synapse/changelog.d/17226.misc
Erik Johnston 466f344547
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Move towards using MultiWriterIdGenerator everywhere (#17226)
There is a problem with `StreamIdGenerator` where it can go backwards
over restarts when a stream ID is requested but then not inserted into
the DB. This is problematic if we want to land #17215, and is generally
a potential cause for all sorts of nastiness.

Instead of trying to fix `StreamIdGenerator`, we may as well move to
`MultiWriterIdGenerator` that does not suffer from this problem (the
latest positions are stored in `stream_positions` table). This involves
adding SQLite support to the class.

This only changes id generators that were already using
`MultiWriterIdGenerator` under postgres, a separate PR will move the
rest of the uses of `StreamIdGenerator` over.
2024-05-29 12:19:10 +00:00

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Move towards using `MultiWriterIdGenerator` everywhere.