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Return ErrRoomNoExists if insufficient state is available for a buildEvent to succeed when joining a room (#2210)

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This may help cases like #2206, since it should prompt us to try a federated join again instead.
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Neil Alexander 2022-02-21 16:22:29 +00:00 • committed by GitHub
parent cf525d1f61
commit aa6bbf484a
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4 changed files with 18 additions and 3 deletions
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11
roomserver/internal/perform/perform_join.go
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@ -29,6 +29,7 @@ import (
"github.com/matrix-org/dendrite/roomserver/internal/input"
"github.com/matrix-org/dendrite/roomserver/internal/query"
"github.com/matrix-org/dendrite/roomserver/storage"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/dendrite/setup/config"
"github.com/matrix-org/gomatrixserverlib"
"github.com/sirupsen/logrus"
@ -367,7 +368,15 @@ func buildEvent(
StateToFetch: eventsNeeded.Tuples(),
}, &queryRes)
if err != nil {
return nil, nil, fmt.Errorf("QueryLatestEventsAndState: %w", err)
switch err.(type) {
case types.MissingStateError:
// We know something about the room but the state seems to be
// insufficient to actually build a new event, so in effect we
// had might as well treat the room as if it doesn't exist.
return nil, nil, eventutil.ErrRoomNoExists
default:
return nil, nil, fmt.Errorf("QueryLatestEventsAndState: %w", err)
}
}
ev, err := eventutil.BuildEvent(ctx, builder, cfg, time.Now(), &eventsNeeded, &queryRes)