builder does not reconnect after network fail

[mikhailnov]

Today all my builders on 3 different servers had in logs:

Sun Jul  7 05:59:43 2019 Statistics [ERROR] | libcurl: The requested URL returned error: 403 Forbidden
Sun Jul  7 06:38:36 2019 Main [ERROR] | libcurl: There was an error performing request:
Sun Jul  7 06:38:36 2019 Main [ERROR] | libcurl: Error code 22
Sun Jul  7 06:38:36 2019 Main [ERROR] | libcurl: The requested URL returned error: 502 Bad Gateway
Sun Jul  7 06:38:42 2019 Statistics [ERROR] | libcurl: There was an error performing request:
Sun Jul  7 06:38:42 2019 Statistics [ERROR] | libcurl: Error code 22
Sun Jul  7 06:38:42 2019 Statistics [ERROR] | libcurl: The requested URL returned error: 502 Bad Gateway
Sun Jul  7 06:38:46 2019 Main [ERROR] | libcurl: There was an error performing request:
Sun Jul  7 06:38:46 2019 Main [ERROR] | libcurl: Error code 22
Sun Jul  7 06:38:46 2019 Main [ERROR] | libcurl: The requested URL returned error: 502 Bad Gateway
Sun Jul  7 06:38:52 2019 Statistics [ERROR] | libcurl: There was an error performing request:
Sun Jul  7 06:38:52 2019 Statistics [ERROR] | libcurl: Error code 22
Sun Jul  7 06:38:52 2019 Statistics [ERROR] | libcurl: The requested URL returned error: 502 Bad Gateway
Sun Jul  7 06:38:56 2019 Main [ERROR] | libcurl: There was an error performing request:
Sun Jul  7 06:38:56 2019 Main [ERROR] | libcurl: Error code 22
Sun Jul  7 06:38:56 2019 Main [ERROR] | libcurl: The requested URL returned error: 502 Bad Gateway
Sun Jul  7 06:39:02 2019 Statistics [ERROR] | libcurl: There was an error performing request:
Sun Jul  7 06:39:02 2019 Statistics [ERROR] | libcurl: Error code 22
Sun Jul  7 06:39:02 2019 Statistics [ERROR] | libcurl: The requested URL returned error: 502 Bad Gateway
Sun Jul  7 06:39:06 2019 Main [ERROR] | libcurl: There was an error performing request:
Sun Jul  7 06:39:06 2019 Main [ERROR] | libcurl: Error code 22
Sun Jul  7 06:39:06 2019 Main [ERROR] | libcurl: The requested URL returned error: 502 Bad Gateway

Neither of them was catching new tasks from ABF, I had to restart them manually. Maybe it is somehow releated to rate limit on ROSA ABF.