Hello 🙂 I've evolved a realtime table schema (renaming column) and seeing the following error when querying

[
  {
    "errorCode": 500,
    "message": "MergeResponseError:\nData schema mismatch between merged block: [eventTimeString(STRING),communityId(STRING),eventType(STRING),ibcustomer(STRING),newsId(STRING),timeString(STRING),userId(STRING)] and block to merge: [eventTimeString(STRING),communityId(STRING),ibcustomer(STRING),newsId(STRING),timeString(STRING),type(STRING),userId(STRING)], drop block to merge"
  }
]

I'm aware of

pinot.server.instance.reload.consumingSegment

setting - can you confirm setting it to

true

will solve this problem ? If so, maybe the error message should contain this bit of information ? or a reference to the doc ?

I think pinot only support backward compatible schema changes, which means delete a column is not supported.

Ah that makes sense Maybe we should prevent updating the schema in such a way then ? (fail early)

agreed

Oh great Mind sharing the issue / PR regarding this feature ?

also discussing the support for schema versioning

Thanks @Xiang Fu 🙂