How can I verify the health of the Oracle Streams capture process when encountering ora-32321?

You can verify the health of the Oracle Streams capture process by querying the `DBA_CAPTURE` view to check its status. Look at the `STATUS` and `ERROR` columns. Also, examine the trace files associated with the capture process, usually found in the diagnostic_dest directory, for detailed error information and the specific failure point, which will help diagnose the ora-32321 issue.