Ora-39126 Worker Unexpected Fatal Error In Kupw-worker.prepare-data-imp 71 _top_ ◉

Stale or corrupt optimizer statistics in the source dump file can cause the worker to crash during the preparation phase.

can trigger unexpected behavior or performance issues; it is recommended to use a user with the DATAPUMP_IMP_FULL_DATABASE role instead. Metadata Corruption : The Data Pump packages or required views (like SYS.DBMS_METADATA ) might be invalid or missing. Version Mismatch Stale or corrupt optimizer statistics in the source

To troubleshoot the ORA-39126 error, it's essential to understand the underlying causes. Some common causes include: Stale or corrupt optimizer statistics in the source

ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PREPARE_DATA_IMP [71] Stale or corrupt optimizer statistics in the source

You will likely see an underlying ORA-XXXXX . Common examples: