Causal Clustering nodes refuse to discover each other

[Kyle]

Hello,

I am trying to set up a Causal Cluster of 3 Core nodes and 0 read-only nodes. However, all 3 machines get stuck when trying to connect to the other cluster members. I am running the linux CentOS machines in AWS EC2 inside a security group that allows all TCP traffic within the group. I've confirmed that the machines can talk to each other using netcat and curl. I've confirmed using tcpdump that each machine is receiving TCP traffic from the other machines on port 5000, but not on ports 6000 or 7000. I've also tried switching the 3 listen addresses to the commented out lines in the gist below.

$ java -version

java version "1.8.0_77"

Java(TM) SE Runtime Environment (build 1.8.0_77-b03)

Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)

Neo4j Enterprise 3.2.3

neo4j.log output (machine with <ip1>) https://gist.github.com/anonymous/abcbad9586a7ae851d31fb6f5ca2f8ba

neo4j.conf file (machine with <ip1>) https://gist.github.com/anonymous/ebd4061f9eed6f2b97378c8d00d404a6

netstat -tuplen (machine with <ip1>)

Proto Recv-Q Send-Q Local Address               Foreign Address             State       User       Inode      PID/Program name

tcp        0      0 ::ffff:<ip1>:5000           :::*                        LISTEN      0          387007     -

tcp        0      0 :::6000                     :::*                        LISTEN      0          387061     -

tcp        0      0 :::7000                     :::*                        LISTEN      0          386999     -

Thanks,

Kyle

[Kyle]

I've also tried Neo4j Enterprise 3.2.2 as well to see if it was a regression. I encountered the same results.

[Mark Needham]

What do you have the advertised address set as? I've been setting that to the private DNS name of the machines and it seems to work with that setting.

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[Kyle]

I set the advertised address to the private IP of the instances. I've now also tried the hostname as well without any luck. We don't expose the boxes to the open internet and instead use a VPN to connect so there are no public IPs. Is there a verbose flag or some other log file that I can use to better debug the issue?

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