The worker process requires enough Program Global Area (PGA) to prepare data, especially for large rows, LOBs, or row batches. If PGA_AGGREGATE_TARGET is too low, the worker may abort.
: Specific versions of Oracle have known bugs (e.g., bug 28307854) that cause ORA-39126 when importing package bodies or certain metadata. Oracle Forums Common Solutions and Workarounds To resolve this error, try the following steps in order: The worker process requires enough Program Global Area
Run impdp with the INCLUDE=TABLE_DATA parameter to isolate data loading, and capture full error: Oracle Forums Common Solutions and Workarounds To resolve
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He realized what had happened. A developer had dropped a temporary table on the source system exactly as the export began, leaving a ghost entry in the export dump. The import worker reached for the ghost, found nothing, and panicked.
If the problem relates to storage or segments: