我正在用Kafka、Druid和超集测试数据流。
我在Druid有一些数据（见1）。皮克特）。
之后，我可以通过选项“refresh druid metadata”（参见2.pic）在超集中生成druid数据源。问题是，当我想查询数据时，我收到以下错误消息：

URLError: <urlopen error [Errno -2] Name or service not known>

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/superset/viz.py", line 329, in get_df_payload
    df = self.get_df(query_obj)
  File "/usr/lib/python2.7/site-packages/superset/viz.py", line 142, in get_df
    self.results = self.datasource.query(query_obj)
  File "/usr/lib/python2.7/site-packages/superset/connectors/druid/models.py", line 1238, in query
    client=client, query_obj=query_obj, phase=2)
  File "/usr/lib/python2.7/site-packages/superset/connectors/druid/models.py", line 959, in get_query_str
    return self.run_query(client=client, phase=phase,**query_obj)
  File "/usr/lib/python2.7/site-packages/superset/connectors/druid/models.py", line 1126, in run_query
    client.timeseries(**qry)
  File "/usr/lib/python2.7/site-packages/pydruid/client.py", line 167, in timeseries
    return self._post(query)
  File "/usr/lib/python2.7/site-packages/pydruid/client.py", line 484, in _post
    res = urllib.request.urlopen(req)
  File "/usr/lib64/python2.7/urllib2.py", line 154, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib64/python2.7/urllib2.py", line 431, in open
    response = self._open(req, data)
  File "/usr/lib64/python2.7/urllib2.py", line 449, in _open
    '_open', req)
  File "/usr/lib64/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/usr/lib64/python2.7/urllib2.py", line 1244, in http_open
    return self.do_open(httplib.HTTPConnection, req)
  File "/usr/lib64/python2.7/urllib2.py", line 1214, in do_open
    raise URLError(err)
URLError: <urlopen error [Errno -2] Name or service not known>

另见3。照片
知道有什么问题吗？
我通过nifi喂Kafka，然后我把Kafka的源头连接到山姆的Druid目标上。
谢谢您！
皮克特

皮克特

皮克特

超集中没有数据