ORA-00704: bootstrap process failure; ORA-03171: Recovery was terminated during query execution

[oracle@qpaystddb ~]$
[oracle@qpaystddb ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Sun Jul 15 12:55:40 2018

Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to an idle instance.

SQL>
SQL> startup mount;
ORACLE instance started.

Total System Global Area 4.0353E+10 bytes
Fixed Size 2261928 bytes
Variable Size 1.9730E+10 bytes
Database Buffers 2.0535E+10 bytes
Redo Buffers 85204992 bytes
Database mounted.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 1
ORA-03171: Recovery was terminated during query execution
Process ID: 20598
Session ID: 198 Serial number: 3


Solution
=================
startup mount
recover managed standby database disconnect
-- Let managed recovery apply a few logs
recover managed standby database cancel;
alter database open;