Unable to configure eager fielddata loading for _timestamp field via PUT mapping API for type with existing mapping

[shikhar]

When creating a new index, if I have eager fielddata loading configured for the _timestamp field, that sticks.

However when updating this setting via the PUT mapping API, although the request is acknowledged when I check the mapping via GET, fielddata configuration for that field is blank.

I have been able to successfully configure it for other fields via the PUT mapping API, though. Seems like this problem may be specific to the special underscore-prefixed fields, though I've only really tried _timestamp.

[clintongormley]

Hi @shikhar

What version are you using? Also, could you provide a small curl recreation of the problem?

thanks

[shikhar]

curl -XPOST localhost:9200/test -d '{
    "settings" : {
        "number_of_shards" : 1
    },
    "mappings" : {
        "type1" : {
            "_timestamp" : { "enabled" : true },
            "properties" : {
                "field1" : { "type" : "string", "index" : "not_analyzed" }
            }
        }
    }
}'

curl -XPUT 'localhost:9200/test/type1/_mapping' -d '{                                                                                                            
        "type1" : {
            "_timestamp" : { "enabled" : true, "fielddata": { "loading": "eager" } },
            "properties" : {
                "field1" : { "type" : "string", "index" : "not_analyzed", "fielddata": { "loading": "eager" } }
            }
        }
    }'

acknowledged: true

but:

curl -XGET 'localhost:9200/test/type1/_mapping?pretty=true'
{
  "test" : {
    "mappings" : {
      "type1" : {
        "_timestamp" : {
          "enabled" : true
        },
        "properties" : {
          "field1" : {
            "type" : "string",
            "index" : "not_analyzed",
            "fielddata" : {
              "loading" : "eager"
            }
          }
        }
      }
    }
  }
}

[shikhar]

forgot to mention, this is on ES 1.3.0

[brwe]

The fielddata settings are not merged when the mapping is updated (https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/index/mapper/internal/TimestampFieldMapper.java#L280). This is similar to issue #777 and #5772. I will go through all the different root mappers and fix one by one, just have not gotten further than _ttl (#7316) yet.