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<p class="MsoNormal">Hi Guys, please observe the following...<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">wget -S http://blah.com/j%2FoRjj0RRdJu3IWYoBIbgtIiI%2FoV%2Fvtl%2BxzcX1Km0OCZbxBDJDtqb8afEWpOaizmrTv9MWUPyjqNlFbVyezfJaP%2FzIv0M5yFt0IrKWjMTW1x5r1RHLObU2ylE3EhjZssc19qxfAer6RL7W7HhjwBZBSNfCO7c6JW1ElNGiSfXuY%3D/WoW-3.0.1-to-3.0.2-Update.zip<o:p></o:p></p>
<p class="MsoNormal">--2011-04-11 20:39:20-- http://blah.com/j%2FoRjj0RRdJu3IWYoBIbgtIiI%2FoV%2Fvtl%2BxzcX1Km0OCZbxBDJDtqb8afEWpOaizmrTv9MWUPyjqNlFbVyezfJaP%2FzIv0M5yFt0IrKWjMTW1x5r1RHLObU2ylE3EhjZssc19qxfAer6RL7W7HhjwBZBSNfCO7c6JW1ElNGiSfXuY%3D/WoW-3.0.1-to-3.0.2-Update.zip<o:p></o:p></p>
<p class="MsoNormal">Resolving blah.com... 83.x.x.x<o:p></o:p></p>
<p class="MsoNormal">Connecting to blah.com|83.x.x.x|:80... connected.<o:p></o:p></p>
<p class="MsoNormal">HTTP request sent, awaiting response...<o:p></o:p></p>
<p class="MsoNormal"> HTTP/1.1 200 OK<o:p></o:p></p>
<p class="MsoNormal"> Date: Mon, 11 Apr 2011 19:28:08 GMT<o:p></o:p></p>
<p class="MsoNormal"> Content-Type: application/zip<o:p></o:p></p>
<p class="MsoNormal"> Connection: keep-alive<o:p></o:p></p>
<p class="MsoNormal"> Content-Length: 408013880<o:p></o:p></p>
<p class="MsoNormal"> Last-Modified: Wed, 15 Oct 2008 00:38:52 GMT<o:p></o:p></p>
<p class="MsoNormal"> Content-Disposition: attachment; filename="WoW-3.0.1-to-3.0.2-Update.zip"<o:p></o:p></p>
<p class="MsoNormal"> X-Cached-New-L2: 98.x.x.x:80 <b>(origin server)</b><o:p></o:p></p>
<p class="MsoNormal"> X-Cached-L2: MISS<o:p></o:p></p>
<p class="MsoNormal"> X-Cached-L1: HIT<o:p></o:p></p>
<p class="MsoNormal"> X-Content-Length: 408013880<o:p></o:p></p>
<p class="MsoNormal"> Accept-Ranges: bytes<o:p></o:p></p>
<p class="MsoNormal"> X-Limited-After: 0<o:p></o:p></p>
<p class="MsoNormal"> X-Limited: 512000<o:p></o:p></p>
<p class="MsoNormal">Length: 408013880 (389M) [application/zip]<o:p></o:p></p>
<p class="MsoNormal">Saving to: `WoW-3.0.1-to-3.0.2-Update.zip.4'<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">4% [> ] 19,455,578 --.-K/s in 1m 44s
<b>(it stalls here then times out)</b><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">2011-04-11 20:41:04 (184 KB/s) - Connection closed at byte 19455578. Retrying.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">--2011-04-11 20:41:05-- (try: 2) http://blah.com/j%2FoRjj0RRdJu3IWYoBIbgtIiI%2FoV%2Fvtl%2BxzcX1Km0OCZbxBDJDtqb8afEWpOaizmrTv9MWUPyjqNlFbVyezfJaP%2FzIv0M5yFt0IrKWjMTW1x5r1RHLObU2ylE3EhjZssc19qxfAer6RL7W7HhjwBZBSNfCO7c6JW1ElNGiSfXuY%3D/WoW-3.0.1-to-3.0.2-Update.zip<o:p></o:p></p>
<p class="MsoNormal">Connecting to blah.com|83.x.x.x|:80... connected.<o:p></o:p></p>
<p class="MsoNormal">HTTP request sent, awaiting response...<o:p></o:p></p>
<p class="MsoNormal"><b> HTTP/1.1 502 Bad Gateway<o:p></o:p></b></p>
<p class="MsoNormal"> Date: Mon, 11 Apr 2011 19:29:53 GMT<o:p></o:p></p>
<p class="MsoNormal"> Content-Type: text/html<o:p></o:p></p>
<p class="MsoNormal"> Connection: keep-alive<o:p></o:p></p>
<p class="MsoNormal"> Content-Length: 177<o:p></o:p></p>
<p class="MsoNormal">2011-04-11 20:41:05 ERROR 502: Bad Gateway.<o:p></o:p></p>
<p class="MsoNormal"><b>(some browsers/downloaders seem to retry many times per second when they get a 502... very annoying!)<o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This behaviour is always repeatable on this file (but only happens in very rare circumstances).<o:p></o:p></p>
<p class="MsoNormal">It seems as if nginx hasn’t got the fully cached file yet reports the full content-length.<o:p></o:p></p>
<p class="MsoNormal">If I use cache_purge to wipe the file and request again the issue is resolved and it gets the full file from the origin<o:p></o:p></p>
<p class="MsoNormal">What could be the cause/solution?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks as always<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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