Installing an Update or Hotfix Graphically¶

Follow these steps to install an update or a hotfix from the Control Center:

1. Go to the Support Site, to the page of the update, to read the RELEASE NOTES of the update; pay special attention to the Post-installation actions section (it is in the Support Site, in the Details page of the update).

2. Decompress the zip file of the update/hotfix.

3. Stop all the Denodo servers and tools, in the host where you are going to install the update or hotfix.

4. Optionally, make a copy of the entire folder of the Denodo Platform. It is not possible to rollback a Denodo update, so this copy will allow you to restore quickly the Platform to its previous state, if necessary.

   Before copying the folder, delete the content of these folders to save space:

   • <DENODO_HOME>/work/vdp/swap

   • <DENODO_HOME>/work/vdp/pipe

   These folders contain information that is not necessary once the Denodo server is stopped.

5. On production servers, if any of the components is configured to store its metadata and settings on an external database, we recommend making a backup of the catalog of the database where the metadata is stored.

   The components that can be configured to store its metadata and settings on an external database are the Solution Manager, Virtual DataPort, Data Catalog and Scheduler.

   This recommendation is not about the cache database of Virtual DataPort.

6. Run <DENODO_HOME>/bin/denodo_platform to open the Denodo Control Center.

7. Click Update (on the right wide of the window). This dialog lists the updates that have been installed (the last update of the list is the current one).

8. Click Install update and select the jar file (not the zip file) of the update. The Control Center will display a dialog with a progress bar.

Installing an Update or Hotfix from the Command Line¶

You can install an update or a hotfix from the command line, without displaying a GUI. This is useful if you want to install an update or a hotfix using a script or in a host without graphical support.

To do this, follow these steps:

1. Go to the Support Site, to the page of the update, to read the RELEASE NOTES of the update; pay special attention to the Post-installation actions section (it is in the Support Site, in the Details page of the update).

2. Decompress the zip file of the update or hotfix.

3. Stop all the Denodo servers and tools, in the host where you are going to install the update or hotfix.

4. Optionally, make a copy of the entire folder of the Denodo Platform. It is not possible to rollback a Denodo update, so this copy will allow you to restore quickly the Platform to its previous state, if necessary.

   Before copying the folder, delete the content of these folders to save space:

   • <DENODO_HOME>/work/vdp/swap

   • <DENODO_HOME>/work/vdp/pipe

   These folders contain information that is not necessary once the Denodo server is stopped.

5. On production servers, if any of the components is configured to store its metadata and settings on an external database, we recommend making a backup of the catalog of the database where the metadata is stored.

   The components that can be configured to store its metadata and settings on an external database are the Solution Manager, Data Catalog and Scheduler.

   This recommendation is not about the cache database of Virtual DataPort.

6. Open a command line. On Windows, launch the command line with the option “Run as administrator” even if you are logged in as an administrator.

7. Execute the following command:

   For Linux:

   cd <DENODO_HOME>
   ./jre/bin/java -jar <path to the JAR file of the update> <DENODO_HOME> -c
   

   For example (Linux):

   cd <DENODO_HOME>
   ./jre/bin/java -jar denodo-v80-update-202102092200.jar "$PWD" -c
   

   For Windows:

   cd <DENODO_HOME>
   .\jre\bin\java.exe -jar <path to the JAR file of the update> <DENODO_HOME> -c
   

   For example (Windows):

   cd <DENODO_HOME>
   .\jre\bin\java.exe -jar denodo-v80-update-202102092200.jar "%CD%" -c
   

In the commands above, replace <DENODO_HOME> with the path to the installation of Denodo.

This installs the update in the installation of <DENODO_HOME>.

If the installer detects that any Denodo server or tool is running, it will ask for configuration to continue. The installer does this to make sure that the update or the hotfix can be installed correctly. Take this into account if you are using a script to install the same update or hotfix on several hosts.

This command returns one of these exit codes:

• 0: the update/hotfix is installed successfully.

• 1: one or more commands executed during the installation of the update/hotfix fails.

• -1: when any other kind of error occurs.

Troubleshooting the Updates Installer¶

During the installation of an update or a hotfix, there may be unexpected errors that prevent the installation from completing correctly. For example, the user that starts the update does not have enough privileges to modify the installation or, if you are on Windows, another application is blocking a file of the Denodo Platform.

To troubleshoot these problems, install the update or the hotfix from the command line and add the parameter --log-level=DEBUG. For example:

cd <DENODO_HOME>
./jre/bin/java -jar denodo-v80-update-202102092200.jar <DENODO_HOME> -c --log-level=DEBUG

Once the installation process finishes, open the most recent file of the folder <DENODO_HOME>/logs/update. This file will contain logging information about the installation process that may help you find the cause of the problem.

The allowed values for the parameter --log-level are (from more informational to less informational): TRACE, DEBUG, INFO, WARN and ERROR.