Use the Group Management Service page to change GMS settings.
The Group Management Service (GMS) is an in-process service that provides cluster monitoring, cluster membership, and group communication services. The GMS is built atop a configurable stack of group membership discovery and health monitoring protocols. 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.
The Group Management Service page contains the following options.
Button to restore settings that have default values to their default values. Settings that do not have default values are not changed.
The name of the configuration to which the settings on this page apply. This field is read only.
The number of missed heartbeats from a member after which a server instance failure is suspected. The default is 3.
The period of time between missed heartbeats from a member. The default is 2000 milliseconds.
The amount of time that the GMS waits for discovery of other cluster members. The default is 5000 milliseconds.
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.
A table of additional properties for the Group Management Service.
GlassFish Server does not define any additional GMS properties.
For each property, the following information is displayed:
The name of the property.
The value that of the property that is set for the selected instance.
A textual description that provides more information about the property.
The Additional Properties table also contains the following options.
Button to add a property. Clicking this button adds a row to the Additional Properties table.
Button to delete one or more selected properties. Any property that is deleted reverts to its default value or, if no default value is set, is undefined.