Some rooms are erroneously going missing #824

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opened 2025-05-09 21:20:47 +00:00 by nex · 0 comments

nex commented

2025-05-09 21:20:47 +00:00

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Symptoms look like Forgetting room !room:example: Error: 400 {"errcode":"M_UNKNOWN","error":"M_UNKNOWN: No membership event was found, room was never joined"} and Missing state for "!room:example": M_NOT_FOUND: Not found in database

Possibly related to this could be that the rooms I have managed to investigate lack relevant membership events for the given users, even though they're in the /sync[rooms.leave] payload. It looks to me like affected rooms have state reset beyond use (i.e. bricked), however I haven't been able to check many rooms. needs investigation.

While trying to call /forget on some rooms, a few of them reported that the user forgetting the rooms was never in them. Upon further investigation, it looks like the server doesn't know about these rooms at all. It turns out, the `roomid_shortroomid` for the relevant rooms is missing - the state and whatnot appears to still be there. Symptoms look like `Forgetting room !room:example: Error: 400 {"errcode":"M_UNKNOWN","error":"M_UNKNOWN: No membership event was found, room was never joined"}` and `Missing state for "!room:example": M_NOT_FOUND: Not found in database` Possibly related to this could be that the rooms I have managed to investigate lack relevant membership events for the given users, even though they're in the `/sync[rooms.leave]` payload. It looks to me like affected rooms have state reset beyond use (i.e. bricked), however I haven't been able to check many rooms. **needs investigation.**