Ошибка ora 01033 oracle

Yesterday I installed Oracle 12c Enterprise edition on my laptop. When I tried to connect to DB via SQLPLUS i got the below error

C:\Users\USER>sqlplus

SQL*Plus: Release 12.1.0.2.0 Production on Sun Feb 28 14:12:46 2016

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

Enter user-name: userdb
Enter password:
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress
Process ID: 0
Session ID: 0 Serial number: 0

I tried all the tricks mentioned on internet but couldn’t get rid of this error.

I also tried below

SQL> shutdown immediate;
ORA-01109: database not open


Database dismounted.
ORACLE instance shut down.
SQL> startup;
ORACLE instance started.

Total System Global Area 1543503872 bytes
Fixed Size                  3045984 bytes
Variable Size             989857184 bytes
Database Buffers          536870912 bytes
Redo Buffers               13729792 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 10 - see DBWR trace file
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'

also tried below but still getting error’s

SQL> shutdown abort
ORACLE instance shut down.
SQL> startup nomount
ORACLE instance started.

Total System Global Area 1543503872 bytes
Fixed Size                  3045984 bytes
Variable Size             989857184 bytes
Database Buffers          536870912 bytes
Redo Buffers               13729792 bytes
SQL> alter database mount;

Database altered.

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01157: cannot identify/lock data file 10 - see DBWR trace file
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'


SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'
ORA-01157: cannot identify/lock data file 10 - see DBWR trace file
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'

Can someone help here? thanks!

asked Feb 28, 2016 at 19:41

Sarang's user avatar

2

I’ve had the same problem and just want to share my solution with you, if anybody else gets the ORA-01033: ORACLE initialization or shutdown in progress
Error in Oracle 12c Database. My database showed me the error everytime i tried to connect to a user of a sample schema (for ex. hr).

The following worked for me:

SQLPlus> connect sys as sysdba
SQLPlus> alter pluggable database all open; 

answered Apr 1, 2016 at 13:02

Nicola's user avatar

NicolaNicola

3851 gold badge5 silver badges15 bronze badges

0

The only solution to this issue is :
drop the database datafile which you are getting in error , for your case «data file 10» .

SQL> alter database datafile 16 OFFLINE DROP;
Database altered.

SQL> alter database open;
Database altered.

It worked for me.

answered Apr 19 at 6:28

Soumyaranjan Dalai's user avatar

I had the same error and i solve it.
In fact the problem that you got is due to a changement in the destination of one or few datafiles.
In your case is the datafile 10.In fact the error is:

SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-01110: data file 10:
**strong text**'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'**strong text**
ORA-01157: cannot identify/lock data file 10 - see DBWR trace file
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF' 

The solution is to search this datafile in your hard drive an make it in the same directory used by oracle which is in your case : C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF

Mention that you should do this for all datafile that you have changed its directories.I wish this will be helpful.

OznOg's user avatar

OznOg

4,4402 gold badges26 silver badges35 bronze badges

answered Oct 29, 2017 at 15:13

explorateur's user avatar

Yesterday I installed Oracle 12c Enterprise edition on my laptop. When I tried to connect to DB via SQLPLUS i got the below error

C:\Users\USER>sqlplus

SQL*Plus: Release 12.1.0.2.0 Production on Sun Feb 28 14:12:46 2016

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

Enter user-name: userdb
Enter password:
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress
Process ID: 0
Session ID: 0 Serial number: 0

I tried all the tricks mentioned on internet but couldn’t get rid of this error.

I also tried below

SQL> shutdown immediate;
ORA-01109: database not open


Database dismounted.
ORACLE instance shut down.
SQL> startup;
ORACLE instance started.

Total System Global Area 1543503872 bytes
Fixed Size                  3045984 bytes
Variable Size             989857184 bytes
Database Buffers          536870912 bytes
Redo Buffers               13729792 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 10 - see DBWR trace file
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'

also tried below but still getting error’s

SQL> shutdown abort
ORACLE instance shut down.
SQL> startup nomount
ORACLE instance started.

