Simplified Downgrade Procedure
- Yeok Hong Ng
- Jenni Wallin
A system downgrade is a user controlled downgrade to an older version of MediationZone. Â Â Â Â Â Â Â Â
This procedure can be used after a simplified upgrade.Â
To revert to a previously installed version, execute the following procedure:
Ensure that the environment variables are set correctly:
Variable | Description |
|---|---|
MZ_HOME | This environment variable specifies where the software is installed. |
JAVA_HOME | This environment variable specifies where the JDK is installed. |
PATH | This environment variable specifies where the search path must contain the following directories:
|
Example - Extracting the Upgrade Software
$ export MZ_HOME=/opt/mzÂ
$ export JAVA_HOME=/opt/jdk/jdk-17.0.2
$ export PATH=$JAVA_HOME/bin:$MZ_HOME/bin:$PATHDisable all workflow groups, either from the Execution Manager in Desktop, or by entering the following command:
$ mzsh mzadmin/<password> wfgroupdisable \*
Note!
If you use the wfgroupdisable command, make sure that you enable all system tasks again when you are done.
Stop all workflows.Â
Shut down all connected Desktops.
If you want to see which Desktops that are connected, you can use the following command:
$ mzsh mzadmin/<password> pico -view
Note!
This command will also display other pico instances, such as ECs..
Shut down the Platform and all ECs.
Remove MZ_HOME.
Restore the backup of MZ_HOME.
If you are downgrading a system not using Derby, restore the database backup.
Resume Workflow Execution
Set the environment variables JAVA_HOME and PATH according to the system requirements of the restored version.
Start the Platform and all ECs.
Import the configurations that were exported in the old version prior to the upgrade. Â Â Â Â
Start the real-time workflows.
Enable the Workflow Groups.