Issue description
Customer has done manual tcping clustering configuration.

He has followed Jboss EAP documentation, which is mentioning FRAG2 in the provided example [1].

By default, RH-SSO is configured with FRAG3 as protocol used for fragmentation.

Not having used FRAG3 but FRAG2 instead has led to major fragmentation and slowness issue on RH-SSO.

So should JBoss EAP documentation (section 24.2.3. Configure TCPPING) be updated with FRAG3 instead of FRAG2 ? 

JBoss EAP documentation providing example Frag2
24.2.3. Configure TCPPING [1]

~~~

# Define the socket bindings
/socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=jgroups-host-a:add(host=HOST_A,port=7600)
/socket-binding-group=standard-sockets/remote-destination-outbound-socket-binding=jgroups-host-b:add(host=HOST_B,port=7600)
batch
# Add the tcpping stack
/subsystem=jgroups/stack=tcpping:add
/subsystem=jgroups/stack=tcpping/transport=TCP:add(socket-binding=jgroups-tcp)
/subsystem=jgroups/stack=tcpping/protocol=TCPPING:add(socket-bindings=[jgroups-host-a,jgroups-host-b])
/subsystem=jgroups/stack=tcpping/protocol=MERGE3:add
/subsystem=jgroups/stack=tcpping/protocol=FD_SOCK:add
/subsystem=jgroups/stack=tcpping/protocol=FD_ALL:add
/subsystem=jgroups/stack=tcpping/protocol=VERIFY_SUSPECT:add
/subsystem=jgroups/stack=tcpping/protocol=pbcast.NAKACK2:add
/subsystem=jgroups/stack=tcpping/protocol=UNICAST3:add
/subsystem=jgroups/stack=tcpping/protocol=pbcast.STABLE:add
/subsystem=jgroups/stack=tcpping/protocol=pbcast.GMS:add
/subsystem=jgroups/stack=tcpping/protocol=MFC:add
/subsystem=jgroups/stack=tcpping/protocol=FRAG2:add
# Set tcpping as the stack for the ee channel
/subsystem=jgroups/channel=ee:write-attribute(name=stack,value=tcpping)
run-batch
reload
~~~

RH-SSO using FRAG3 as default

RH-SSO 7.3 is specifying FRAG3 as default.

extract from standalone.xml (same with domain.xml and standalone-ha.xml) 

~~~
<stack name="tcp">
<transport type="TCP" socket-binding="jgroups-tcp"/>
<socket-protocol type="MPING" socket-binding="jgroups-mping"/>
<protocol type="MERGE3"/>
<protocol type="FD_SOCK"/>
<protocol type="FD_ALL"/>
<protocol type="VERIFY_SUSPECT"/>
<protocol type="pbcast.NAKACK2"/>
<protocol type="UNICAST3"/>
<protocol type="pbcast.STABLE"/>
<protocol type="pbcast.GMS"/>
<protocol type="MFC"/>
<protocol type="FRAG3"/>
</stack>
~~~

[1] https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.3/html/configuration_guide/configuring_high_availability