{
  "index": "NAME-2019.04.12",
  "shard": 1,
  "primary": false,
  "current_state": "unassigned",
  "unassigned_info": {
    "reason": "NODE_LEFT",
    "at": "2019-06-19T15:47:48.789Z",
    "details": "node_left[Qknhccf6RVKa2hKEnqmQWQ]",
    "last_allocation_status": "no_attempt"
  },
  "can_allocate": "throttled",
  "allocate_explanation": "allocation temporarily throttled",
  "node_allocation_decisions": [
    {
      "node_id": "Qknhccf6RVKa2hKEnqmQWQ",
      "node_name": "data-2",
      "transport_address": "10.2.11.97:9300",
      "node_attributes": {
        "ml.machine_memory": "67559424000",
        "ml.max_open_jobs": "20",
        "xpack.installed": "true",
        "ml.enabled": "true"
      },
      "node_decision": "throttled",
      "store": {
        "matching_sync_id": true
      },
      "deciders": [
        {
          "decider": "throttling",
          "decision": "THROTTLE",
          "explanation": "reached the limit of incoming shard recoveries [505], cluster setting [cluster.routing.allocation.node_concurrent_incoming_recoveries=500] (can also be set via [cluster.routing.allocation.node_concurrent_recoveries])"
        }
      ]
    },
    {
      "node_id": "3EwNzUIETTOl5bWlICuO3g",
      "node_name": "data-1",
      "transport_address": "10.2.11.90:9300",
      "node_attributes": {
        "ml.machine_memory": "67560030208",
        "ml.max_open_jobs": "20",
        "xpack.installed": "true",
        "ml.enabled": "true"
      },
      "node_decision": "no",
      "store": {
        "matching_sync_id": true
      },
      "deciders": [
        {
          "decider": "same_shard",
          "decision": "NO",
          "explanation": "the shard cannot be allocated to the same node on which a copy of the shard already exists [[squid-ufdbguardd-633-2019.04.12][1], node[3EwNzUIETTOl5bWlICuO3g], [P], s[STARTED], a[id=9G351qEVSPef2kUeHGvWLw]]"
        }
      ]
    }
  ]
}