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synapse/changelog.d/12209.misc

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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 07:33:25 -06:00
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.