You can then manually gather statistics after the data has successfully imported.
EXEC DBMS_STATS.GATHER_DICTIONARY_STATS; EXEC DBMS_STATS.GATHER_FIXED_OBJECTS_STATS; Use code with caution. Copied to clipboard Rebuild Data Pump Utility:
If the error persists, the dump file is likely irrecoverably corrupted, and you will need to recreate it from the source. You can then manually gather statistics after the
Solution A: Rebuild Data Pump Packages (Most Likely Solution)
The ORA-39126 error, while appearing cryptic and fatal, is not a random failure. It is the worker process signaling a fundamental incompatibility or corruption that prevents it from safely preparing the data import. By understanding its context—within the PREPARE-DATA-IMP subroutine of the KUPW worker—a DBA can systematically diagnose whether the issue lies in dump file corruption, metadata inconsistency, version mismatch, or a known software bug. Resolution ranges from re-exporting data and applying patches to isolating problematic objects. Ultimately, disciplined preventive practices and a calm, methodical diagnostic approach transform this intimidating error from a showstopper into a solvable challenge. In the world of database administration, errors like ORA-39126 remind us that even robust utilities demand respect, understanding, and rigorous preparation. Solution A: Rebuild Data Pump Packages (Most Likely
If the error persists during the statistics processing phase, bypass it by adding the following parameter to your impdp command: EXCLUDE=STATISTICS
The ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PREPARE_DATA_IMP [71] is a classic example of an Oracle internal error that surfaces due to underlying environmental issues, bugs, or data corruption. It is not a death sentence for your database but rather a signal that the Data Pump’s internal consistency checks have been tripped. Preliminary Troubleshooting Steps
ALTER TABLESPACE temp ADD TEMPFILE '/new_path/temp02.dbf' SIZE 2G;
or complex XML structures can occasionally cause the worker to crash during the initial data mapping. Recommended Solutions
ORA-39126: Worker unexpected fatal error in KUPW ... - OraFAQ
Corrupted table statistics in the dump file ( TABLE_STATISTICS ) can trigger this, especially if EXCLUDE=STATISTICS is not used. 2. Preliminary Troubleshooting Steps