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May 31, 2019 · Databases

Understanding the HASH_SCAN Bug in MySQL Slave Rows Search Algorithms and Its Workarounds

This article explains the MySQL 5.6 slave_rows_search_algorithms parameter, reproduces the HASH_SCAN bug that causes "Can't find record" errors during row‑based replication, analyzes why it occurs, and provides practical solutions such as adjusting keys, changing the algorithm setting, or upgrading MySQL.