Redis Distributed Lock Failures During Master-Slave Failover and Mitigation Strategies
Redis Lock Vulnearbility Analysis
Asynchronous replication creates critical vulnerabilities during failover scenarios:
Timeline:
1. Client A acquires lock on master (SET resource_id unique_val NX EX 30)
2. Lock replication to replica delayed (ms to hundreds of ms)
3. Master fails, sentinel triggers failover (3-10 seconds)
4. Replica becomes new ...
Posted on Mon, 25 May 2026 19:45:58 +0000 by 182x