ORA-27369: job EXECUTABLE failed with exit code:The storage control blocks were destroyed

Hi, Everybody.

Who has  found out the issues as fellows:

# ADDITIONAL_INFO:

    EXTERNAL_LOG_ID="job_265297_744068",ORA-27369: job EXECUTABLE failed with exit code:The storage control blocks were destroyed

# ERRORS:

    Invalid username or password

And my scheduler job code as  below:

1. SET termout ON
2. PROMPT
3. PROMPT  RECOMPILE TIER22
4. PROMPT
5. begin
6. dbms_utility.compile_schema('TIER22', false);
7. end;
8. /
9. PROMPT
10. PROMPT  Delete existing Backup-Job and Credentials
11. PROMPT
12. begin
13.   dbms_scheduler.drop_job(job_name => 'DAILY_CREATE_BACKUP');
14.   dbms_scheduler.drop_job(job_name => 'WEEKLY_CLEANUP');
15.   dbms_credential.drop_credential('T2_OS_CREDENTIAL');
16.   dbms_credential.drop_credential('T2_DB_CREDENTIAL');
17. end;
18. /
19. PROMPT