Debezium LSN Position Loss During PostgreSQL Failover Explained
Understanding Debezium's LSN position loss during PostgreSQL failover and solutions.
This entry discusses a failure mode encountered while using Debezium with PostgreSQL 16 and Patroni 3.3.1. When promoting a standby, Debezium needed a logical replication slot to continue safely. Creating a new slot post-promotion could lead to an event gap, emphasizing the importance of treating PostgreSQL's replication slot and Debezium's Kafka Connect offset as a unified distributed checkpoint. The insights are crucial for engineers managing data pipelines and ensuring data consistency during failover scenarios.
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