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

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