Unexpected error 'version' when trying to connect to Druid Datasource

[ankitmani2004]

A clear and concise description of what the bug is.

I have Druid cluster and Superset running in Kube. Druid has 2 datasources. I have used amancevice superset image. My dockerfile is given below:

FROM amancevice/superset:latest
USER root
COPY config_frm_amancevice.py /usr/local/lib/python3.8/site-packages/superset/config.py
RUN pip install pydruid
RUN pip install "apache-superset[druid]"
USER superset

config_frm_amancevice.py file updating DRUID_IS_ACTIVE to True

Expected results

to connect the datasource in Druid

Actual results

Getting Error in UI:
Unexpected error
'version'

detailed log:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/superset/viz.py", line 540, in get_df_payload
df = self.get_df(query_obj)
File "/usr/local/lib/python3.8/site-packages/superset/viz.py", line 270, in get_df
self.results = self.datasource.query(query_obj)
File "/usr/local/lib/python3.8/site-packages/superset/connectors/druid/models.py", line 1390, in query
query_str = self.get_query_str(client=client, query_obj=query_obj, phase=2)
File "/usr/local/lib/python3.8/site-packages/superset/connectors/druid/models.py", line 968, in get_query_str
return self.run_query(client=client, phase=phase, **query_obj)
File "/usr/local/lib/python3.8/site-packages/superset/connectors/druid/models.py", line 1165, in run_query
self.cluster.get_druid_version()
File "/usr/local/lib/python3.8/site-packages/superset/connectors/druid/models.py", line 193, in get_druid_version
return json.loads(requests.get(endpoint, auth=auth).text)["version"]
KeyError: 'version'

How to reproduce the bug

1. Go to 'Superset UI'
2. Click on 'Data' then on "Druid Clusters"
3. Give Druid broker host and port name
4. Click on 'Data' then on "Druid Datasources"
5. Give the datasource name and SAVE
6. click on Datasource name
7. See error

Environment

(please complete the following information):

• superset version: 1.0.1
• python version: 3.8