2019/06/14 08:25:03 [error] 94#0: *3829 connect() failed (111: Connection refused) while connecting to upstream, client: ***.***.***.***, server: _, request: "GET /managed/v1/version HTTP/2.0", upstream: "http://127.0.0.1:7772/v1/version", host: "***"
2019/06/14 08:25:30 [error] 92#0: *3932 connect() failed (111: Connection refused) while connecting to upstream, client: ***.***.***.***, server: _, request: "GET /managed/v1/version HTTP/1.1", upstream: "http://127.0.0.1:7772/v1/version", host: "***"