reads from the cache and sends is based on the gzip size. Disabling collapsed_forwarding fixed it. -neil
