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The KUPW$WORKER.PREPARE_DATA_IMP package body is responsible for mapping tablespaces, auditing schemas, and setting up the metadata before actual data loading. The fatal error 71 frequently stems from:
Determine exactly what object Data Pump was processing when the crash occurred. Run the import utility with the TRACE parameter enabled to get an exact visual of the pipeline:
Ensure the user executing the Data Pump job has the DATAPUMP_EXP_FULL_DATABASE role for exports and the DATAPUMP_IMP_FULL_DATABASE role for imports. Additionally, verify that the user has direct object privileges (e.g., SELECT , EXECUTE ) on all objects within the job's scope, including those referenced in views, procedures, or other PL/SQL code.
References: Oracle Documentation (Doc ID 2472847.1), Community Resolutions, and Bug Fix Analysis.
The ORA-39126 error typically manifests in the following ways: The KUPW$WORKER
Prevention is better than cure. Implement the following strategies to minimize the risk of encountering this error in Data Pump jobs:
impdp ... table_exists_action=truncate
Corrupt statistics can cause the worker to miscalculate data preparation. Run the following as SYSDBA:
Physical corruption of the .dmp file or file system issues can cause the worker to abort when trying to read the data. Additionally, verify that the user has direct object
Oracle Bug 27155601, Bug 31145156, and similar internal bugs related to object types, partitioning, or virtual columns are notorious for triggering ORA-39126 at line or block 71. Step-by-Step Troubleshooting Checklist
Certain versions of Oracle (notably in 12c, 19c, and 21c) have known bugs associated with how data is prepared, particularly with table statistics or specific data types.
: In a Multitenant environment, ensure all PDBs are open and run this from the CDB. 2. Refresh Dictionary Statistics
This error indicates that an unexpected exception occurred within the Data Pump worker process ( KUPW\$WORKER ) while preparing data for import (code 71 ). This article will break down the causes, provide actionable debugging steps, and outline solutions to get your import running again. 1. What is the ORA-39126 Error? Implement the following strategies to minimize the risk
Note: You can rebuild indexes manually after the data import completes successfully. Solution 2: Use the VERSION Parameter Explicitly
As the sun began to peek through the office blinds, the terminal finally displayed the words he’d been chasing all night: Job "SYS_IMPORT_FULL_01" successfully completed .
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