curl -X GET "localhost:9200/_tasks/9xlnsmkETI-wUrbw6W3Xfw:3328166157?pretty"
{
  "completed" : false,
  "task" : {
    "node" : "9xlnsmkETI-wUrbw6W3Xfw",
    "id" : 3328166157,
    "type" : "transport",
    "action" : "indices:data/write/reindex",
    "status" : {
      "total" : 158238471,
      "updated" : 0,
      "created" : 64849000,
      "deleted" : 0,
      "batches" : 64849,
      "version_conflicts" : 0,
      "noops" : 0,
      "retries" : {
        "bulk" : 1,
        "search" : 0
      },
      "throttled_millis" : 0,
      "requests_per_second" : -1.0,
      "throttled_until_millis" : 0
    },
    "description" : "reindex from [asahab006875bb28445bb4e6a63d02c3a03d_osbasahfaroinfo_activities_2.9.0] to [asahab006875bb28445bb4e6a63d02c3a03d_osbasahfaroinfo_activities_3.3.4][_doc]",
    "start_time_in_millis" : 1660951174606,
    "running_time_in_nanos" : 586774963640789,
    "cancellable" : true,
    "headers" : { }
  }
}