Total System Global Area 1543503872 bytes
Fixed Size                  3045984 bytes
Variable Size             989857184 bytes
Database Buffers          536870912 bytes
Redo Buffers               13729792 bytes
SQL> alter database mount;

Database altered.

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01157: cannot identify/lock data file 10 - see DBWR trace file
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'


SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'
ORA-01157: cannot identify/lock data file 10 - see DBWR trace file
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'

Can someone help here? thanks!

asked Feb 28, 2016 at 19:41

Sarang's user avatar

2

I’ve had the same problem and just want to share my solution with you, if anybody else gets the ORA-01033: ORACLE initialization or shutdown in progress
Error in Oracle 12c Database. My database showed me the error everytime i tried to connect to a user of a sample schema (for ex. hr).

The following worked for me:

SQLPlus> connect sys as sysdba
SQLPlus> alter pluggable database all open; 

answered Apr 1, 2016 at 13:02

Nicola's user avatar

NicolaNicola

3851 gold badge5 silver badges15 bronze badges

0

The only solution to this issue is :
drop the database datafile which you are getting in error , for your case «data file 10» .

SQL> alter database datafile 16 OFFLINE DROP;
Database altered.

SQL> alter database open;
Database altered.

It worked for me.

answered Apr 19 at 6:28

Soumyaranjan Dalai's user avatar

I had the same error and i solve it.
In fact the problem that you got is due to a changement in the destination of one or few datafiles.
In your case is the datafile 10.In fact the error is:

SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-01110: data file 10:
**strong text**'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF'**strong text**
ORA-01157: cannot identify/lock data file 10 - see DBWR trace file
ORA-01110: data file 10:
'C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF' 

The solution is to search this datafile in your hard drive an make it in the same directory used by oracle which is in your case : C:\ORACLEDB12C\APP\USERNAME\ORADATA\ORCL\PDBORCL\EXAMPLE01.DBF

Mention that you should do this for all datafile that you have changed its directories.I wish this will be helpful.

OznOg's user avatar

OznOg

4,4402 gold badges26 silver badges35 bronze badges

answered Oct 29, 2017 at 15:13

explorateur's user avatar

You are here means you are facing “ora-01033 oracle initialization or shutdown in progress” error while trying to login into the Oracle database. A few days ago I faced the same issue and here are the steps that I have followed to troubleshoot which helped me login into the database successfully.

This article will help you understand the error message, possible causes, and their solutions. So without wasting time, let’s start digging into the error message.

What does “ora-01033 oracle initialization or shutdown in progress” error mean?

The error message is very clear and explains that the Oracle initialization or shutdown process is in progress, hence we cannot perform any other action on the database till initialization/shutdown is in progress. After completion of either initialization or shutdown, you will be able to perform the required action on the database.

There are following five reasons that may result in the error message and the steps you need to follow in order to fix the error.

1. The database is in the middle of starting or shutdown process

Reason:

If you have just started or shut down the database and executed a new command then you may end up receiving “ora-01033 oracle initialization or shutdown in progress” error message as already some process is going on and you are trying to execute a new command.

Solution:

Wait for the process to complete. Sometimes starting or shutdown down the database may take some time due to system performance or some processes are used in another application. If you still facing the same error after some time, then check out the below point.

2. An issue with the database services

Reason:

There may be some issues with the database services. Either database services are stopped or getting issues while starting. Many users have observed that they faced an issue while starting the database service due to updated security settings. Due to security settings, users may face port or access-related issues.

Solution:

Restart the database services. Check if database services are up and running. There is a possibility of the database service got hung and in that case, restarting the Oracle services will solve the issue. Here are the steps to do so.

  • Got to search bar, type Services and select Services app.
  • Restart Oracle Service and then Oracle Listener Service as shown below.

