Issue

• Data migration failed during upgrade process

# ./install.pl --upgrade

* Starting the Spacewalk installer.
* Performing pre-install checks.
* Pre-install checks complete.  Beginning installation.
* RHN Registration.
** Registration: System is already registered with RHN.  Not re-registering.
* Upgrade flag passed.  Stopping necessary services.
* Purging conflicting packages.
* Checking for uninstalled prerequisites.
** Checking if yum is available ...

There are some packages from Red Hat Enterprise Linux that are not part
of the @base group that Satellite will require to be installed on this
system. The installer will try resolve the dependencies automatically.
However, you may want to install these prerequisites manually.
Do you want the installer to resolve dependencies [y/N]? y

* Installing RHN packages.
* Now running spacewalk-setup.
* Setting up Selinux..
** Database: Setting up database connection for PostgreSQL backend.
** Database: Installing the database:
** Database: This is a long process that is logged in:
** Database:   /var/log/rhn/install_db.log
*** Progress: #
** Database: Installation complete.
** Database: Populating database.
*** Progress: ###################################
* Database: Starting Oracle to PostgreSQL database migration.
** Database: Starting embedded Oracle database.
** Database: Trying to connect to Oracle database: succeded.
** Database: Migrating data.
*** Database: Migration process logged at: /var/log/rhn/rhn_db_migration.log
*** Data migration failed.  Exit value: 3.

Please examine /var/log/rhn/rhn_installation.log for more information.
You have mail in /var/spool/mail/root