'JRedisPool' and 'DefaultLettucePool' have been migrated to 'commons-pool2'. 'PoolConfig' has been deprecated, and will be removed in '1.4', as all required operations are available via 'GenericObjectPoolConfig'. Along the way a minor bug within 'LettuceConnection' has been resolved, which prevented 'RedisAsyncConnections' from being properly closed/returned to pool. Original Pull Request: #50