AI BriefingImproving Service Stability by Implementing Failover with Debezium MSK Connect
Key point
Shares how to maintain data consistency when failures occur while operating Debezium MSK Connect, using Offsets and creating new Connectors.
Details
We built a monitoring and alerting system to prepare for failures that can occur while operating Debezium MSK Connect. Using the Topic Heartbeat feature via the heartbeat.interval.ms option, we periodically check the connection status, and we operate an on-call system that sends Slack notifications when an anomaly occurs.
When a Connector failure occurs, we ensure data consistency by using the Offset to reprocess data from a specific point in time. If Offset recovery is not possible, we create a new Connector by republishing existing topic data for the desired period to correct the data.
Additionally, to solve the problem of message processing order not being guaranteed, we use the following strategies.
- Consumer Worker Configuration: Transforms messages received from MSK and stores them in the new system
- Applying AOP: Configured to compare message modification times so that only the latest message is processed
- Using Custom SQL: Selectively snapshots only the data needed during Failover using the
snapshot.select.statement.overridesoption
This Failover process plays a key role in minimizing service disruption and maintaining data integrity, thereby increasing the reliability of the system.
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