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我正在尝试部署一个 greengrass 组，但部署仍在继续（正在进行中）。我面临的错误是：

  1. “MQTT 客户端无法连接到代理”
  2. MQTT[client] x509: 未知权威签署的证书
  3. 请求的证书加载 [file:///greengrass/certs/a9029bd10f.cert.pem] 错误：[]
  4. [INFO] - 未找到代理 URL。
  5. 请求的证书加载 [file:///greengrass/certs/root.ca.pem] 错误：[] 我认为这些是在部署中造成问题。下面是runtime.log. 我在 Windows 10 上使用 AWS IOT Greengrass。请帮助我。
[2020-01-18T04:49:58.036Z][DEBUG]-[3]Requested certificate load [file:///greengrass/certs/root.ca.pem] with error: [<nil>]
[2020-01-18T04:49:58.037Z][DEBUG]-[3]Requested key load [file:///greengrass/certs/a9029bd10f.private.key] with error: [<nil>]
[2020-01-18T04:49:58.038Z][DEBUG]-[3]Requested certificate load 
[file:///greengrass/certs/a9029bd10f.cert.pem] with error: [<nil>]
[2020-01-18T04:49:58.038Z][INFO]-Started Deployment Agent to listen for updates.
[2020-01-18T04:49:58.038Z][INFO]-Connecting with MQTT.  {"endpoint": "a2fhwgkt3lz1ij-ats.iot.us-east-1.amazonaws.com:8883", "clientId": "myproject_Core"}
[2020-01-18T04:49:58.038Z][DEBUG]-MQTT connection attempt.      {"attemptId": "YNTA", "clientId": "myproject_Core"}
[2020-01-18T04:49:58.038Z][DEBUG]-New MQTT connection attempt
[2020-01-18T04:49:58.038Z][DEBUG]-Acquired lock for connection attempt
[2020-01-18T04:49:58.038Z][DEBUG]-Disconnect client     {"force": false}
[2020-01-18T04:49:58.648Z][WARN]-MQTT[client]   x509: certificate signed by unknown authority
[2020-01-18T04:49:58.648Z][WARN]-MQTT[client]   Failed to connect to a broker
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