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To Configure Group Management Service Settings for a Cluster
The Group Management Service (GMS) is an in-process service that provides cluster monitoring,
cluster membership, and group communication services. The GMS performs the following functions:


Notifies registered modules in a GlassFish Server instance when one or more member instances are added to or removed from a cluster, or are suspected or confirmed to have failed.


Provides the ability to send and receive messages between a group of processes.



In the navigation tree, expand the Clusters node.
Select the cluster for which you are configuring Group Management Service (GMS) settings.
The General Information page for the cluster opens.
Select the GMS Enabled checkbox to enable the GMS for the cluster.
This option is selected by default. To disable the GMS for the cluster,
remove the check from the GMS Enabled checkbox.
If enabled, the Group Management Service is started in each server instance in
the cluster and in the Domain Administration Server (DAS). The DAS participates in
each cluster that has GMS enabled.
In the Multicast Port field, enter the port the Group Management Service uses
to listen for group events.
Specify a standard UDP port number in the range 2048–32000. The default is an
automatically generated value in this range.
In the Multicast Address field, enter the address the Group Management Service uses
to listen for group events.
Specify a class D IP multicast address. Class D IP addresses are in
the range 224.0.0.0 to 239.255.255.255, inclusive. The address 224.0.0.0 is reserved and should
not be used. The default is 228.9.XX.YY, where XX and YY are automatically
generated independent values between 0 and 255.
In the Bind Interface Address field, enter the network interface address for the
Group Management Service if there is more than one network interface.
This setting enables you to configure which network interface is used for the
GMS if there is more than one on any of the machines hosting
the server instances in the cluster. This value must be a local network
interface IP address. By default all public network interface addresses are used.
To specify an address that is valid for all GlassFish Server instances in
the cluster, use a system property to set the address individually for each
instance.
For example, create the system property GMS-BIND-INTERFACE-ADDRESS-cluster-name on the DAS. Then set
this Bind Interface Address option to ${GMS-BIND-INTERFACE-ADDRESS-cluster-name} to specify the system property. Finally, for
each instance in the cluster, set the GMS-BIND-INTERFACE-ADDRESS-cluster-name system property to the
required network interface address on the instance's machine.
(Optional) To specify additional properties, select the Properties tab and the Cluster Properties sub-tab.
GlassFish Server does not define any additional properties for the GMS.

To add a property, click the Add Property button. In the blank row
that appears, type the property name in the Name field, and type the
property value in the Value field.
To modify a property, edit that property's Value field.
To delete a property, select the checkbox to the left of the Name
field of the property that you are deleting, then click the Delete Properties
button.
Click Save.
See Also
To Enable the Group Management Service


To Configure the Group Management Service




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