连接到上游时套接字/ puma.sock失败（2：没有这样的文件或目录）

Question

我使用puma和nginx配置我的rails应用，但在运行时我收到以下异常：

*9 connect() to unix:/home/nikhil/rorworkspace/DrinkApp/shared/sockets/puma.sock failed (2: No such file or directory) 
while connecting to upstream, client: 127.0.0.1, server: localhost, request: "GET /drinks HTTP/1.1", 
upstream: "http://unix:/home/nikhil/rorworkspace/DrinkApp/shared/sockets/puma.sock:/drinks", host: "localhost"