Stefan Iliev 3b7f0aff92 ENT-3484 - Added periodic log.warn message to remind that the node has been set into draining mode. (#5151)
* Added periodic message logged from a timer which is switched on and off by the node drain events.

* Timer also spawns on start() to ensure that if a node is shutdown in draining mode and started with it, it will continue logging messages.
2019-06-03 13:49:29 +03:00
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