Cannot cluster WSO2 API manager 2.6.0 using Hazelcast - wso2

Question

I am working on Hazelcast clustering WSO2 API Manager (following doc: https://docs.wso2.com/display/AM260/Working+with+Hazelcast+Clustering#WorkingwithHazelcastClustering-EnablingHazelcastclustering) Here I have two nodes under the same domain 127.0.0.1.
Let us assume A is running in port 4001 while B is running in port 4002. I have joined the two nodes as
A -
<members>
<member>
<hostName>127.0.0.1</hostName>
<port>4002</port>
</member>
<member>
<hostName>127.0.0.1</hostName>
<port>4001</port>
</member>
</members>
B -
<members>
<member>
<hostName>127.0.0.1</hostName>
<port>4001</port>
</member>
<member>
<hostName>127.0.0.1</hostName>
<port>4001</port>
</member>
</members>
I also tried as;
A -
<members>
<member>
<hostName>127.0.0.1</hostName>
<port>4002</port>
</member>
</members>
B -
<members>
<member>
<hostName>127.0.0.1</hostName>
<port>4002</port>
</member>
</members>
But both methods returned as below
2019-11-27 13:23:16,763] INFO - SocketAcceptor [127.0.0.1]:0 [wso2.am.domain] [3.5.4] Accepting socket connection from /127.0.0.1:51206
[2019-11-27 13:23:16,763] INFO - TcpIpConnectionManager [127.0.0.1]:0 [wso2.am.domain] [3.5.4] Established socket connection between /127.0.0.1:4001
[2019-11-27 13:23:16,764] WARN - TcpIpConnectionManager [127.0.0.1]:0 [wso2.am.domain] [3.5.4] Wrong bind request from Address[127.0.0.1]:0! This node is not requested endpoint: Address[127.0.0.1]:4001
[2019-11-27 13:23:16,764] INFO - TcpIpConnection [127.0.0.1]:0 [wso2.am.domain] [3.5.4] Connection [/127.0.0.1:51206] lost. Reason: Socket explicitly closed
[2019-11-27 13:23:44,354] INFO - TcpIpConnectionManager [127.0.0.1]:0 [wso2.am.domain] [3.5.4] Established socket connection between /127.0.0.1:51211
[2019-11-27 13:23:44,359] INFO - TcpIpConnection [127.0.0.1]:0 [wso2.am.domain] [3.5.4] Connection [Address[127.0.0.1]:4002] lost. Reason: java.io.EOFException[Remote socket closed!]
[2019-11-27 13:23:44,360] WARN - ReadHandler [127.0.0.1]:0 [wso2.am.domain] [3.5.4] hz.wso2.am.domain.instance.IO.thread-in-1 Closing socket to endpoint Address[127.0.0.1]:4002, Cause:java.io.EOFException: Remote socket closed!
How to solve this issue?

Answer 1

[Issue solved]
The answer is "Use local machine IP instead of localhost ". There are 02 options.
Option 01
Add the following to the tasks/main.yml
# Get local IP
- name: get local ip
debug:
var: ansible_default_ipv4.address
and this to site.yml
- hosts: localhost
connection: local
Option 02
Add the following snippet to site.yml
---
- hosts: localhost
roles:
- carbon
connection: local
tasks:
- debug: var=ansible_all_ipv4_addresses
- debug: var=ansible_default_ipv4.address