Yannick Welsch 1c59c7e349 Log warning if minimum_master_nodes is set to less than a quorum of master-eligible nodes (#15625)
The setting minimum_master_nodes is crucial to avoid split brains in a cluster. In order to avoid data loss, it should always be configured to at least a quorum (majority) of master-eligible nodes.

This commit adds a warning to the logs on the master node if the value is set to less than quorum of master-eligible nodes.
2016-05-25 16:49:08 +02:00
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