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8/26/2013 – Get to Know the Concept of cPanel Upgrade and Downgrade Blockers

Posted by Jamison on 26 08 2013.

Updates are necessary for any software platform that you use. Critical updates are crucial for your computer’s operating system due to security enhancements and other features. Upgrades on programs also enable users to enjoy new features that promote their advantages. This is also the same with cPanel & WHM. You receive upgraded cPanel & WHM versions while updates extend added functionality on your system.


Meet the ‘blockers’


Blockers were introduced at the time when version 11.30 was released online. Upgrading cPanel version from one major build to other choices is considered as a major change in your system. Therefore, your cPanel system and plugins must be completely prepared to integrate these changes. Without these blockers, there’s a great chance that updating can cause instability in your cPanel system and affect its overall function.


What blockers check in your cPanel?


Many users are curious as to how cPanel works together with other plugins for the entire updating process. Hearing the concept of blockers would immediately stir their minds as to what these components check in preparation for the upgrade. Here are some details that blockers check in your cPanel system:


  • Licenses. Remember that cPanel as well as its plugins run with the help of licenses. Therefore, blockers need to check first if cPanel & WHM licenses can be detected or valid in the system. Your server’s license should also be eligible for updates before carrying on with the upgrading procedure. In case you know that your cPanel and server licenses are valid but still present these problems, you can contact cPanel’s support to help you fix the issue.


  • Read-only file systems. Important files should be placed or saved in critical directories. Hence, directories should be writable or not full to complete this procedure. Blockers will scan critical directories’ status to guarantee you can continue with the upgrade.


  • RPM database integrity. RPM databases are also crucial components in your cPanel system. To check its integrity, blockers will install a test RPM then uninstall it afterwards. It will attempt to fix any problems found in you cPanel system. Failing to repair these problems will keep you from updating your cPanel & WHM system.


Why do you need to know these blockers?


Blockers are important since they take part in assessing your system prior to upgrading or downgrading cPanel versions. However, you might be surprised in case you upgrade and notice that blockers will continue to check the system. cPanel requires you to upgrade to major versions first before installing the version that you want. For instance, you’re currently using version 11.30 and plan to install 11.36. Hence, you need to upgrade first to version 11.32 then 11.34 and lastly, 11.36. Don’t be surprised if you’ll encounter blockers along the way.


As for downgrading, blockers will also verify if your system is ready for downgrade. cPanel released a note that downgrading to older versions than 11.30 is impossible. Just like in upgrading, blockers will check specific requirements before you can downgrade.


These details emphasizes the importance of understanding how blockers work during upgrade and downgrade process.


Upgrading cPanel versions is essential but you need to stop and learn first about these blockers before you do these procedures. This prepares your system and ensures stability at all times after using the new system.