Watermark settings not working on opendistro 1.8

Open Source Elasticsearch and Kibana
1

Hello All,

Looking for help with respective to watermark settings. For some reason watermark settings are not working on the opendistro 1.8 elasticsearch cluster. The disk reaches even to 100%. Looking for any thoughts on how to get it working?

Here are the settings applied.

   {
  "persistent" : {
    "cluster" : {
      "routing" : {
        "allocation" : {
          "disk" : {
            "watermark" : {
              "low" : "85%",
              "flood_stage" : "95%",
              "high" : "90%"
            }
          }
        }
      }
    }
  },
  "transient" : { }
}