On Sun, Jul 1, 2012 at 4:12 PM, Mick <michaelkintz...@gmail.com> wrote: > On Sunday 01 Jul 2012 20:34:23 Jarry wrote: >> On 01-Jul-12 21:20, Philip Webb wrote: >> > I now have an explicit example of a server doing this : >> > 503: hold> wget --no-check-certificate -c >> > http://www.math.wisc.edu/~keisler/keislercalc-2-12.pdf --2012-07-01 >> > 15:07:18-- http://www.math.wisc.edu/~keisler/keislercalc-2-12.pdf >> > Resolving www.math.wisc.edu... 144.92.166.196 >> > Connecting to www.math.wisc.edu|144.92.166.196|:80... connected. >> > HTTP request sent, awaiting response... 302 Found >> > Location: >> > https://www.math.wisc.edu/formMail/throttle.php?URL=/~keisler/keisler >> > calc-2-12.pdf [following] --2012-07-01 15:07:18-- >> > https://www.math.wisc.edu/formMail/throttle.php?URL=/~keisler/keisler >> > calc-2-12.pdf Connecting to www.math.wisc.edu|144.92.166.196|:443... >> > connected. WARNING: The certificate of `www.math.wisc.edu' is not >> > trusted. WARNING: The certificate of `www.math.wisc.edu' hasn't got a >> > known issuer. HTTP request sent, awaiting response... 200 OK >> > Length: 24184097 (23M) [application/pdf] >> > Saving to: `keislercalc-2-12.pdf' >> > >> > 6% [==========> ] 1,638,400 64.5K/s eta 38m 5s >> >> Everything OK here: >> >> obelix ~ # wget --no-check-certificate -c >> http://www.math.wisc.edu/~keisler/keislercalc-2-12.pdf >> --2012-07-01 19:35:14-- >> http://www.math.wisc.edu/~keisler/keislercalc-2-12.pdf >> Resolving www.math.wisc.edu... 144.92.166.196 >> Connecting to www.math.wisc.edu|144.92.166.196|:80... connected. >> HTTP request sent, awaiting response... 302 Found >> Location: >> https://www.math.wisc.edu/formMail/throttle.php?URL=/~keisler/keislercalc-2 >> -12.pdf [following] >> --2012-07-01 19:35:14-- >> https://www.math.wisc.edu/formMail/throttle.php?URL=/~keisler/keislercalc-2 >> -12.pdf Connecting to www.math.wisc.edu|144.92.166.196|:443... connected. >> HTTP request sent, awaiting response... 200 OK >> Length: 24184097 (23M) [application/pdf] >> Saving to: `keislercalc-2-12.pdf' >> >> 100%[======================================>] 24,184,097 6.88M/s in 4.4s >> >> 2012-07-01 19:35:19 (5.25 MB/s) - `keislercalc-2-12.pdf' saved >> [24184097/24184097] >> >> Jarry > > Everything OK here too maxing out my ADSL connection (I'm envious of Jarry's > fibre! :p ) > > $ wget --no-check-certificate -c > http://www.math.wisc.edu/~keisler/keislercalc-2-12.pdf > --2012-07-01 20:54:06-- > http://www.math.wisc.edu/~keisler/keislercalc-2-12.pdf > Resolving www.math.wisc.edu... 144.92.166.196 > Connecting to www.math.wisc.edu|144.92.166.196|:80... connected. > HTTP request sent, awaiting response... 302 Found > Location: > https://www.math.wisc.edu/formMail/throttle.php?URL=/~keisler/keislercalc-2-12.pdf > [following] > --2012-07-01 20:54:07-- > https://www.math.wisc.edu/formMail/throttle.php?URL=/~keisler/keislercalc-2-12.pdf > Connecting to www.math.wisc.edu|144.92.166.196|:443... connected. > HTTP request sent, awaiting response... 200 OK > Length: 24184097 (23M) [application/pdf] > Saving to: `keislercalc-2-12.pdf' > > 100%[======================================>] 24,184,097 821K/s in 38s > > 2012-07-01 20:54:46 (619 KB/s) - `keislercalc-2-12.pdf' saved > [24184097/24184097] > > > This pretty good given that I am connecting all the way from ol' Blighty and > there is some latency and potentially dropped packets: > > # mtr -c 3 -s 955 -u -l -r wisc.edu > HOST: dell_xps Loss% Snt Last Avg Best Wrst StDev > 1.|-- router 0.0% 3 4.0 3.9 3.9 4.0 0.0 > 2.|-- b.gormless.thn.aa.net.uk 0.0% 3 43.5 44.9 43.5 46.1 1.3 > 3.|-- a.aimless.thn.aa.net.uk 0.0% 3 45.6 45.0 43.1 46.3 1.7 > 4.|-- 10gigabitethernet1-1.core 0.0% 3 47.7 58.2 45.1 81.9 20.5 > 5.|-- 10gigabitethernet7-4.core 0.0% 3 112.5 112.9 112.5 113.7 0.7 > 6.|-- 10gigabitethernet8-3.core 0.0% 3 131.9 136.3 131.9 139.8 4.0 > 7.|-- ??? 100.0 3 0.0 0.0 0.0 0.0 0.0 > 8.|-- r-uwmadison-isp-xe-8-0-1- 0.0% 3 165.7 166.8 161.1 173.6 6.3 > | `|-- 140.189.8.1 > 9.|-- r-peer-xe-1-1-0-945.net.w 0.0% 3 160.0 161.0 160.0 161.9 1.0 > 10.|-- r-cssc-b280c-9-core-vlan- 0.0% 3 161.9 160.4 159.5 161.9 1.3 > | `|-- 146.151.167.85 > 11.|-- r-csscplat-b380-1-node-vl 0.0% 3 159.9 160.4 159.6 161.7 1.2 > 12.|-- ??? 100.0 3 0.0 0.0 0.0 0.0 0.0 > > > If as I recall you said this happens at all times and it is not related to > Internet congestion, then all I can suggest is to try using a different ISP's > network and see if you are getting similar problems.
It could be a connection duration limit. Either the web server or an intermediate proxy server may place a limit on how long a connection may be open. If you have a low-bandwidth pipe, you'd be more vulnerable to hitting that limit than someone with a high-bandwidth pipe. Possible sources off the top of my head: PHP scripts' script time limits. squid connection time limits. Try launching two simultaneous wget processes, and see if they both fail out around the same time. -- :wq
