TCPPING on Google Cloud Compute

[jcdang]

I'm trying to use TCPPING but there are no attempts for the second host to contact the first.  On the first host(10.240.93.16), I opened up netcat on port 7600.  I tested the connection and nothing is blocked on the port.  When I start up the second host(10.240.5.238), there is no attempt to connect to first host(10.240.93.16).  Is there something wrong with my configuration?

This is in my config:

        <subsystem xmlns="urn:jboss:domain:jgroups:3.0" default-stack="tcp">

                <channels default="ee">

                    <channel name="ee"/>

                </channels>

                <stacks default="tcp">

                    <stack name="tcp">

                        <transport type="TCP" socket-binding="jgroups-tcp" />

                        <protocol type="TCPPING">

                            <property name="initial_hosts">10.240.93.16[7600],10.240.5.238[7600]</property>

                            <property name="port_range">10</property>

                        </protocol>

                        <protocol type="MPING" socket-binding="jgroups-mping"/>

                        <protocol type="MERGE3"/>

                        <protocol type="FD_SOCK" socket-binding="jgroups-tcp-fd"/>

                        <protocol type="FD"/>

                        <protocol type="VERIFY_SUSPECT"/>

                        <protocol type="pbcast.NAKACK2"/>

                        <protocol type="UNICAST3"/>

                        <protocol type="pbcast.STABLE"/>

                        <protocol type="pbcast.GMS"/>

                        <protocol type="MFC"/>

                        <protocol type="FRAG2"/>

                        <protocol type="RSVP"/>

                    </stack>

                </stacks>

        </subsystem>