ORA-08102: index key not found obj# %s, file %s, block %s (%s)

I got ” ORA-08102: index key not found, obj# %s file %s, block %s (%s) ”  error in Oracle database.

ORA-08102: index key not found obj# %s, file %s, block %s (%s)

Details of error are as follows.

ORA-08102: index key not found, obj# %s, file %s, block %s (%s)

Cause: Internal error: possible inconsistency in index

Action: Send trace file to your customer support representative, along with information on reproducing the error

index key not found, obj# %s, file %s, block %s (%s)

This ORA-08102 error is related with the Internal error: possible inconsistency in index.

Send trace file to your customer support representative, along with information on reproducing the error.

The issue is caused by a corrupted index.

Rebuild the corrupted index using the following steps:

1. Connect to the database ‘as sysdba’.
2. Identify the affected index by executing the following query:

   select owner, object_name, subobject_name from DBA_OBJECTS where object_id=<object# reported in the original error>;

3. Rebuild the identified index:

   alter index <object_name returned from the query in Step 2> rebuild online;

If the Rebuild index don’t solve your error, then drop and recreated the index.

Do you want to learn Oracle Database for Beginners, then read the following articles.

Oracle Tutorial | Oracle Database Tutorials for Beginners ( Junior Oracle DBA )