Hello,

I'm trying to set up a several DMAs with external Elastic cluster. I set a necessary settings in DBConfiguration.xml

<DatabaseConfiguration>
<SearchConfiguration>
<ElasticConnections>
<ElasticCluster priorityOrder="0">
<Hosts>1.1.1.1,1.1.1.2,1.1.1.3</Hosts>
<Username />
<Password></Password>
<Prefix>dma_43201</Prefix>
<FileOffloadIdentifier>DM_Cluster</FileOffloadIdentifier>
</ElasticCluster>
</ElasticConnections>
</SearchConfiguration>
</DatabaseConfiguration>

After starting DMA I got a lot of errors like this :

2021/07/28 05:30:33.734|SLDBConnection|SLDataGateway.Repositories|INF|0|1|2021-07-28T05:30:33.724|DEBUG|DataGateway.Storage.Elastic.LogEntry (elastic_log_entry)|CreateIndexTemplateIfNotExists - Attempt 1/10 failed with exception: Elasticsearch.Net.ElasticsearchClientException: The remote server returned an error: (400) Bad Request.. Call: Status code 400 from: PUT /_template/dma_43201-logentries. ServerError: Type: mapper_parsing_exception Reason: "Failed to parse mapping [_doc]: Root mapping definition has unsupported parameters: [indexhelper : {dynamic=true, dynamic_templates=[{stringfield={mapping={type=keyword, fields={search={fielddata=false, analyzer=SLSearch_analyzer, type=text}, lower={normalizer=SLSearch_normalizer, type=keyword}, lowerwhitespace={fielddata=false, analyzer=whitespace_lower, type=text}}}, match_mapping_type=string}}, {doublefield={mapping={type=double}, match_mapping_type=double}}, {longfield={mapping={type=long}, match_mapping_type=long}}]}]" CausedBy: "Type: mapper_parsing_exception Reason: "Root mapping definition has unsupported parameters: [indexhelper : {dynamic=true, dynamic_templates=[{stringfield={mapping={type=keyword, fields={search={fielddata=false, analyzer=SLSearch_analyzer, type=text}, lower={normalizer=SLSearch_normalizer, type=keyword}, lowerwhitespace={fielddata=false, analyzer=whitespace_lower, type=text}}}, match_mapping_type=string}}, {doublefield={mapping={type=double}, match_mapping_type=double}}, {longfield={mapping={type=long}, match_mapping_type=long}}]}]"" ---> System.Net.WebException: The remote server returned an error: (400) Bad Request.
at System.Net.HttpWebRequest.GetResponse()
at Elasticsearch.Net.HttpWebRequestConnection.Request[TResponse](RequestData requestData)
--- End of inner exception stack trace -

I found that  "mapper_parsing_exception" might appear during to client/server incompatibility. Current version (7.13.4) of Elasticsearch doesn't support mapping types as described here https://www.elastic.co/guide/en/elasticsearch/reference/current/removal-of-types.html

So the questions is : which version of Elasticsearch compatible with DM (I tried 10.1.8)? Have you tested it with 7.13?