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

Running the import as SYSDBA rather than a standard user with DATAPUMP_IMP_FULL_DATABASE privileges can lead to unexpected behavior.

If the Data Pump internal packages (like KUPW$WORKER ) or the database catalog are invalid or out of sync, workers will fail.

The error is an internal exception within the Oracle Data Pump (impdp) utility. It occurs when a worker process encounters an unhandled state while preparing data for import, often leading to a premature job termination. Common Causes Running the import as SYSDBA rather than a

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

-- For Container Databases (CDB), ensure all PDBs are open first ALTER PLUGGABLE DATABASE ALL OPEN; -- Run the script from the rdbms/admin directory @?/rdbms/admin/dpload.sql Use code with caution. It occurs when a worker process encounters an

If the issue is caused by a corrupt Data Pump catalog, you can re-register the components by running the dpload.sql script as a SYSDBA user:

Attempting to import system-related schemas (like SYSMAN ) across different Oracle versions (e.g., 11g to 12c) often triggers internal preparation errors. Troubleshooting and Resolution Steps 1. Rebuild Data Pump Metadata If the issue is caused by a corrupt

This specific error is frequently linked to metadata inconsistencies or environment-specific bugs:

After running this, recompile any remaining invalid objects using the utlrp.sql script. 2. Exclude Statistics