co.elastic.clients.util.MissingRequiredPropertyException: Missing required property 'PatternTokenizer.flags'

[grib0]

Java API client version

7.17.2

Java version

17

Elasticsearch Version

7.17.0

Problem description

Using the java client api, I'm unable to create an index with a this mapping

    "settings": {
        "analysis": {
            "tokenizer": {
                "espaceTiretTokenizer": {
                    "type": "pattern",
                    "pattern": "[\\s,/\\\\-]+"
                }
            }
        }
    }
}

elasticsearchClient.indices()
            .create(c -> c.index(adresseIndex)
            .withJson("settings loaded here")

I got :
co.elastic.clients.util.MissingRequiredPropertyException: Missing required property 'PatternTokenizer.flags'

Trying to add
ApiTypeHelper.DANGEROUS_disableRequiredPropertiesCheck(true); as explained in the doc https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/7.17/missing-required-property.html results in
java.lang.NullPointerException: Cannot invoke "java.lang.Integer.intValue()" because the return value of "co.elastic.clients.util.ApiTypeHelper.requireNonNull(Object, Object, String)" is null

The workaround is to add the 2 properties flags and group but this properties should be optional

[l-trotta]

Hello and thanks for the report! This is an API specification issue, and you are right, those properties should be optional, in fact they are in the most recent version of the 8.X client. We will apply the fix to 7.17 too, then the java client will be updated to solve this issue.

[l-trotta]

fixed with #759 , the issue will be solved in the next release.