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To Configure the Group Management Service

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 cluster members.




In the navigation tree, expand the Configuration node.


Select the configuration for the cluster that you are changing.


Under the configuration's node, select the Group Management Service node.
The Group Management Service page opens.


In the Maximum Missed Heartbeats field, type the maximum number of missed heartbeats from a member before the GMS confirms that a failure is suspected.
The default is 3.


In the Heartbeat Frequency field, type the period of time between successive broadcasts of a group member's heartbeat.
The default is 2000 milliseconds.


In the Group Discovery Timeout field, type the amount of time that the GMS waits for discovery of other cluster members.
The default is 5000 milliseconds.


In the Failure Verification Wait Time field, type the amount of time to wait before verifying that a member that is suspected to have failed should be reported as failed.
The default is 1500 milliseconds.


To restore default values, click the Load Defaults button.


In the Additional Properties section, specify additional properties.


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 Group Management Service Settings for a Cluster





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