Package com.hazelcast.cp

Interface CPMember

public interface CPMember
A CP member is a Hazelcast member that is internally elected to be part of the CPSubsystem, hence maintain CP data structures. If CPSubsystemConfig.getCPMemberCount() is configured to be N, first N members of the cluster are assigned as CP members during startup. After CP Subsystem is initialized, other Hazelcast members can be promoted to be a CP member via CPSubsystemManagementService.promoteToCPMember().
See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    Address
    getAddress()
    Returns the address of this CP member.
    UUID
    getUuid()
    Returns the UUID of this CP member.
    boolean
    isAutoStepDownWhenLeader()
    Returns whether this CP member is configured to automatically step down from leadership in non-metadata CP groups.

  • Method Details

    • getUuid

      UUID getUuid()
      Returns the UUID of this CP member. The CP member UUID does not have to be same with the UUID of the local member that is accessed via Cluster.getLocalMember().
      Returns:
      the UUID of this CP Member

    • getAddress

      Address getAddress()
      Returns the address of this CP member. It is same with the address of Cluster.getLocalMember()
      Returns:
      the address of this CP member

    • isAutoStepDownWhenLeader

      boolean isAutoStepDownWhenLeader()
      Returns whether this CP member is configured to automatically step down from leadership in non-metadata CP groups.

      If true, whenever this member is elected leader, it will suspend replication, immediately trigger a leadership transfer, and resume normal operation once a leader-capable member takes over. Client operations are retried transparently and eventually succeed under the new leader.

      When this flag is enabled, the member's effective priority is treated as Integer.MIN_VALUE to prevent leader rebalancing from assigning leadership to a node that would immediately step down.

      This feature is useful when a node has high latency to the rest of the CP group, where holding leadership could destabilize replication. A brief unavailability window may occur during the leadership transfer, proportional to the RTT and log catch-up required for the target leader.

      Returns:
      true if this member automatically steps down from leadership
      Since:
      5.7