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OrderThe Data Pump worker process had essentially walked into a room that was already full. The tablespace where the temporary import tables were being built had run out of space. Because it couldn't write the data it was preparing, the worker process crashed, triggering the generic ORA-39126 alert.
impdp ... PARALLEL=1 # or match CPU cores The Data Pump worker process had essentially walked
The error is a generic internal error in Oracle Data Pump that typically indicates an unhandled exception within the worker process during the data import preparation phase. Root Causes the worker process crashed
Once the likely cause is identified, several strategies can be employed: several strategies can be employed: :
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