ElasticSearch：mget即使工作也没有工作

Question

我试图直接使用http来使用_mget api：

curl -u elastic:changeme -XGET localhost:9200/index/_mget?pretty -d '
{
  "docs": [
    {
      "_type": "coll",
      "_id": "1474c1a0-2540-11e7-9271-0242ac110008"
    }
  ]
}
'

我得到了一个不存在的回复：

{
  "docs" : [
    {
      "_index" : "index",
      "_type" : "coll",
      "_id" : "1474c1a0-2540-11e7-9271-0242ac110008",
      "found" : false
    }
  ]
}

但是，我尝试使用get api：

来获取此文档

curl -u elastic:changeme -XGET localhost:9200/index/coll/1474c1a0-2540-11e7-9271-0242ac110008?pretty

我得到的回答是正确的：

{
  "_index" : "index",
  "_type" : "coll",
  "_id" : "1474c1a0-2540-11e7-9271-0242ac110008",
  "_version" : 1,
  "_routing" : "user",
  "found" : true,
  "_source" : {
    "user" : "user",
    "timestamp" : "2017-04-18T22:00:00Z",
    "startTimestamp" : "2017-04-18T22:00:00Z",
    "dueTimestamp" : null,
    "closingTimestamp" : null,
    "matter" : "Activity 16",
    "comment" : null,
    "status" : 20,
    "backlogStatus" : 20,
    "metainfos" : {
      "fbcbeacfbcbeacfbcbeacfbcbeacfbcbaeac" : [
        "Project A"
      ],
      "fceceacfcedeacfceeeacfcefeacfcfeac" : [
        "Example activity"
      ],
      "ffceacffceacffceacffceacffceac" : [
        "Marketing"
      ],
      "efeacefeacefeacefeacefeac" : [
        "2017-Q3"
      ],
      "ddfceacddfceacddfceacddfceacddfceac" : [
        "West"
      ],
      "eaaeaceabeaceaceaceadeaceaeeac" : [
        "2-Important - Not urgent"
      ],
      "eaceeaceaceeaceaceaeaceacebeaceaceceac" : [
        "4-Completed"
      ],
      "efeeeacefefeaceffeaceffeaceffeac" : [
        "Oliver"
      ]
    },
    "resources" : [ ],
    "notes" : null
  }
}

有什么想法吗？