When doing a full import, avoid importing system schemas. Use the EXCLUDE parameter to skip these schemas in your impdp command:
Try adding ACCESS_METHOD=EXTERNAL_TABLE or ACCESS_METHOD=DIRECT_PATH.
ALTER SYSTEM SET PGA_AGGREGATE_TARGET=2G SCOPE=BOTH; When doing a full import, avoid importing system schemas
For older versions: Run @$ORACLE_HOME/rdbms/admin/catdp.sql .
is a generic "Worker unexpected fatal error" that occurs during Oracle Data Pump operations. The specific sub-program KUPW$WORKER.PREPARE_DATA_IMP [71] typically points to an internal failure while the worker is preparing to import data rows into a table. Primary Causes & Solutions is a generic "Worker unexpected fatal error" that
Run the dpload.sql script in the container/pluggable database where the import is failing: sqlplus / as sysdba @dpload.sql Use code with caution. Recompile invalid objects: @utlrp.sql Use code with caution. Solution 2: Exclude Table Statistics
Based on the analysis above, here is a tiered strategy to resolve the error, ranging from simple workarounds to permanent fixes. Recompile invalid objects: @utlrp
If the error happens during tablespace mapping, ensure that the schemas you are importing have the necessary quotas on the target tablespaces and that the REMAP_TABLESPACE parameter is used if the source and target tablespace names differ. 4. Summary Checklist Fix corrupted SYS.KUPW$WORKER objects. Use EXCLUDE=STATISTICS Skip corrupted TABLE_STATISTICS objects. Check Data Pump Jobs Drop hung/failed jobs in dba_datapump_jobs . Check Data Version Ensure target version is ≥ source version.
Now came the moment of truth. You can't just "resume" a dead worker. He had to restart the job, but thankfully, Data Pump is smart. Because he had used the REUSE_DUMPFILE parameter and the job had failed, he knew the master table would allow him to restart from a checkpoint if he attached to the job—or, more safely, simply restart the import command to let it reconcile the partial data.
Physical corruption of the .dmp file or file system issues can cause the worker to abort when trying to read the data.
The Oracle Data Pump error is a critical, generic unhandled internal exception that occurs during the initialization phase of a Data Pump import ( impdp ) job. It indicates that the internal Data Pump worker process ( KUPW$WORKER ) crashed while executing the PREPARE_DATA_IMP module. The number [71] acts as a specific positional or state marker within the Oracle kernel code, pointing to data structure validation or target metadata generation.