synapse/changelog.d/7817.bugfix at 55f2617f8ce798da4e8ca0fa351db60dc13ef355 - mirrors/synapse - Sadium Git

mirrors/synapse

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Erik Johnston e29c44340b

Fix recursion error when fetching auth chain over federation (#7817 )

When fetching the state of a room over federation we receive the event
IDs of the state and auth chain. We then fetch those events that we
don't already have.

However, we used a function that recursively fetched any missing auth
events for the fetched events, which can lead to a lot of recursion if
the server is missing most of the auth chain. This work is entirely
pointless because would have queued up the missing events in the auth
chain to be fetched already.

Let's just diable the recursion, since it only gets called from one
place anyway.

2020-07-10 18:15:35 +01:00

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Fix bug where Synapse fails to process an incoming event over federation if the server is missing too much of the event's auth chain.