[Solved]: low disk watermark [85%] exceeded, replicas will not be assigned to this node

Add the following lines to elasticsearch.yaml file (elasticsearch-6.3.1/config):

cluster.routing.allocation.disk.threshold_enabled: truecluster.routing.allocation.disk.watermark.low: 93%cluster.routing.allocation.disk.watermark.high: 95%

Also, make sure your watermark.high is less or equal to the flood watermark (it’s usually set to 95%)