Where does shared state actually break in large multi-agent systems? (50+ node war stories)

I’ve been studying large scale multi agent deployments (AutoGen, CrewAI, custom swarms), and there’s a big gap between tutorial setups and real production clusters. Everything works at 5 agents. At 50 to 100+ concurrent agents with high frequency updates and multi node setups, things fall apart. If you’re running very large scale, I’d like to hear the exact failure modes you’re hitting: Race conditions / Last Write Wins . At what agent count does standard shared memory become unusable? Are you losing updates or adding custom locking? Multi node desync . How do you keep state consistent across Docker containers or servers? (Many seem to bolt Redis onto frameworks not designed for it and live with forks.) Poisoned context . When one agent writes garbage/hallucinated data into shared state, how quickly does it corrupt the whole swarm? If you’re running huge clusters and have war stories, please share here or DM me. Especially interested in 50+ node edge cases.