Selected Java Interview Questions
Jun 23, 2025 · Backend Development
Why Did My Snowflake IDs Collide? Lessons and Fixes for Distributed Systems
An unexpected primary-key duplicate error in a low-traffic Spring Cloud app revealed that multiple servers shared the same Snowflake workId, causing ID collisions; the article explains Snowflake's structure, its pros and cons, and offers three practical methods—including IP-based calculation, environment variables, and middleware—to ensure globally unique workIds.
ID collisionMybatisPlusSnowflake ID
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