The MySQL dictionary source now automatically retries on unexpected connection failures, such as "Lost connection to MySQL server during query", improving stability during SSL/TLS connections.
Why it matters
This feature addresses intermittent connection failures with MySQL dictionaries in ClickHouse, particularly during SSL/TLS sessions. It enhances reliability by retrying queries when unexpected disconnections occur, reducing query errors and improving user experience.How to use it
This retry behavior is enabled by default for MySQL dictionaries in ClickHouse. Users do not need to take additional steps; ClickHouse will automatically retry queries if a connection loss is detected during dictionary data fetching.