Hi Ratnesh, 1. Hive 4.x is expected to support reading ACID tables created with Hive 3.x. Could you please share the exact error message or exception you are encountering? Make sure 'hive' user has access to the underlying data.
2. Are you using MR or query-based compaction? Have you checked the `show compactions` output? What is the state of compaction request? You can upgrade the Hive schema using the schematool: schemaTool -upgradeSchemaFrom / -upgradeSchema For more information, refer to the official documentation: https://hive.apache.org/docs/latest/284790216/ Regards, Denys