Oracle Service and Oracle Listener Service

3. Forced shutdown or incomplete shutdown of database

Reason:

When you execute a command to shut down the database, database software internally executes some stepwise procedures to shut down the database. And it may take a few minutes. If you forcefully close the database service or shut down the system due to a power cut issue in between the database shutdown process then it may result in a complete shutdown of the database. Which can cause the above error message while login into the database again.

Solution:

Shut down and start the database. If there is any issue during the shutdown and startup process then try shutting down the database forcefully and start again using the below steps.

  • Open command prompt and log in as sysdba using the following command
    sqlplus / as sysdba
  • Enter the following command to forcefully shutdown database
    shutdown abort;
  • Execute the below command to startup the database again
    startup;

Force shut down Oracle database and restart

Now try to login into the database and you should be able to log in without any error message. If you are still getting the error then try the next step.

4. The database is not mounted or opened

Reason:

If the database is not mounted properly, while starting the database then it can result in the error message “ora-01033 oracle initialization or shutdown in progress“. If the database is mounted then it’s available for the database administrators only. Normal users can’t access a database that is mounted but not opened.

Solution:

Try to mount and open the database using the following steps and it should fix the error.

If the database is mounted but not open then you may end up getting the error as well. To check whether the database is MOUNTED or OPEN or neither of those, you can execute points #4 and #6 to understand the current status.

Check Database Status

Note: If STATUS is MOUNTED then it means the database is mounted but not opened.

  1. Open command prompt and log in to database as sysdba.
    sqlplus / as sysdba
  2. Forcefully shutdown database.
    shutdown abort;
  3. Mount the database.
    startup mount;
  4. Check whether the database is mounted or not.
    select status, database_status from v$instance;
  5. Open the database.
    alter database open;
  6. Check whether the database is open or not.
    select status, database_status from v$instance;

how to fix ora-01033 oracle initialization or shutdown in progress error

5. Corrupted database files

Some intentional or unintentional invalid activity may damage some database files. If DBF, CTL, or ORA files are corrupted then it can cause the error “ora-01033 oracle initialization or shutdown in progress”.

If all the above steps do not work and you are still getting the same error message, then uninstall the database software and install it again. Before uninstalling the DB, make sure you take a backup of the data.

Create a new database instance and try to import the previous database files if you have taken the backup of the running instance.

Note: It’s highly recommended to take a backup of the database from time to time. If you come across such issues where it cannot be resolved, then restoring the DB to a previous stage is easy or else you will end up losing all the data.

Final thoughts:

We hope you are able to get rid of the “ora-01033 oracle initialization or shutdown in progress” error using the above steps. Let us know in the comments which steps helped you fix the error. If you are still having challenges, do mention them in the comment section and we would be happy to help you.

Read also:

How to use Column Mode Editing in Notepad++

Introduction

Before starting the topic, first I want to explain why this started up or shutdown error occurs. Sometimes while making the clone of production database into a test server this type of error may be encountered.So there are the following major reasons why ORA-01033 error occurs:

  1. The ORA-01033 error also happens when you have leftover RAM regions held by the OS that makes Oracle think that an instance is already running.
  2. The ORA-01033 error also happens when the database is not open.
  3. The ORA-01033: ORACLE initialization or shutdown in progress error can also happen when Oracle is attempting startup or shutdown and is «hanging» on a resource such as a failed disk, writing to redo, etc.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

To fix this error follow the bellow steps,

Step 1

Open command prompt and give the command,

  1. sqlplus / as sysdba   

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

When you hit the ENTER key, it shows it’s connected to Oracle 12c.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Step 2

To check the connection name, use the following command,

  1. show con_name;   

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

When you hit the ENTER key, It shows connection CDB$ROOT (container Database Selected from root).

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Step 3

Check the schema name and connection id using the below command–

  1. select name,con_id from v$pdbs;  

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

When you hit the ENTER key, it shows the name of schema object with respect to their id’s.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Note that, in PDB$SEED the ‘SEED’ is template, used to create a new pluggable database within the container database (CDB).

Step 4

Now, select name of pluggable database from active services whose connection id=3, by using the following command –

  1. select name from v$active_services where con_id=3;  

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

When you hit the ENTER key, It shows the name ‘pdborcl’.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error? 

