Thursday, 2019-09-26

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zaitcevGuys, especially mattoliverau, do you remember how there was someone (maybe in the channel), who enabled sharding and then this generated some absurd amount of HTTP headers that overflowed something in the proxy?01:57
mattoliverauyup01:57
zaitcevLike, in some situation, every range is a separate header, so you can have 10,000 of them.01:57
mattoliverauWe have 2 patches up to hopefully resolve it01:58
zaitcevAh, okay. Sorry for the noise.01:58
mattoliverauit wasn't each range but I think it was each CleaveContext. .which should be 1 per container.01:58
mattoliverauThe problem was an error limited node so new empty containers were placed on handoffs. And then they'd try and shard.. creating a cleavecontext.01:59
mattoliverauThere is one patch to skip over empty shards (so we can get through these hand off nodes) so they don't could to shard batch size: p 67582002:00
patchbothttps://review.opendev.org/#/c/675820/ - swift - sharder: Keep cleaving on empty shard ranges - 4 patch sets02:00
mattoliverauAnd another which has already been +Aed to clean out old cleave contexts02:01
mattoliveraup 683760 and p 68197002:01
patchbothttps://review.opendev.org/#/c/683760/ - swift - Sharding: Use the metadata timestamp as last_modified (MERGED) - 4 patch sets02:01
patchbothttps://review.opendev.org/#/c/681970/ - swift - Sharding: Clean up old CleaveConext's during audit (MERGED) - 2 patch sets02:02
zaitcevI'm reading just that.02:02
mattoliverauthe first being a cleanup of the latter.02:02
mattoliverauHopefully combined they will help people who have already hit the problem and stop it from happening (I hope) :P02:03
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openstackgerritTim Burke proposed openstack/swift master: Fix some request-smuggling vectors on py3  https://review.opendev.org/68404116:28
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openstackgerritTim Burke proposed openstack/swift master: sharder: Keep cleaving on empty shard ranges  https://review.opendev.org/67582023:20
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mattoliveraumorning23:42

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