Seeing 503 errors when opening pages from Hoogle or looking up packages on hackage:
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Yeah, it happens to me pretty much every midnight UTC. Goes away on its own in 20 minutes or so.
Hmm, although not quite. I’ve seen 503 errors from Varnish cache server before, but not this one.
Seems to be good now 
We started to get these small outages when we switched hackage boxes and haven’t been able to trace down the cause – it appears to be an error with too many file handles opened periodically, but haven’t sourced down where that comes from – although I suspect, if anyone wants to roll up their sleeves, that it could have to do with inefficient storage/calculation of download counts.
Could it be Out of file descriptors! · Issue #100 · haskell/tar · GitHub / cabal haddock failure: out of FDs due to tar · Issue #11131 · haskell/cabal · GitHub? ?
hackage-server still uses tar-0.6: hackage-server/hackage-server.cabal at 350fd8aac61c76481fcccfeee499ab6675171320 · haskell/hackage-server · GitHub
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that’s a great suggestion and could well be the culprit. thanks for raising that!