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Marc Wagner

RMAN debugging during catalog import

In this post I would like to share how I have been able to troubleshoot and solve a catalog import issue using RMAN debug function.

As we can see, the error message provided by RMAN is not very helpful.

oracle@vmtestoradg1:/home/oracle/ [RCAT12C] rman catalog rcat/manager
Recovery Manager: Release 12.2.0.1.0

connected to recovery catalog database

RMAN> import catalog rcat/manager@RCAT11G;

Starting import catalog at 05-JAN-2018 14:11:45
connected to source recovery catalog database
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of import catalog command at 01/05/2018 14:11:46
RMAN-06004: ORACLE error from recovery catalog database: ORA-00933: SQL command not properly ended

RMAN>

 

Instead of looking for possible more information in appropriate logs, we can easily use the RMAN debug function.

RMAN> debug on;

 

By running the import command again we will be able to extract below useful information on the command RMAN is complaining about.

DBGSQL:           CREATE DATABASE LINK
DBGSQL:            RCAT11G.IT.DBI-SERVICES.COM
DBGSQL:            CONNECT
DBGSQL:              TO
DBGSQL:            "RCAT"
DBGSQL:            IDENTIFIED BY
DBGSQL:            "manager"
DBGSQL:            USING
DBGSQL:            'RCAT11G'
DBGSQL:
DBGSQL:              sqlcode = 933
DBGSQL:           error: ORA-00933: SQL command not properly ended (krmkosqlerr)

 

Let’s run the command into a sqlplus session to understand the failure.

SQL> conn rcat/manager
Connected.
SQL> CREATE DATABASE LINK RCAT11G.IT.DBI-SERVICES.COM
CONNECT TO "RCAT" IDENTIFIED BY "manager"
USING 'RCAT11G';  2    3
CREATE DATABASE LINK RCAT11G.IT.DBI-SERVICES.COM
                                   *
ERROR at line 1:
ORA-00933: SQL command not properly ended

 

We can quickly understand that the ‘-‘ character is not appropriately used for domain name.

Let’s temporarily update needed parameters. An instance restart will be needed.

SQL> alter system set db_domain='dbiservices' scope=spfile;

System altered.

SQL> alter system set service_names='dbiservices' scope=both;

System altered.

SQL> alter database rename GLOBAL_NAME to "RCAT11G.dbiservices";

Database altered.

 

And our next import will be successful.

RMAN> import catalog rcat/manager@RCAT11G;

Starting import catalog at 05-JAN-2018 15:21:48
connected to source recovery catalog database
import validation complete
database unregistered from the source recovery catalog
Finished import catalog at 05-JAN-2018 15:21:52

RMAN>

 

We will be able to restore DB_DOMAIN, SERVICE_NAMES and GLOBAL_NAME to previous values, followed by a catalog instance restart.

 

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Marc Wagner
Marc Wagner