I face with an issue of duplicating keys (logs throw by datahub-gms) because of lower and upper case. I believe that I already delete those cases in elasticsearch and mysql, but those errors are still there. I already using search api on elasticsearch and querying in mysql but didn't hit keys which throw by gms. Is data only stored in elasticsearch and mysql?

what version are you running? Adding stacktrace would be helpful. Otherwise people won't know what issue you are facing.

Hi @eager-answer-71364, we recently made a change to the MySQL collation so that keys with different cases are different rows in MySQL

I already fix it by myself. To load ui of any urns, datahub-gms need to call graph-service index (elasticsearch) to find the first-depth downstream. So I fixed it by delete graph-service in elasticsearch and re-create empty one to make it start ingest to elasticsearch. This document https://github.com/linkedin/datahub/blob/master/docs/rfc/active/2042-graphql_frontend/queries.md describe how it actually works. Thank. I also close issue by myself. Thanks.