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按照步骤配置 Titan 服务器

bin/titan.sh

Forking Cassandra...
Running `nodetool statusthrift`... OK (returned exit status 0 and printed string "running").
Forking Elasticsearch...
Connecting to Elasticsearch (127.0.0.1:9300)... OK (connected to 127.0.0.1:9300).
Forking Gremlin-Server...
Connecting to Gremlin-Server (127.0.0.1:8182)... OK (connected to 127.0.0.1:8182).
Run gremlin.sh to connect.

服务器完美启动，但是当我连接 python 然后运行脚本时，我在下面提到了错误

Traceback (most recent call last):
  File "/home/admin-12/Documents/bitbucket/ecodrone/ecodrone/GremlinConnector.py", line 28, in <module>
    data = (execute_query("""g.V()"""))
  File "/home/admin-12/Documents/bitbucket/ecodrone/ecodrone/GremlinConnector.py", line 22, in execute_query
    results = future_results.result()
  File "/usr/lib/python3.6/concurrent/futures/_base.py", line 432, in result
    return self.__get_result()
  File "/usr/lib/python3.6/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
  File "/home/admin-12/.local/lib/python3.6/site-packages/gremlin_python/driver/resultset.py", line 81, in cb
    f.result()
  File "/usr/lib/python3.6/concurrent/futures/_base.py", line 425, in result
    return self.__get_result()
  File "/usr/lib/python3.6/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
  File "/usr/lib/python3.6/concurrent/futures/thread.py", line 56, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/home/admin-12/.local/lib/python3.6/site-packages/gremlin_python/driver/connection.py", line 77, in _receive
    self._protocol.data_received(data, self._results)
  File "/home/admin-12/.local/lib/python3.6/site-packages/gremlin_python/driver/protocol.py", line 71, in data_received
    result_set = results_dict[request_id]
KeyError: None

版本控制我正在使用
Titan - 1.0.0
gremlin-python - 3.3.2
apache-tinkerpop-gremlin-server-3.3.1

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1 回答 1

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Titan 支持一些非常旧的 TinkerPop 版本，如果您尝试使用 gremlin-python 3.3.2，我相信您会发现其中不兼容。由于 Titan 不再受支持，我建议您升级到JanusGraph，这是一个更新和维护的 Titan 版本。

于 2018-04-13T10:15:34.233 回答