Right now thread-safety achieved via the excessive amount of locks, this leads to performance degradation and it's killing scalability. While locks aren't slow, lock contention is. Practical solution: remove any shared states/data, and re-design the core using inter-thread message-based communication without any contention. This approach scales perfectly for traditional networking on top of UDP sockets, Disruptor works best for this.

Additional information regarding multi-threading you can find here.