流媒体与德鲁伊，卡夫卡，Superset

Question

我正在使用Kafka，Druid和SuperSet测试数据流。

我正处于德鲁伊的一些数据（见1. picutre）。

之后我可以通过选项“刷新德鲁伊元数据”在Superset中生成德鲁伊数据源（参见2.pic）问题是当我想查询数据时，我收到此错误消息：

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>

并且还看到3. pic

知道什么可能是个问题吗？

我通过NiFi喂Kafka，然后我在SAM中将kafka源连接到了德鲁伊目标。

谢谢！

1. 图片qazxsw poi
2. 图片qazxsw poi
3. 图片qazxsw poi
4. 超集没有数据

Answer 1

看起来像Superset连接到您的Broker-Node时遇到了问题。检查群集运行状况。特别是Broker-和Coordinator Node日志。

Answer 2

问题解决了，问题是在超集UI中的集群配置中没有定义代理主机。我把它设置为value：localhost，现在它已启动并运行。