Close Indices snapshot not being taken in ES 7.4.2

[Gaurav6141]

Hi,

I was trying to take snapshot of all indices but it looks like close indices are omitted from snapshot until specified explicitly with name.

This what I did. I created two indices and injected some dummy documents into them. And closed one index.

% curl localhost:9200/_cat/indices?v
health status index    uuid                   pri rep docs.count docs.deleted store.size pri.store.size
yellow close  twitter  cpSNr17-T4C952qjOncUZQ   3   2
yellow open   facebook ZlACnCrxTluRwHR40Q2kyQ   3   2          2            0      8.8kb          8.8kb

You can see that twitter index is closed but facebook is open.

Now I tried to create snapshot by following commands

% curl -X PUT "localhost:9200/_snapshot/my_backup/test_close2" -H 'Content-Type:    application/json' -d'
 {
"indices": "*"
 }'

and also by this:

curl -X PUT "localhost:9200/_snapshot/my_backup/snapshot_1?wait_for_completion=true&pretty"    

In both of the ways twitter index was not included in indices that were snapshotted

Proof:

% curl -X GET "localhost:9200/_snapshot/my_backup/test_close2?pretty"
 {
"snapshots" : [
{
  "snapshot" : "test_close2",
  "uuid" : "-zEn7E8-RqiHIQ5JB7S-Ug",
  "version_id" : 7040299,
  "version" : "7.4.2",
  "indices" : [
    "facebook"
  ],
  "include_global_state" : true,
  "state" : "SUCCESS",
  "start_time" : "2020-05-26T11:26:47.498Z",
  "start_time_in_millis" : 1590492407498,
  "end_time" : "2020-05-26T11:26:47.698Z",
  "end_time_in_millis" : 1590492407698,
  "duration_in_millis" : 200,
  "failures" : [ ],
  "shards" : {
    "total" : 3,
    "failed" : 0,
    "successful" : 3
  }
}
]
}

% curl -X GET "localhost:9200/_snapshot/my_backup/snapshot_1?pretty"
{
"snapshots" : [
{
  "snapshot" : "snapshot_1",
  "uuid" : "umRMmuKsQDycx9v-nCenEA",
  "version_id" : 7040299,
  "version" : "7.4.2",
  "indices" : [
    "facebook"
  ],
  "include_global_state" : true,
  "state" : "SUCCESS",
  "start_time" : "2020-05-26T11:16:14.258Z",
  "start_time_in_millis" : 1590491774258,
  "end_time" : "2020-05-26T11:16:14.258Z",
  "end_time_in_millis" : 1590491774258,
  "duration_in_millis" : 0,
  "failures" : [ ],
  "shards" : {
    "total" : 3,
    "failed" : 0,
    "successful" : 3
  }
}
]
}

From the above snapshots API response you can see that closed index twitter is not included in any of the above snapshot taken(test_close2 and snapshot_1)

But interestingly if we specifically add twitter(which the closed index) in the indices then snapshot is taken for that index

% curl -X PUT "localhost:9200/_snapshot/my_backup/test_close" -H 'Content-Type: application/json' -d'
 {
 "indices": "twitter"
}'

Snapshot GET API repsonse for the above snapshot:

curl -X GET "localhost:9200/_snapshot/my_backup/test_close?pretty"
{
  "snapshots" : [
    {
      "snapshot" : "test_close",
      "uuid" : "cekfChOsRlmqKQlWjs1dlw",
      "version_id" : 7040299,
      "version" : "7.4.2",
      "indices" : [
        "twitter"
      ],
      "include_global_state" : true,
      "state" : "SUCCESS",
      "start_time" : "2020-05-26T11:18:45.115Z",
      "start_time_in_millis" : 1590491925115,
      "end_time" : "2020-05-26T11:18:45.316Z",
      "end_time_in_millis" : 1590491925316,
      "duration_in_millis" : 201,
      "failures" : [ ],
      "shards" : {
        "total" : 3,
        "failed" : 0,
        "successful" : 3
      }
    }
  ]
}

You can find twitter index being snapshoted in test_close snapshot

I wanted to know is this expected behavior?
If yes, wont you think snapshot API should also include a parameter to specify that include close indices as well while taking snapshot

If there is already a way please let me know?

[Gaurav6141]

Any updates here?