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.
The General Information page for the cluster opens.
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.
Specify a standard UDP port number in the range 2048–32000. The default is an automatically generated value in this range.
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.
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.
GlassFish Server does not define any additional properties for the GMS.
See Also
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