Openfire Clustering timeout - Not accepting new connections

I have been trying to connect two openfire nodes using hazelcast clustering. After successful setup and execution, it started throwing out time out exception and not accepting any new connections. Any help or directions on this ? Do we require any tweaks on the configuration?

Following is the configuration:

<hazelcast xsi:schemaLocation=“http://www.hazelcast.com/schema/config hazelcast-config-3.5.xsd”
xmlns=“http://www.hazelcast.com/schema/config
xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance”>
slf4j
30000
false
false
5701
0
10.4.xxx.xxx:5701
10.3.xxx.xxx:5701
10.10.1.*

Current users count:

Openfire version: 4.0.2

Hazelcast plugin version: 2.2.0

Hazelcast version: 3.5.1

Following are the error snapshot

I am right now trying with Hazelcast 3.5.5 in place of 3.5.1 to see whether problem still exists with the latest version in 3.5 series

Any suggestions on this?