anonymousland-synapse/synapse/replication/tcp
Erik Johnston 664409b169
Fix bug in account data replication stream. (#7656)
* Ensure account data stream IDs are unique.

The account data stream is shared between three tables, and the maximum
allocated ID was tracked in a dedicated table. Updating the max ID
happened outside the transaction that allocated the ID, leading to a
race where if the server was restarted then the same ID could be
allocated but the max ID failed to be updated, leading it to be reused.

The ID generators have support for tracking across multiple tables, so
we may as well use that instead of a dedicated table.

* Fix bug in account data replication stream.

If the same stream ID was used in both global and room account data then
the getting updates for the replication stream would fail due to
`heapq.merge(..)` trying to compare a `str` with a `None`. (This is
because you'd have two rows like `(534, '!room')` and `(534, None)` from
the room and global account data tables).

Fix is just to order by stream ID, since we don't rely on the ordering
beyond that. The bug where stream IDs can be reused should be fixed now,
so this case shouldn't happen going forward.

Fixes #7617
2020-06-09 16:28:57 +01:00
..
streams Fix bug in account data replication stream. (#7656) 2020-06-09 16:28:57 +01:00
__init__.py Move client command handling out of TCP protocol (#7185) 2020-04-06 09:58:42 +01:00
client.py Typo fixes. 2020-06-05 08:43:21 -04:00
commands.py Support any process writing to cache invalidation stream. (#7436) 2020-05-07 13:51:08 +01:00
handler.py Ensure ReplicationStreamer is always started when replication enabled. (#7579) 2020-05-27 11:44:19 +01:00
protocol.py Don't relay REMOTE_SERVER_UP cmds to same conn. (#7352) 2020-04-29 14:10:59 +01:00
redis.py Fix Redis reconnection logic (#7482) 2020-05-13 09:57:15 +01:00
resource.py Have all instances correctly respond to REPLICATE command. (#7475) 2020-05-13 10:27:02 +01:00