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When a standby replays an XLOG_PARAMETER_CHANGE record that lowers wal_level below logical, we invalidate all logical slots in hot standby mode. However, if this record was replayed while not in hot standby mode, logical slots could remain valid even after promotion, potentially causing an assertion failure during WAL record decoding. To fix this issue, this commit adds a check for hot_standby status when restoring a logical replication slot on standbys. This check ensures that logical slots are invalidated when they become incompatible due to insufficient wal_level during recovery. Backpatch to v16 where logical decoding on standby was introduced. Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Reviewed-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com> Discussion: https://postgr.es/m/CAD21AoABoFwGY_Rh2aeE6tEq3HkJxf0c6UeOXn4VV9v6BAQPSw%40mail.gmail.com Backpatch-through: 16 |
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