# KOTS: Error launching Kubernetes App

**URL:** <https://community.replicated.com/t/kots-error-launching-kubernetes-app/385>\
**Category:** Supporting your customers\
**Created:** [January 20, 2020, 8:38pm UTC](https://community.replicated.com/t/kots-error-launching-kubernetes-app/385 "2020-01-20T20:38:51Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![dex](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.replicated.com/dex/32/26_2.png) [@dex](https://community.replicated.com/u/dex)\
**Post date:** [January 20, 2020, 8:38pm UTC](https://community.replicated.com/t/kots-error-launching-kubernetes-app/385/1 "2020-01-20T20:38:51Z")

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I have received the following error when trying to install my application via Replicated KOTS (embedded cluster via kURL)

`failed to attach volume replicapool/pvc-13505369-13ad-47da-9032-e2aad08d9405: failed to map image replicapool/pvc-13505369-13ad-47da-9032-e2aad08d9405 cluster rook-ceph. failed to map image replicapool/pvc-13505369-13ad-47da-9032-e2aad08d9405: Failed to complete 'rbd': signal: interrupt. . output:`

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**Author:** ![dex](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.replicated.com/dex/32/26_2.png) [@dex](https://community.replicated.com/u/dex)\
**Post date:** [January 20, 2020, 8:40pm UTC](https://community.replicated.com/t/kots-error-launching-kubernetes-app/385/2 "2020-01-20T20:40:37Z")

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This can happen with KOTS apps on some versions of Ubuntu 16.04 – the recommended fix is to start from a clean Ubuntu 18.04 base image. (See [supported versions for kURL](https://kurl.sh/docs/install-with-kurl/system-requirements) for more)

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**Author:** ![Austin\_Chambers](https://avatars.discourse-cdn.com/v4/letter/a/dec6dc/32.png) [@Austin\_Chambers](https://community.replicated.com/u/Austin_Chambers)\
**Post date:** [January 20, 2020, 9:27pm UTC](https://community.replicated.com/t/kots-error-launching-kubernetes-app/385/3 "2020-01-20T21:27:43Z")

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Alternatively, you can upgrade the kernel to a later version to fix this problem. It has been verified in versions 4.15 and later. After a reboot, it should work.

> sudo apt-get update  
> sudo apt-get install ukuu  
> sudo ukuu --install v4.15

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**Author:** ![AJ-Jester](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.replicated.com/aj-jester/32/94_2.png) [@AJ-Jester](https://community.replicated.com/u/AJ-Jester)\
**Post date:** [July 22, 2021, 6:20pm UTC](https://community.replicated.com/t/kots-error-launching-kubernetes-app/385/4 "2021-07-22T18:20:34Z")

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It looks like this can happen with any Linux OS with Kernel \< 4.15, not just Ubuntu.

This happened recently with Amazon Linux 2 `4.14.232-177.418.amzn2.x86_64` as well.