我正在使用 neo4j 3.1.3 版本，我收到以下错误：
2018-02-28 05:17:27.780+0000 ERROR [o.n.b.v.t.BoltProtocolV1] Failed to write response to driver Cannot write to buffer when closed
java.io.IOException: Cannot write to buffer when closed
at org.neo4j.bolt.v1.transport.ChunkedOutput.ensure(ChunkedOutput.java:163)
at org.neo4j.bolt.v1.transport.ChunkedOutput.writeShort(ChunkedOutput.java:94)
at org.neo4j.bolt.v1.packstream.PackStream$Packer.packStructHeader(PackStream.java:330)
at org.neo4j.bolt.v1.messaging.BoltResponseMessageWriter.onSuccess(BoltResponseMessageWriter.java:72)
at org.neo4j.bolt.v1.messaging.MessageProcessingHandler.onFinish(MessageProcessingHandler.java:111)
at org.neo4j.bolt.v1.runtime.BoltStateMachine.after(BoltStateMachine.java:105)
at org.neo4j.bolt.v1.runtime.BoltStateMachine.run(BoltStateMachine.java:201)
at org.neo4j.bolt.v1.messaging.BoltMessageRouter.lambda$onRun$3(BoltMessageRouter.java:80)
at org.neo4j.bolt.v1.runtime.concurrent.RunnableBoltWorker.execute(RunnableBoltWorker.java:135)
at org.neo4j.bolt.v1.runtime.concurrent.RunnableBoltWorker.run(RunnableBoltWorker.java:89)
at java.lang.Thread.run(Thread.java:748)
我使用了以下配置：
dbms.memory.heap.initial_size=8g
dbms.memory.heap.max_size=8g
dbms.memory.pagecache.size=4g
Machine description: 4 vCPUs, 15 GB memory
我的neo4j客户端是Python，所以使用 neo4j python驱动程序，版本1.5.3 。我在客户端遇到以下错误：
[2018-02-28 10:59:43,838: ERROR/MainProcess] Task api_keyword.tasks.job.update_application_rel[14f5baa6-09a5-44df-9bd7-982116e0b184] raised unexpected: ServiceUnavailable("Failed to write to closed connection Address(host='10.160.0.9', port=7687)",)
Traceback (most recent call last):
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/celery/app/trace.py", line 240, in trace_task
R = retval = fun(*args, **kwargs)
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/celery/app/trace.py", line 438, in __protected_call__
return self.run(*args, **kwargs)
File "/home/ubuntu/celeryprod/api/src/api_keyword/tasks/job.py", line 21, in update_application_rel
rel_label='APPLIED'
File "/home/ubuntu/celeryprod/api/src/api_keyword/utils/neo4j/base.py", line 76, in delete_relationship
self.run_query(neo4j_query)
File "/home/ubuntu/celeryprod/api/src/api_keyword/utils/neo4j/base.py", line 32, in run_query
res = Neo4jConnector().run_query(neo4j_query)
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/retrying.py", line 49, in wrapped_f
return Retrying(*dargs, **dkw).call(f, *args, **kw)
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/retrying.py", line 212, in call
raise attempt.get()
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/retrying.py", line 247, in get
six.reraise(self.value[0], self.value[1], self.value[2])
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/six.py", line 686, in reraise
raise value
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/retrying.py", line 200, in call
attempt = Attempt(fn(*args, **kwargs), attempt_number, False)
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/timeout_decorator/timeout_decorator.py", line 81, in new_function
return function(*args, **kwargs)
File "/home/ubuntu/celeryprod/api/src/core/services/neo4j.py", line 56, in run_query
result = session.run(cypher_query)
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/neo4j/v1/api.py", line 339, in run
self._connection.send()
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/neo4j/bolt/connection.py", line 263, in send
self._send()
File "/home/ubuntu/celeryprod/lib/python3.5/site-packages/neo4j/bolt/connection.py", line 275, in _send
raise self.Error("Failed to write to closed connection {!r}".format(self.server.address))
neo4j.exceptions.ServiceUnavailable: Failed to write to closed connection Address(host='10.160.0.9', port=7687)
我正在初始化这样的驱动程序：
self.driver = GraphDatabase.driver("bolt://{0}".format(self.neo4j_db_url),
auth=basic_auth(self.neo4j_username, self.neo4j_password), connection_timeout=60)
任何人都可以帮我解决这个问题。我需要调整的任何配置，还是我需要定义的任何其他配置？