Java Client 8.17.3 cannot parse response from server 8.17.3

[sothawo]

Java API client version

8.17.3

Java version

openjdk 17.0.14 2025-01-21 LTS

Elasticsearch Version

8.17.3

Problem description

I just wanted to upgrade spring-data-elasticsearch to use the Elasticsearch client 8.17.3 (coming from 8.17.2).

When running the integration tests I have failures:

org.springframework.dao.DataAccessResourceFailureException: node: http://localhost:54640/, status: 200, [es/indices.get] Failed to decode response

	at org.springframework.data.elasticsearch.client.elc.ElasticsearchExceptionTranslator.translateExceptionIfPossible(ElasticsearchExceptionTranslator.java:111)
	at org.springframework.data.elasticsearch.client.elc.ElasticsearchExceptionTranslator.translateException(ElasticsearchExceptionTranslator.java:65)
	at org.springframework.data.elasticsearch.client.elc.ChildTemplate.execute(ChildTemplate.java:73)
	at org.springframework.data.elasticsearch.client.elc.IndicesTemplate.getInformation(IndicesTemplate.java:436)
	at org.springframework.data.elasticsearch.core.IndexOperations.getInformation(IndexOperations.java:414)
	at org.springframework.data.elasticsearch.core.index.IndexOperationsIntegrationTests.shouldReturnInformationList(IndexOperationsIntegrationTests.java:89)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
Caused by: java.lang.RuntimeException: node: http://localhost:54640/, status: 200, [es/indices.get] Failed to decode response
	at org.springframework.data.elasticsearch.client.elc.ElasticsearchExceptionTranslator.translateException(ElasticsearchExceptionTranslator.java:64)
	... 7 more
Caused by: co.elastic.clients.transport.TransportException: node: http://localhost:54640/, status: 200, [es/indices.get] Failed to decode response
	at co.elastic.clients.transport.ElasticsearchTransportBase.decodeTransportResponse(ElasticsearchTransportBase.java:409)
	at co.elastic.clients.transport.ElasticsearchTransportBase.getApiResponse(ElasticsearchTransportBase.java:367)
	at co.elastic.clients.transport.ElasticsearchTransportBase.performRequest(ElasticsearchTransportBase.java:148)
	at co.elastic.clients.elasticsearch.indices.ElasticsearchIndicesClient.get(ElasticsearchIndicesClient.java:1625)
	at org.springframework.data.elasticsearch.client.elc.IndicesTemplate.lambda$getInformation$22(IndicesTemplate.java:436)
	at org.springframework.data.elasticsearch.client.elc.ChildTemplate.execute(ChildTemplate.java:71)
	... 6 more
Caused by: co.elastic.clients.json.JsonpMappingException: Error deserializing co.elastic.clients.elasticsearch.indices.MappingLimitSettingsSourceFields: Invalid enum 'STORED' (JSON path: ['integration-46-719347'].defaults.index.mapping.source.mode) (line no=1, column no=1877, offset=-1)
	at co.elastic.clients.json.JsonEnums$Deserializer.deserialize(JsonEnums.java:84)
	at co.elastic.clients.json.JsonEnums$Deserializer.deserialize(JsonEnums.java:70)
	at co.elastic.clients.json.JsonEnum$Deserializer.deserialize(JsonEnum.java:46)
	at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:77)
	at co.elastic.clients.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:78)
	at co.elastic.clients.json.ObjectDeserializer.deserializeInner(ObjectDeserializer.java:214)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:166)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:157)
	at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:77)
	at co.elastic.clients.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:79)
	at co.elastic.clients.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:43)
	at co.elastic.clients.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:78)
	at co.elastic.clients.json.ObjectDeserializer.deserializeInner(ObjectDeserializer.java:214)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:166)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:157)
	at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:77)
	at co.elastic.clients.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:79)
	at co.elastic.clients.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:43)
	at co.elastic.clients.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:78)
	at co.elastic.clients.json.ObjectDeserializer.deserializeInner(ObjectDeserializer.java:214)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:166)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:157)
	at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:77)
	at co.elastic.clients.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:79)
	at co.elastic.clients.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:43)
	at co.elastic.clients.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:78)
	at co.elastic.clients.json.ObjectDeserializer.deserializeInner(ObjectDeserializer.java:214)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:166)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:157)
	at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:77)
	at co.elastic.clients.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:79)
	at co.elastic.clients.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:43)
	at co.elastic.clients.json.ObjectDeserializer$FieldObjectDeserializer.deserialize(ObjectDeserializer.java:78)
	at co.elastic.clients.json.ObjectDeserializer.deserializeInner(ObjectDeserializer.java:214)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:166)
	at co.elastic.clients.json.ObjectDeserializer.deserialize(ObjectDeserializer.java:157)
	at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:77)
	at co.elastic.clients.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:79)
	at co.elastic.clients.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:43)
	at co.elastic.clients.json.JsonpDeserializerBase$StringMapDeserializer.deserialize(JsonpDeserializerBase.java:349)
	at co.elastic.clients.json.JsonpDeserializerBase$StringMapDeserializer.deserialize(JsonpDeserializerBase.java:333)
	at co.elastic.clients.elasticsearch.indices.GetIndicesSettingsResponse.lambda$createGetIndicesSettingsResponseDeserializer$0(GetIndicesSettingsResponse.java:186)
	at co.elastic.clients.json.JsonpDeserializer$3.deserialize(JsonpDeserializer.java:136)
	at co.elastic.clients.json.JsonpDeserializer.deserialize(JsonpDeserializer.java:77)
	at co.elastic.clients.transport.ElasticsearchTransportBase.decodeTransportResponse(ElasticsearchTransportBase.java:404)

This seems to come from the change in 8.17.3 where the capitalization of the enum value was changed in the client:

[l-trotta]

Hello @sothawo, thanks for the report and sorry for the inconvenience, capitalization of that particular enum was changed from the API specification used to produce the clients code, and to account for that I merged a PR that made deserialization of enums case insensitive.... which was backported to 8.17 a couple days too late, and didn't make it in time for the release, my bad. 8.17.4 will be out soon and it will work properly!