EDR Server: Services fail to start due to connection error with RabbitMQ

Products

• Carbon Black EDR (formerly Cb Response)

Issue/Introduction

• Services fail to start. Logs show that RabbitMQ was the last service to start
• /var/log/messages shows errors

  • urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='localhost', port=5005): Max retries exceeded with url: /api/aliveness-test/%2F (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fb7286a07c0>: Failed to establish a new connection: [Errno 111] Connection refused'))

  • pyrabbit2.http.NetworkError: Error during request <class 'requests.exceptions.ConnectionError'> HTTPConnectionPool(host='localhost', port=5005): Max retries exceeded with url: /api/aliveness-test/%2F (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fb7286a07c0>: Failed to establish a new connection: [Errno 111] Connection refused'))

Environment

• EDR Server: 7.6.1

Cause

Entry for ipv4 (127.0.0.1) is missing a connection reference to localhost in /etc/hosts. 

Resolution

1. Add a reference to localhost for 127.0.0.1 in /etc/hosts
   • ex. 127.0.0.1   localhost localhost.localdomain
2. Restart services