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From Matt Burgess <>
Subject Re: NiFi-Neo4j Issues
Date Wed, 03 May 2017 23:08:32 GMT
Can you ping the Neo4j node from the NiFi node? Can you telnet from the NiFi node to the Neo4j
port? I suspect it's a firewall issue too, just want to take NiFi out of the equation for


> On May 3, 2017, at 6:22 PM, dale.chang13 <> wrote:
> Hi All,
> At the bottom you can find my question. Note, I am positive this is more a
> network issue, but I cannot seem to figure out the solution. I tried posting
> this to the  Neo4j Google+ board
> <!forum/neo4j>  , and as a relevant 
> NiFi-Neo4j Github issue <>   (I
> know this is not an official NiFi-supported processor, so you can handle
> this thread how you wish); however, no luck. First, here is the structure of
> my architecture:
> Windows 8 host machine with Windows Hyper-V Manager. Hyper-V Manager has 6
> RHEL nodes running a Hadoop cluster--Hortonworks. I have NiFi
> (no SSL enabled) on HDF (Hortonworks Data Flow). On the
> Windows host machine, I have Neo4j Enterprise (trial) edition 3.1.3.
> Windows/Neo4j configuration:
> - I found that my windows IP address i (windows.ip.address)
> - I started Neo4j EE and confirmed that the browser client works.
> - I went into the neo4j.conf file and enabled the property
> "dbms.bolt.connector.listen_address=, which allows Neo4j to
> listen on all networks
> - I also went into the Neo4j browser, went down to the settings tab, and
> configured the database URI to be bolt://(windows.ip.address):7687 (default
> is bolt://localhost:7687)
> - Additionally I did a netstat -a to see that the TCP connection is active
> and I have a service listening to and [::]:7687
> Linux/NiFi configuration:
> - According to the NiFi-Neo4j Github I linked above, I created a
> Neo4jBoltSessionPool Controller Service and specified the Bolt DB Connection
> URL to be a variety of things (, localhost:7687,
> (windows.ip.address):7687, (foreign.ip.address):7687, etc)
> - Created a PutCypher processor and put in a simple LOAD CSV WITH HEADERS
> FROM ${file_path} cypher query
> When I pass in a FlowFile (I have confirmed that the file path is saved as
> the file_path FlowFile attribute) and run the PutCypher processor, I get an
> error saying that the neo4j driver was "unable to connect to
> (ip.address):7687, ensure the database is running and that there is a
> working network connection to it"
> Is my configuration wrong or could it be that the Windows firewall is
> preventing communication to the bolt address:port?
> --
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