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

"ORA-39126: Worker unexpected fatal error in KUPW-WORKER.PREPARE-DATA-IMP 71"

The error occurs during an Oracle Data Pump import operation (using impdp ). It indicates that a worker process encountered a critical, unexpected failure while preparing to load data into a table or partition.

Regenerate Statistics

Refreshing the dictionary and fixed object statistics often clears internal metadata mismatches: EXEC DBMS_STATS.GATHER_DICTIONARY_STATS; EXEC DBMS_STATS.GATHER_FIXED_OBJECTS_STATS; "ORA-39126: Worker unexpected fatal error in KUPW-WORKER

Solution 4: Use SQL_FILE to Generate DDL Instead of Direct Import

  1. Insufficient System Resources: The system may not have sufficient resources, such as memory or CPU, to handle the import operation.
  2. Data Corruptions: Data corruptions or inconsistencies in the export file can cause the worker process to fail.
  3. Database Configuration Issues: Incorrect database configuration, such as inadequate temporary space or incorrect character set settings, can lead to the ORA-39126 error.
  4. Import Parameter Settings: Incorrect import parameter settings, such as insufficient memory allocation or incorrect data type mappings, can cause the error.