节点。js应用程序突然以100%的速度加载CPU并挂起

I have simple application on node.js running on linux virtual machine. It listens for tcp messages and sending them to the clients using socket.io library. And after some time of low CPU usage it suddenly starts to load CPU higher and higher until application hangs up. The script is simple and I can not understand what's wrong with it.I have simple application on node.js running on