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Return a non-fatal error to the federation API on a state regression (#1498)

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* Return a non-fatal error to the federation API on a state regression

* Return no error but don't morph state
This commit is contained in:
Neil Alexander 2020-10-08 12:13:50 +01:00 committed by GitHub
parent 3e12f6e9c2
commit 429bd48129
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1 changed files with 6 additions and 3 deletions
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9
roomserver/internal/input/input_latest_events.go
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@ -236,10 +236,13 @@ func (u *latestEventsUpdater) latestState() error {
if len(u.removed) > len(u.added) {
// This really shouldn't happen.
// TODO: What is ultimately the best way to handle this situation?
return fmt.Errorf(
"invalid state delta wants to remove %d state but only add %d state (between state snapshots %d and %d)",
len(u.removed), len(u.added), u.oldStateNID, u.newStateNID,
logrus.Errorf(
"Invalid state delta on event %q wants to remove %d state but only add %d state (between state snapshots %d and %d)",
u.event.EventID(), len(u.removed), len(u.added), u.oldStateNID, u.newStateNID,
)
u.added = u.added[:0]
u.removed = u.removed[:0]
return nil
}
// Also work out the state before the event removes and the event