Step 5

Now, close the command prompt and follow the below procedure.

  • Open the ‘app’ folder which is created, while installing the oracle 12c.
  • After opening the ‘app’ folder open the ‘DB user folder’. The ‘DB user folder’ is that folder, whose name you assigned by your own, while installing oracle 12c. In my case it is ‘sanghdeep’.
  • After this, you see the same folder. From those folders, open the ‘product’ folder.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

  • After opening the ‘product’ folder, open the ‘12.1.0’ folder. It varies from your Oracle DB version.
  • After opening the ‘12.1.0’ folder, open the ‘dbhome_1’ folder.
  • The ‘dbhome_1’ folder contains many different types of folders, from those folders you should open the ‘ NETWORK ‘ folder.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

  • After opening the ‘NETWORK’ folder, open the ‘ADMIN’ folder.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

  • After opening the ‘ADMIN’ folder, open the ‘ tnsnames.ora’ file in any text editor. 

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

After opening the ‘ tnsnames.ora’ file in text editor, you see the following code. 

  1. # tnsnames.ora Network Configuration File: E:\app\sanghdeep\product\12.1.0\dbhome_1\network\admin\tnsnames.ora    
  2. # Generated by Oracle configuration tools.    
  3. LISTENER_ORCL = (  
  4.   ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)  
  5. ) ORACLR_CONNECTION_DATA = (  
  6.   DESCRIPTION = (  
  7.     ADDRESS_LIST = (  
  8.       ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)  
  9.     )  
  10.   ) (  
  11.     CONNECT_DATA = (SID = CLRExtProc) (PRESENTATION = RO)  
  12.   )  
  13. ) ORCL = (  
  14.   DESCRIPTION = (  
  15.     ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)  
  16.   ) (  
  17.     CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)  
  18.   )  
  19. )  

From the above code copy the last portion of the code i.e.:

  1. ORCL = (  
  2.   DESCRIPTION = (  
  3.     ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)  
  4.   ) (  
  5.     CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)  
  6.   )  
  7. )  

And paste it at the end of the whole code. Then, make the change into it as follows. After making the following changes save it. 

  1. PDBORCL = (  
  2.   DESCRIPTION = (  
  3.     ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)  
  4.   ) (  
  5.     CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = pdborcl)  
  6.   )  
  7. )  

Finally ensure that your entire code will looks as follows. And close the ‘tnsnames.ora’ file and also close the ‘app’ folder. 

  1. # tnsnames.ora Network Configuration File: E:\app\sanghdeep\product\12.1.0\dbhome_1\network\admin\tnsnames.ora    
  2. # Generated by Oracle configuration tools.    
  3. LISTENER_ORCL = (  
  4.   ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)  
  5. ) ORACLR_CONNECTION_DATA = (  
  6.   DESCRIPTION = (  
  7.     ADDRESS_LIST = (  
  8.       ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)  
  9.     )  
  10.   ) (  
  11.     CONNECT_DATA = (SID = CLRExtProc) (PRESENTATION = RO)  
  12.   )  
  13. ) ORCL = (  
  14.   DESCRIPTION = (  
  15.     ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)  
  16.   ) (  
  17.     CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)  
  18.   )  
  19. ) PDBORCL = (  
  20.   DESCRIPTION = (  
  21.     ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)  
  22.   ) (  
  23.     CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = pdborcl)  
  24.   )  
  25. )  

Step 6

Open the command prompt as ‘administrator’ and give the following command.

  1. lsnrctl reload  

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

When you hit the ENTER key, it shows a description about connection.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error? 

Step 7

Now, give the command,

  1. sqlplus / as sysdba  

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

When you hit the ENTER key, it shows a description about connection.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error? 

