Elastic.Transport.UnexpectedTransportException with Indices.GetAsync

[feherbbj]

Elastic.Clients.Elasticsearch version: 8.12.0

Elasticsearch version: 8.12.2

.NET runtime version: 8.0

Operating system version:

Description of the problem including expected versus actual behavior:
Try to use await client.Indices.GetAsync(....) and it throws
Elastic.Transport.UnexpectedTransportException : The JSON value could not be converted to System.Collections.Generic.ICollection`1[System.String]. Path: $.relations.entry | LineNumber: 0 | BytePositionInLine:

I have an index with a relation:
"mappings": {
"properties": {
.......
"parentChild": {
"type": "join",
"relations": {
"entry": "term"
}
},
.........

Expected behavior
Previously this does not throw any exception and based on the official web site, it is a valid relation still

[flobernd]

Hi @feherbbj,

just to clarify. Are you really using Elastic.Clients.Elasticsearch 8.12.0?

[feherbbj]

Yes, i started the migration in this march from 7.x and since there are parallel issue and our caode base is large. I still on 8.12.0. If the issue is fixed in later versions, i might consider upgrading.

[flobernd]

Thanks for the response. Yes, this looks like it is the same bug as in #7871 which meanwhile was fixed.

[feherbbj]

Thanks for the info