Get snapshots after upgrade Elasticsearch 2.4 to 5.6

[ruipoliveira (Rui Oliveira)]

I made the upgrade in my elasticsearch cluster 2.4 version to 5.6. (as described in elastic website). The upgrade occurred without issues, but now I needed check the snapshots available and receive the error:

curl -X GET "localhost:9200/_snapshot/es_logs/_all?pretty"

{
  "error" : {
    "root_cause" : [
      {
        "type" : "repository_exception",
        "reason" : "[es_logs] could not read repository data from index blob"
      }
    ],
    "type" : "repository_exception",
    "reason" : "[es_logs] could not read repository data from index blob",
    "caused_by" : {
      "type" : "access_denied_exception",
      "reason" : "/mnt/backup/elasticsearch/es_logs/pending-incompatible-snapshots-uMo3FaYxST6JFL_t8LOv8w"
    }
  },
  "status" : 500
}

I appreciate any suggestion or feedback to resolve my problem. Thank all.

In other cluster, I considered the same process for upgrade and not have same problem.