Silently failure when ElasticSearch is unreachable

[To-om]

Request Type

Bug

Work Environment

Cortex 2.0.1

Problem Description

If ElasticSearch is not started, Cortex web interface shows an empty page, without any error message.

Complementary information

If ElasticSearch is unreachable, Cortex back-end returns the following error on any requests that need ES:

500 Internal Server Error

{"type":"NoNodeAvailable","message":"ElasticSearch cluster is unreachable"}

[liuxuehao]

Now I have the same problem, when I pull the image in docker and run it. Access it via google browser, prompting ‘’Error: ElasticSearch cluster is unreachable ’’
Ubuntu 16.04.3
Docker 19.03.1
Cortex: 3.0.0-RC4
Elasticsearch: 6.8.0