We now release Jedis cluster node connections with Jedis.close() to the pool instead of Pool.returnResource(…). The close() method itself checks whether the connection was broken and if so, the connection gets destroyed. Destroying broken connections prevents the pool from supplying broken connections on borrow when testOnBorrow is disabled.
The only case where we return broken resources ourselves to the Pool is when we discover a broken connection ourselves: If we run into a NullPointerException or RedisConnectionFailureException, then we consider a connection is broken.
Original Pull Request: #271
b1aef2717e