ClientError 404，无法将mongodb连接到neo4j

如何解决ClientError 404，无法将mongodb连接到neo4j

我们没有经历将所有东西都带入 Neo4j 的痛苦过程，而是采用了更简单的解决方案。由于配置不是我的专长https://medium.com/neo4j/transform-mongodb-collections-automagically-into-graphs-9ea085d6e3ef

我按照 here 中的说明进行配置（我想将 mongo 中的数据导入到 neo4j）。我在 OSX Catalina。我应该使用什么端点？以下是我的设置：

我有一个用 pipenv 创建的虚拟环境。

mongo-connector version: 3.1.1
Python version: 3.9.1 
pymongo version: 3.11.3
MongoDB version: 4.4.3

neo4j_doc_manager version: unkNown（按照上述说明安装良好）。

现在当我尝试连接并运行以下内容时

mongo-connector -m localhost:27017 -t http://localhost:11005/data/db -d neo4j_doc_manager

我使用端点是因为我有以下端点

bolt: https://localhost:11004
http: https://localhost:11005
https: https://localhost:7473

我的 neo4j 位置

/Users/Library/Application Support/com.Neo4j.Relate/Data/dbmss/dbms-bbb9318b-9083-4ebf-a934-e17ef055ae22

我已禁用身份验证：

dbms.security.auth_enabled=false

我不知道为什么会出现 HTTP 404：

2021-02-05 08:11:15,577 [ALWAYS] mongo_connector.connector:50 - Starting mongo-connector version: 3.1.1
2021-02-05 08:11:15,578 [ALWAYS] mongo_connector.connector:50 - Python version: 3.9.1 (default,Jan  8 2021,17:17:17) 
[Clang 12.0.0 (clang-1200.0.32.28)]
2021-02-05 08:11:15,612 [ALWAYS] mongo_connector.connector:50 - Platform: macOS-10.15.7-x86_64-i386-64bit
2021-02-05 08:11:15,612 [ALWAYS] mongo_connector.connector:50 - pymongo version: 3.11.3
2021-02-05 08:11:15,619 [ALWAYS] mongo_connector.connector:50 - Source MongoDB version: 4.4.3
2021-02-05 08:11:15,619 [ALWAYS] mongo_connector.connector:50 - Target DocManager: mongo_connector.doc_managers.neo4j_doc_manager version: unkNown
2021-02-05 08:11:15,633 [CRITICAL] mongo_connector.oplog_manager:713 - Exception during collection dump
Traceback (most recent call last):
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/py2neo/core.py",line 258,in get
    response = self.__base.get(headers=headers,redirect_limit=redirect_limit,**kwargs)
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/py2neo/packages/httpstream/http.py",line 966,in get
    return self.__get_or_head("GET",if_modified_since,headers,redirect_limit,line 943,in __get_or_head
    return rq.submit(redirect_limit=redirect_limit,line 452,in submit
    return Response.wrap(http,uri,self,rs,**response_kwargs)
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/py2neo/packages/httpstream/http.py",line 489,in wrap
    raise inst
py2neo.packages.httpstream.http.ClientError: 404 Not Found

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/mongo_connector/util.py",line 33,in wrapped
    return f(*args,**kwargs)
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/mongo_connector/doc_managers/neo4j_doc_manager.py",line 78,in bulk_upsert
    tx = self.graph.cypher.begin()
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/py2neo/core.py",line 661,in cypher
    Metadata = self.resource.Metadata
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/py2neo/core.py",line 213,in Metadata
    self.get()
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/py2neo/core.py",line 267,in get
    raise_from(self.error_class(message,**content),error)
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/py2neo/util.py",line 235,in raise_from
    raise exception
py2neo.error.GraphError: HTTP GET returned response 404

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/mongo_connector/oplog_manager.py",line 668,in do_dump
    upsert_all(dm)
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/mongo_connector/oplog_manager.py",line 651,in upsert_all
    dm.bulk_upsert(docs_to_dump(from_coll),mapped_ns,long_ts)
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/mongo_connector/util.py",line 44,in wrapped
    raise new_type(str(exc_value)).with_traceback(exc_tb)
  File "/Users/.local/share/virtualenvs/insiderTrading-L0T4T-gI/lib/python3.9/site-packages/mongo_connector/util.py",in raise_from
    raise exception
mongo_connector.doc_managers.error_handler.Neo4jOperationFailed: HTTP GET returned response 404
2021-02-05 08:11:15,634 [ERROR] mongo_connector.oplog_manager:723 - OplogThread: Failed during dump collection cannot recover! Collection(Database(MongoClient(host=['localhost:27017'],document_class=dict,tz_aware=False,connect=True,replicaset='rs0'),'local'),'oplog.rs')
2021-02-05 08:11:16,630 [ERROR] mongo_connector.connector:408 - MongoConnector: OplogThread <OplogThread(Thread-2,started 123145708253184)> unexpectedly stopped! Shutting down

解决方法

您应该检查您使用的 py2neo 版本是否与 Neo4j 版本兼容。我怀疑它不是，因为 py2neo.packages.httpstream 是一个非常过时的包名称，并且可能也指的是已弃用/已删除的 HTTP 端点。