Erik Johnston a0cd8ae8cb
Don't try and backfill the same room in parallel. (#10116)
If backfilling is slow then the client may time out and retry, causing
Synapse to start a new `/backfill` before the existing backfill has
finished, duplicating work.
2021-06-04 10:47:58 +01:00
..
2021-04-22 16:43:50 +01:00
2021-06-02 15:48:17 +01:00