这是来自Nginx的错误日志
upstream timed out (110: Connection timed out) while connecting to upstream, client: 10.255.0.3, server: 10.1.232.220, request: "GET /Microservice/microservices HTTP/1.1", upstream: "http://10.255.0.10:8765/Microservice/microservices", host: "10.1.232.220"
nginx是docker swarm中的一个服务，也是我试图调用的后端，我从nginx容器ping到错误日志中显示的ip，没有任何问题，任何关于这个问题的想法？