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Your older kernel might cause issues during CloudLinux OS update. Here is how to fix it.

Your older kernel might cause issues during CloudLinux OS update. Here is how to fix it.

During the recent update to CloudLinux OS version 7.3, some servers have crashed due to a race condition between kmem uncharge and charge reparenting. The issue is not present on last production kernel and only older kernels are affected.

If you are still running kernel-3.10.0-427.10.1.lve1.4.22 or older, you could be affected.

The safe upgrade to 7.3 roadmap is:

- update kernel to the latest one and reboot:

$ yum install kernel-3.10.0-427.18.2.lve1.4.24.el7 kmod-lve-1.4-24.el7

$ reboot

- update the rest of the system packages:

$ yum update

If you have any questions, please contact our support team at helpdesk.cloudlinux.com.

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Comments 9

Guest - Ryan Smith on Saturday, 19 November 2016 01:45

If servers upgraded to 7.3 without crashing do we still need to reboot?

If servers upgraded to 7.3 without crashing do we still need to reboot?
usuxesuserum usuxesuserumPP on Monday, 21 November 2016 13:14

If you was using older kernel and it was updated - yes you need to reboot.

If you was using older kernel and it was updated - yes you need to reboot.
Guest - Ryan Smith on Monday, 21 November 2016 13:51

Will the issue manifest after the initial upgrade? My servers have been fine for days now after.

Will the issue manifest after the initial upgrade? My servers have been fine for days now after.
usuxesuserum usuxesuserumPP on Monday, 21 November 2016 13:59

The issue could happens only during initial upgrade. You are fine if passed it already.

The issue could happens only during initial upgrade. You are fine if passed it already.
Guest - charlie on Monday, 21 November 2016 10:10

Hi,

Kernelcare is not fixing this?

Hi, Kernelcare is not fixing this?
usuxesuserum usuxesuserumPP on Monday, 21 November 2016 13:13

Not yet, work in progress.

Not yet, work in progress.
Guest - Howard on Monday, 21 November 2016 15:06

I am surprised that kernelcare is not on top of this yet, please do make kernelcare plays its role asap!

I am surprised that kernelcare is not on top of this yet, please do make kernelcare plays its role asap!
Guest - Inna on Monday, 21 November 2016 21:54

KernelCare mostly focuses on security issues, and this is the reason the fix was not available right away. Yet, we are planning to re-orient KernelCare to take care of such bugfixes for CloudLinux 7 kernels as well. We are working on making KernelCare fix this issue as well...

KernelCare mostly focuses on security issues, and this is the reason the fix was not available right away. Yet, we are planning to re-orient KernelCare to take care of such bugfixes for CloudLinux 7 kernels as well. We are working on making KernelCare fix this issue as well...
Guest - Guest on Monday, 21 November 2016 15:43

Who has any server Crash on recent CloudLinux Update to 7.3?

None of our servers crached also, and we also use the kernel-3.10.0-427.10.1.lve1.4.22 and updated ok to 7.3

Stange.... I dont find anyone complaining in CloudLinux Foruns, or cPanel Foruns or WHT or any outher media.

Anouther Kernel update and anouther Reboot (witout KernelCare)?

Whe the "lucky" ones that dont have any issues need to update the Kernel even if everithing is "working fine" on 7.3 ?

Who has any server Crash on recent CloudLinux Update to 7.3? None of our servers crached also, and we also use the kernel-3.10.0-427.10.1.lve1.4.22 and updated ok to 7.3 Stange.... I dont find anyone complaining in CloudLinux Foruns, or cPanel Foruns or WHT or any outher media. Anouther Kernel update and anouther Reboot (witout KernelCare)? Whe the "lucky" ones that dont have any issues need to update the Kernel even if everithing is "working fine" on 7.3 ?
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