License expiration metric returns faulty value

Expected behavior

The metric com.hivemq.license.days-till-expire is expected to show the number of days for which the loaded license will remain valid.

Observed behavior

In affected versions, the metric will return the value -1 one hour after the broker has started and continue to return this erroneous value thereafter.

Affected Version

• HiveMQ 4.11.0

• HiveMQ 4.12.0

Solution / Workaround

Upgrade HiveMQ to a version released after 4.12.0. Later version are no longer affected.