library migration

🔴 1. Data Access & Connection Management
These are critical because they affect performance, scalability, and outages.

🔹 Redis
❌ Jedis (older pattern, topology issues)

✅ Lettuce (reactive, auto-reconnect)

✅ Valkey Glide (AWS recommended)

🔹 JDBC Connection Pool
❌ Apache DBCP

❌ C3P0

✅ HikariCP (default in Spring Boot, fastest, stable)

 

🔹 ORM / Persistence
❌ Old Hibernate 4.x

❌ MyBatis legacy configs

✅ Hibernate 6+

✅ Spring Data JPA latest

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