Cloudflare Announces General Availability of Hyperdrive MySQL Support, Fixes Rare Caching Bug

Cloudflare’s Hyperdrive, the global database connection pooler for Workers, has moved from beta to general availability for MySQL after 20 targeted bug fixes. The update resolves a subtle caching issue that caused empty query responses in a small percentage of requests, a problem that only surfaced when Hyperdrive’s MySQL caching was enabled. Additional fixes addressed character‑set encoding bugs: the initial use of deprecated utf8 caused emoji loss, and a COM_RESET_CONNECTION command reset the connection to the server’s default latin1 encoding, breaking utf8mb4 support. The GA release also confirms that Hyperdrive now meets the 99.99 % availability target set during beta testing, ensuring reliable, low‑latency database access for Workers. The patching of these bugs demonstrates Cloudflare’s commitment to robust, cross‑database support and highlights the complexity of maintaining consistent protocol behavior across distributed pooling and CDN caching layers.