Cache thread safety issues with uWSGI multi-process deployment

In-memory caching libraries may have thread safety issues when Flask runs under uWSGI with multiple processes and threads, potentially causing race conditions

For uWSGI deployments, use file-based caching (e.g., JSON files) or external cache stores (Redis, Memcached) instead of in-memory caches. Verify thread-safety guarantees of caching libraries before use in multi-process environments.