Site StandbyDb returned ORA-16664

The ORA-16664 occur4es in Data Guard log files as following:

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Site StandbyDb returned ORA-16664.
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Solution

a) Check both alert and data guard logs of primary database

b) Check both alert and data guard logs of standby database with following errors:

ORA-09925: Unable to create audit trail file
Linux-x86_64 Error: 28: No space left on device
Additional information: 9925

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OS Audit file could not be created; failing after 6 retries

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After cleaned the old audit files, then everything is fine.

DGMGRL> show database verbose "STANDBYDB";

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  Role:                    PHYSICAL STANDBY
  Intended State:          APPLY-ON
  Transport Lag:           0 seconds (computed 0 seconds ago)
  Apply Lag:               0 seconds (computed 1 second ago)
  Average Apply Rate:      4.38 MByte/s
  Active Apply Rate:       1.11 MByte/s
  Maximum Apply Rate:      46.39 MByte/s
..
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.
Database Status:
SUCCESS

DGMGRL>

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