OrientDB Gremlin服务器无法在python中工作

我在python中使用orientdb和gremlin服务器，gremlin服务器已成功启动，但当我试图通过gremlin代码向orientdb添加一个顶点时，出现了一个错误

query = """graph.addVertex(label, "Test", "title", "abc", "title", "abc")"""

以下是回溯

/usr/bin/python3.6 /home/admin-12/Documents/bitbucket/ecodrone/ecodrone/test/test1.py
Traceback (most recent call last):
  File "/home/admin-12/Documents/bitbucket/ecodrone/ecodrone/test/test1.py", line 27, in <module>
    result = execute_query("""graph.addVertex(label, "Test", "title", "abc", "title", "abc")""")
  File "/home/admin-12/Documents/bitbucket/ecodrone/ecodrone/GremlinConnector.py", line 21, 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 106, in data_received
    "{0}: {1}".format(status_code, data["status"]["message"]))
gremlin_python.driver.protocol.GremlinServerError: 599: Error during serialization: Infinite recursion (StackOverflowError) (through reference chain: com.orientechnologies.orient.core.id.ORecordId["record"]->com.orientechnologies.orient.core.record.impl.ODocument["schemaClass"]->com.orientechnologies.orient.core.metadata.schema.OClassImpl["document"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"]->com.orientechnologies.orient.core.record.impl.ODocument["owners"])

Process finished with exit code 1

/usr/bin/python3.6/home/admin-12/Documents/bitbucket/ecodrone/ecodrone/test/test1.py
回溯（最近一次呼叫最后一次）：
文件“/home/admin-12/Documents/bitbucket/ecodrone/ecodrone/test/test1.py”，第27行，在
结果=执行查询（““”graph.addVertex（标签，“测试”、“标题”、“abc”、“标题”、“abc”）”）
文件“/home/admin-12/Documents/bitbucket/ecodrone/ecodrone/gremlinconconnector.py”，执行查询中的第21行
结果=未来的结果。结果（）
文件“/usr/lib/python3.6/concurrent/futures/_base.py”，第432行，在结果中
返回self.\u获取\u结果（）
文件“/usr/lib/python3.6/concurrent/futures/_base.py”，第384行，在“获取结果”中
提出自己的意见
cb中的文件“/home/admin-12/.local/lib/python3.6/site packages/gremlin_python/driver/resultset.py”，第81行
f、 结果（）
文件“/usr/lib/python3.6/concurrent/futures/_base.py”，第425行，在结果中
返回self.\u获取\u结果（）
文件“/usr/lib/python3.6/concurrent/futures/_base.py”，第384行，在“获取结果”中
提出自己的意见
文件“/usr/lib/python3.6/concurrent/futures/thread.py”，第56行，运行中
结果=self.fn（*self.args，**self.kwargs）
文件“/home/admin-12/.local/lib/python3.6/site packages/gremlin_python/driver/connection.py”，第77行，在_receive中
接收到的自检协议数据（数据、自检结果）
文件“/home/admin-12/.local/lib/python3.6/site-packages/gremlin\u-python/driver/protocol.py”，第106行，在收到的数据中
“{0}:{1}”。格式（状态代码，数据[“状态”][“消息”]））
gremlin_python.driver.protocol.GremlinServerError:599:序列化期间出错：无限递归（StackOverflowerError）（通过引用链：com.orientechnologies.orient.core.id.ORecordId[“record”]->com.orientechnologies.orient.core.record.impl.ODocument[“schemaClass”]->.com.orientechnologies.orient.core.metadata.schema.oclassimll[“文档”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]->com.orientechnologies.orient.core.record.impl.ODocument[“所有者”]）
进程已完成，退出代码为1

首先，我非常建议您不要使用Graph API进行变异。最好使用Traversal API进行变异，并执行以下操作：

g.addV('Test').
  property('title1', 'abc').
  property('title2', 'abc')

第二，我认为发生错误是因为您返回了一个

顶点

，其中包含一个

或cordid

，这是顶点标识符，而Gremlin服务器不知道如何处理它。我不知道OrientDB是否构建了序列化程序来处理这个问题，但如果它们这样做了，那么您将需要使用des更详细一点——基本上，您会想知道OrientDB是否公开了TinkerPop

IORegistry

，用于所有可能通过网络发回的自定义类

如果它们不返回，那么您将希望避免返回它们或自己转换它们。TinkerPop已经建议您不要返回完整的

Vertex

对象，而只返回您需要的数据。因此，与其

g.V（）

，不如将

Vertex

转换为

Map

with

g.V（）.valueMap（'title'）

或类似的内容（可能使用

project（）

step）。如果您确实需要顶点标识符，则需要将其转换为TinkerPop序列化程序能够理解的内容。这可能意味着一些简单的事情，如：

g.V().has("title1","abc").id().next().toString()

关于“…使用Graph API进行变异。因此更喜欢Traversal API…”我做了一些测试，发现Traversal AP