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Warn when running a one-node cluster

Description

If clustering is enabled, but only one node is running, we should issue warnings.

Although every cluster node will briefly be a one-node cluster during start-up ( warnings should not be sent then), having a one node cluster implies that the expectation of having cluster benefits (redundancy, performance) are not met.

Openfire should

  • display a warning in the admin console, whenever the cluster is just one node

  • send out a message to all admins (akin to the messages send when plugin updates are available), when the cluster shrinks from multiple, to one node)

  • send out a recovery message to all admins, but only if a warning message was sent earlier (no need to 'recover' from a cluster that is simply starting up).

Environment

None

Acceptance Test - Entry

None
Fixed

Assignee

Greg Thomas

Reporter

Guus der Kinderen

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Priority

Major
Configure