synapse/changelog.d/12209.misc
Nick Mills-Barrett 993d90f82b
Use a sequence to generate AS transaction IDs, drop last_txn AS state (#12209)
Switching to a sequence means there's no need to track `last_txn` on the
AS state table to generate new TXN IDs. This also means that there is
no longer contention between the AS scheduler and AS handler on updates
to the `application_services_state` table, which will prevent serialization
errors during the complete AS txn transaction.
2022-04-01 13:33:25 +00:00

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Switch to using a sequence to generate AS transaction IDs. Contributed by Nick Beeper. If running synapse with a dedicated appservice worker, this MUST be stopped before upgrading the main process and database.