Bugs with large numbers of linked branches time out

Bug #1429358 reported by Colin Watson on 2015-03-07
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Launchpad itself

Bug Description

https://launchpad.net/ubuntu/+source/afflib/+bug/230350 ("Missing Debian Maintainer field") has a ridiculous number of linked branches due to having been used for a very generic bug affecting many packages which was then picked up by package-import. https://oops.canonical.com/oops/?oopsid=OOPS-381fea673f6954d8b31a2067fe65b94a shows 718 Branch queries and 84 BranchMergeProposal queries, so should be a textbook application of preloading.

William Grant (wgrant) wrote :

It's not strictly the large number of linked branches, but rather the high stacking depth of each of them causing deep recursion in Branch.visibleByUser.

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