Elasticsearch mappings generated differently for different deployments for my spring project

Question

In my spring project, I use annotations to define elasticsearch fields. As far as I understand, elasticsearch mappings are generated on startup of the app based on those annotations. However, mappings generated are different for different deployments.

I am running spring project with Java 8 and ElasticSearch 5.5.0.

Annotations:

@Size(min = MINIMUM_LENGTH_NAME, max = MAXIMUM_LENGTH_NAME)
@NotNull
@Column(name = "name", nullable = false)
@Field(store = Store.YES)
@Field(name = "name_forSort", normalizer = @Normalizer(definition = "lowercase"))
@SortableField(forField = "name_forSort")
private String name;

Expected mappings for name:

{
  "mappings": {
    "properties": {
      "name" : {
        "type" : "text",
        "store" : true
      },
      "name_forSort" : {
        "type" : "keyword",
        "norms" : true,
        "normalizer" : "lowercase"
      }
    }
  }
}

Mappings for the problematic deployment:

{
  "mappings": {
    "properties": {
       "name" : {
         "type" : "text",
         "fields" : {
           "keyword" : {
             "type" : "keyword",
             "ignore_above" : 256
           }
         }
       },
       "name_forSort" : {
         "type" : "text",
         "fields" : {
           "keyword" : {
             "type" : "keyword",
             "ignore_above" : 256
           }
         }
       },
    }
  }
}

Answer 1

The problem was solved by initiating a new ES instance followed by a reindex. It seems the weird mapping was caused by a previously failed reindex with corrupted data.