The Stellar (XLM) network was down for about two hours on Wednesday, due to a crash in trusted nodes, Reddit users noted. The Stellar network uses a series of nodes run by voluntary power users, as well as by the Stellar Development Foundation. The Stellar network is now back to full functioning.
The problem seems to be in the voting system, which assigns reputation to nodes. For some reason, voters boosted the reputation of SDK nodes, which were mostly responsible for the consensus. This also meant that a system designed to be distributed ended up centralizing itself due to voting behavior.