Step 8

To alter the session from container database to pluggable database give the command-

  1. alter session set container=pdborcl;  

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

When you hit the ENTER key, it shows session altered.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Step 9

To check if the session is altered from CDB$ROOT to PDBORCL use the following command-

  1. show con_name;  

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

When you hit the ENTER key, It shows connection name as ‘PDBORCL’.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Step 10

Now check the connection mode, give the following command-

  1. select name,open_mode from v$pdbs;  

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

When you hit the ENTER key, It shows connection mode is ‘OPEN_MODE’ but pluggable database is ‘MOUNTED’

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Step 11

Now, alter the pluggable database to change the open mode from ‘MOUNTED’ to ‘READ WRITE’, by using the command-

  1. alter pluggable database open;  

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Step 12

To ensure the ‘OPEN_MODE’ of pluggable database is changed from ‘MOUNTED’ to ‘READ WRITE’, once again use the command-

  1. select name,open_mode from v$pdbs;  

When you hit the Enter key, ‘OPEN_MODE’ is ‘READ WRITE’.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error? 

Step 13

Now the pluggable database is altered and the open mode is also changed as ‘READ WRITE’. So we can unlock the HR Schema. To unlock the HR schema use the following command,

  1. alter user HR identified by HR account unlock;  

When you hit the Enter key, then HR schema will unlock and it shows user altered.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Step 14

To connect with the pluggable database using HR schema use the following command-

  1. conn HR/HR @pdborcl;  

When you hit the Enter key, it shows as connected.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Step 15

  1. show user;  

When you hit the Enter key, it shows USER is “HR”.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error? 

In this way, we successfully fix the ORA-01033 error, to unlock th HR schema object. Now we can connect with pluggable database using HR user. Open the SQL developer tool and enter username as ‘HR’ and password is also ‘HR’ and click on ‘OK’ button.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Now you see that, the ORA-01033 error is successfully fixed and we successfully connected with pluggable database using HR schema object/HR user.

How To Unlock HR Schema In Oracle-12C Or How To Fix The ORA - 01033 Error?

Summary

In this article we learned about how to fix the start up or shutdown error (ORA — 01033 error).

You will see this error very often during data guard setup, the main reason for this error is the password files are not copied to from primary to standby.

ORA-01033: ORACLE initialization or shutdown in progress.
Cause: An attempt was made to log on while Oracle is being started up or shutdown.
Action: Wait a few minutes. Then retry the operation 


If you don’t have any password file then create one using below command on primary and copy to standby node.

$orapwd file=orapwDG password=xxxxxx

In case of RAC, the password file might be on Primary cluster DB which was stored in ASM, but on standby you have copied the password file to $ORACLE_HOME/dbs

Run below commands to on both primary and standby

For ex:- On Primary

$ srvctl config database -d DG 

Database unique name: DG
Database name: DG
Oracle home: /home/oracle/product/12.2.0.1/dbhome_1
Oracle user: oracle
Spfile: +DISK1/DG/ parameterfile/spfileDG.ora
Password file: +DISK1/DG/ parameterfile/pwdDG

For ex:- On standby
$ srvctl config database -d DG_std
Database unique name: DG_std
Database name: DG
Oracle home: /home/oracle/product/12.2.0.1/dbhome_1
Oracle user: oracle
Spfile: +DISK1/DG/ parameterfile/spfileDG.ora
Password file: /home/oracle/product/12.2.0.1/dbhome_1/dbs/orapwDG

Also users see this error on normal database. There are many possible reasons for this error.
1. You may get this error if Database might not opened
2. Startup/shutdown is in the middle and hung up.
3. If you are trying to connect to wrong database
4. Database might be in down for recovery

Please make sure you check below

1. If the database is not opened then use command “alter database open” .
2. Check target DB is in the middle of startup or shutdown as system is very busy or has some issues. You need to verity alert.log to find out the real issue.
3. Verify all environment variable are set correct and In case if DB is down startup the database
4. In case if user doing recovery and not successful and below steps will help to recover the DB
SQL> startup mount
ORACLE Instance started
SQL> recover database
Media recovery complete
SQL> alter database open;
Database altered

Regards

Satishbabu Gunukula, Oracle ACE

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