Information
Periodically, newer versions are released for Java software either due to security flaws or to include additional functionality. Using the latest Java version for web apps is recommended in order to take advantage of security fixes, if any, and/or new functionalities of the newer version.
Rationale:
Newer versions may contain security enhancements and additional functionality. Using the latest software version is recommended in order to take advantage of enhancements and new capabilities. With each software installation, organizations need to determine if a given update meets their requirements and also verify the compatibility and support provided for any additional software against the update revision that is selected.
Solution
From Azure Console
Login to Azure Portal using https://portal.azure.com
Go to App Services
Click on each App
Under Setting section, Click on Application settings
Under General settings, Set Java version to latest version available
Set Java minor version to latest version available
Set Java web container to the latest version of web container available
NOTE: No action is required If Java version is set to Off as Java is not used by your web app.
Using Azure Command Line Interface
To see the list of supported runtimes:
az webapp list-runtimes | grep java
To set latest Java version for an existing app, run the following command:
az webapp config set --resource-group <RESOURCE_GROUP_NAME> --name <APP_NAME> --java-version '1.8' --java-container 'Tomcat' --java-container-version '<VERSION>'