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

Sometimes the error is caused by a specific table. To find out which one, increase the logging detail: TRACE=480300 Use code with caution.

If the target database's Data Pump components or dependent XML/Metadata APIs ( SYS.DBMS_METADATA ) became corrupted during a database upgrade, power crash, or partial patch application, the worker process will fail when preparing the load configurations. 2. Missing or Misconfigured Temporary Tablespaces

ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PREPARE_DATA_IMP [71] — oracle-mosc

is a generic internal error in Oracle Data Pump that typically indicates an unhandled exception within a worker process. The specific code Sometimes the error is caused by a specific table

By following a structured diagnostic approach—isolating the problematic object, understanding the context of the failure, and applying the appropriate fix—you can successfully overcome ORA-39126 and ensure your Data Pump operations run smoothly.

Check the resulting trace files in your DIAGNOSTIC_DEST . Look for the last object processed before the "Fatal Error." You can then try running the import again while excluding that specific table: EXCLUDE=TABLE:"IN ('PROBLEM_TABLE_NAME')" Use code with caution. 5. Patching and Bug 27634993

After running this, recompile any remaining invalid objects using the utlrp.sql script. 2. Exclude Statistics Check the resulting trace files in your DIAGNOSTIC_DEST

The database objects that track Data Pump progress ( SYS views and internal packages like DBMS_METADATA or XDB ) may be invalid, missing, or corrupted.

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:

: This indicates that an unhandled exception occurred within a Data Pump worker process. It acts as a wrapper for underlying, more specific errors. and resolving this error.

This comprehensive technical guide breaks down why this crash happens and provides actionable steps to fix it. 🔍 Root Causes of the Error

This article provides a comprehensive guide to understanding, debugging, and resolving this error. 1. What Causes ORA-39126 in PREPARE_DATA_IMP?

Check for known bugs:

He checked the worker status. Terminated. The entire import job had stalled, frozen in a state of digital rigor mortis.