Database upgrades, partial patch applications, or system crashes can leave internal dictionary objects or views (such as those prefixed with KU$_ ) in an invalid state. When the worker reads metadata, missing or invalid SYS packages cause an immediate unhandled exception. 3. Structural Constraints and Remapping Clashes
The Oracle error is a generic "catch-all" internal error during a Data Pump import ( impdp ). It typically indicates that a worker process encountered an unhandled exception while preparing data for insertion. Primary Causes
Caution : This will truncate (empty) existing tables before re-importing.
Review the export log for any errors that may have slipped through. A corrupted dump file will often lead to import errors.
Troubleshooting ORA-39126: Worker Unexpected Fatal Error in KUPW$WORKER.PREPARE_DATA_IMP [71] Review the export log for any errors that
If you are seeing the error during an Oracle Data Pump Import (IMPDP), specifically referencing KUPW$WORKER.PREPARE_DATA_IMP [71] , you have likely hit a snag in the metadata preparation phase. This error is a "catch-all" for unexpected internal worker failures, and the suffix [71] usually points to a specific issue with how the worker process is handling table data or partitioned objects. What Causes ORA-39126 (Internal Error 71)?
exec dbms_stats.gather_dictionary_stats; exec dbms_stats.gather_fixed_objects_stats; Use code with caution. Copied to clipboard 3. Targeted Exclusion
: Corruption within the Data Pump utility or the DBMS_METADATA package can prevent the worker from correctly interpreting the dump file.
If specific objects are causing the crash, you can bypass them to finish the rest of the import. Use code with caution.
This is an unhandled exception within the KUPW$WORKER PL/SQL package. Common Causes: Metadata inconsistencies in the export file.
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The ORA-39126 error is a generic Oracle internal error wrapper. When the Data Pump worker process encounters a condition it cannot handle, it raises this error along with a specific internal location (in this case, KUPW\$WORKER.PREPARE_DATA_IMP ) and an error code (71).
: Run a script like utlrp.sql to recompile any invalid system packages, particularly those owned by SYS or XDB . specifically referencing KUPW$WORKER.PREPARE_DATA_IMP [71]
If all else fails, return to the export step:
In this context, the "71" is an internal code location. It generally signals that the worker process was trying to query a metadata table or an internal work table to plan the next step of the import, but the expected record was missing or corrupted. Common Causes The most frequent culprits for this specific error include:
If the temporary tablespace is empty or incorrectly configured, internal sort/join operations during import preparation can fail. WordPress.com Recommended Solutions Gather Dictionary Statistics:
impdp ... TRANSFORM=LOB_STORAGE:BASICFILE TRANSFORM=SEGMENT_ATTRIBUTES:N