遇見這個問題多半是磁碟空間不足，可以通過一下操作可解決。

#修改叢集報警閾值
PUT _cluster/settings
   {
	  "transient": {
	     "cluster.routing.allocation.disk.watermark.low": "3gb",
	  "cluster.routing.allocation.disk.watermark.high": "1gb",
	  "cluster.routing.allocation.disk.watermark.flood_stage": "1gb",
	  "cluster.info.update.interval": "1m"
	     }
   }
 

# 新增寫許可權
PUT _settings
{
"index": {
"blocks": {
"read_only_allow_delete": "false"
        }
    }
}