WildFly Clustering without Multicast

External

• How do I switch clustering to TCP instead of multicast UDP in EAP 6? https://access.redhat.com/solutions/140103

Internal

• WildFly Configuration
• JBoss Clustering without Multicast

Procedure

Switch to a "tcp" Default Stack

Manual

Locate the "jgroups" subsystem in standalone.xml or domain.xml relevant profile, and set default-stack value to "tcp":

  ...
  <subsystem xmlns="urn:jboss:domain:jgroups:1.1" default-stack="tcp">
  ...

CLI

/subsystem=jgroups:write-attribute(name=default-stack,value=tcp)

Note that the operation requires reload (see reload)

Replace the MPING protocol with TCPPING

Manual

Locate the "tcp" stack inside the "jgroups" subsystem and replace the MPING protocol with TCPPING:

   ...
   <stack name="tcp">
      <transport type="TCP" socket-binding="jgroups-tcp"/>
      <protocol type="TCPPING">
          <property name="initial_hosts">1.2.3.4[7600],1.2.3.5[7600]</property>
          <property name="num_initial_members">2</property>
          <property name="port_range">0</property>
          <property name="timeout">2000</property>
       </protocol>
       <!--<protocol type="MPING" socket-binding="jgroups-mping"/>-->
       <protocol type="MERGE2"/>
       ...
   </stack>