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* 1.21.0rc3Erik Johnston2020-10-081-1/+0
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* Reduce serialization errors in MultiWriterIdGen (#8456)Erik Johnston2020-10-071-0/+1
We call `_update_stream_positions_table_txn` a lot, which is an UPSERT that can conflict in `REPEATABLE READ` isolation level. Instead of doing a transaction consisting of a single query we may as well run it outside of a transaction.