# Job rejected due to not a valid resource class with machine image ubuntu-2404:2026.02.2 **URL:** \ **Category:** Bug Reports\ **Tags:** circle-yml\ **Created:** [March 9, 2026, 3:23pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445 "2026-03-09T15:23:05Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![shakuzen](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/shakuzen/32/36941_2.png) [@shakuzen](https://discuss.circleci.com/u/shakuzen)\ **Post date:** [March 9, 2026, 3:23pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/1 "2026-03-09T15:23:05Z")
We are [trying to upgrade](https://github.com/micrometer-metrics/micrometer/pull/7262) the machine image we use for the Micrometer build from `ubuntu-2404:2025.09.1` to `ubuntu-2404:2026.02.2`. However, the job fails to run with an error message like the following: > Job was rejected because resource class medium, image ubuntu-2404:2026.02.2 is not a valid resource class We didn’t explicitly specify a resource class, but we have since tried specifying a variety of resource classes. All fail with a similar message. Is there some issue on the CircleCI side or with our configuration? ---
**Author:** ![MikeMcC399](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/mikemcc399/32/35377_2.png) [@MikeMcC399](https://discuss.circleci.com/u/MikeMcC399)\ **Post date:** [March 11, 2026, 4:24pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/2 "2026-03-11T16:24:25Z")
Hi @shakuzen I just had the same experience. It appears that the image was renamed. Check the current list of available images on [CircleCI Developer - Machine Imagesubuntu-2404 - CircleCI](https://circleci.com/developer/machine/image/ubuntu-2404). I had success with `ubuntu-2404:2026.02.20` > machine-agent version 1.0.121027-1c678a53 (image: “ubuntu-2404:2026.02.20”, public ip: “3.84.54.181”, provider: “EC2”) > task-agent version 1.0.315880-984b2a35 > Downloading task-agent: success after 324.963071ms. ---
**Author:** ![ahmedwab](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/ahmedwab/32/35746_2.png) [@ahmedwab](https://discuss.circleci.com/u/ahmedwab)\ **Post date:** [March 11, 2026, 8:16pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/3 "2026-03-11T20:16:08Z")
Hi, these image names were meant to be internal and weren’t intended to be used directly, they got picked up by our indexer when they shouldn’t have. They’re designed to be called via the `docker-docker29` alias rather than by name. The image will still be able to be used directly using `ubuntu-2404:2026.02.20` in the meantime. We’ve added a flag to prevent images like these from being indexed going forward unless they’re explicitly intended for direct use. ---
**Author:** ![MikeMcC399](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/mikemcc399/32/35377_2.png) [@MikeMcC399](https://discuss.circleci.com/u/MikeMcC399)\ **Post date:** [March 12, 2026, 5:54am UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/4 "2026-03-12T05:54:54Z")
@ahmedwab Thank you for clarifying about the new images! `ubuntu-2404:2026.02.20` is actually a very useful update, since it bumps Docker from 28.x to 29.x and it updates Ubuntu from 24.04.3 to 24.04.4 LTS. Would it be possible to officially release this image, or perhaps an image with a `2026.03.1` (March) tag? According to the [CircleCI Linux VM images support policy - CircleCI Docs](https://circleci.com/docs/guides/execution-managed/linux-vm-support-policy/) it says: > We always aim to release a version of this image every three months. Tags will be supported on all versions we support. and the last image on the updated list [CircleCI Developer - Machine Imagesubuntu-2404 - CircleCI](https://circleci.com/developer/machine/image/ubuntu-2404) is showing `2025.09.1` which is by now approximately 6 months old. ---
**Author:** ![Milezdeep9](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/milezdeep9/32/36861_2.png) [@Milezdeep9](https://discuss.circleci.com/u/Milezdeep9)\ **Post date:** [March 12, 2026, 1:06pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/5 "2026-03-12T13:06:19Z")
workflows: version: 2 build\_test\_and\_deploy: jobs: - build: context: org-global ---
**Author:** ![ahmedwab](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/ahmedwab/32/35746_2.png) [@ahmedwab](https://discuss.circleci.com/u/ahmedwab)\ **Post date:** [March 23, 2026, 3:04pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/6 "2026-03-23T15:04:56Z")
Hi @MikeMcC399, The intention is to wait for the new 26.04 machine before making an official release. In the meantime, you can continue using `ubuntu-2404:2026.02.20` directly as it’s still available. To clarify my earlier comment: when I said “internal,” I meant the image was designed to be accessed via a different alias (docker-docker29) rather than by name directly, not that it was unavailable for use. Appreciate your patience! ---
**Author:** ![MikeMcC399](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/mikemcc399/32/35377_2.png) [@MikeMcC399](https://discuss.circleci.com/u/MikeMcC399)\ **Post date:** [March 23, 2026, 3:22pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/7 "2026-03-23T15:22:43Z")
Hi @ahmedwab Did I understand you correctly that there will be a new `ubuntu-2404` release when Ubuntu 26.04 is available? Does that mean you are also planning to release an `ubuntu-26.04` image? I’m seeing Ubuntu 26.04 LTS (Resolute Raccoon) planned for [release](https://discourse.ubuntu.com/t/resolute-raccoon-release-schedule/47198) on April 23, 2026 with a beta release on March 26, 2026. ---
**Author:** ![ahmedwab](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/ahmedwab/32/35746_2.png) [@ahmedwab](https://discuss.circleci.com/u/ahmedwab)\ **Post date:** [March 25, 2026, 1:13pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/8 "2026-03-25T13:13:56Z")
Yes, that’s the plan! The intention is to release both a new `ubuntu-2404` image and a new `ubuntu-2604` image once Ubuntu 26.04 is available. ---
**Author:** ![MikeMcC399](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/mikemcc399/32/35377_2.png) [@MikeMcC399](https://discuss.circleci.com/u/MikeMcC399)\ **Post date:** [April 28, 2026, 4:24pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/9 "2026-04-28T16:24:13Z")
Ubuntu 26.04 was released on April 23, 2026 and is now [available](https://canonical.com/blog/canonical-releases-ubuntu-26-04-lts-resolute-raccoon). Do you have any planning dates for CircleCI now? ---
**Author:** ![ahmedwab](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/ahmedwab/32/35746_2.png) [@ahmedwab](https://discuss.circleci.com/u/ahmedwab)\ **Post date:** [May 5, 2026, 7:19pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/10 "2026-05-05T19:19:20Z")
Hey, Yes, we are currently working on it. I will update this thread as soon as I am done. ---
**Author:** ![ahmedwab](https://sea2.discourse-cdn.com/circleci/user_avatar/discuss.circleci.com/ahmedwab/32/35746_2.png) [@ahmedwab](https://discuss.circleci.com/u/ahmedwab)\ **Post date:** [May 13, 2026, 2:20pm UTC](https://discuss.circleci.com/t/job-rejected-due-to-not-a-valid-resource-class-with-machine-image-ubuntu-2404-2026-02-2/54445/11 "2026-05-13T14:20:48Z")
Hey Mike, New images are now available. You can take a look at this post [Ubuntu 22.04, 24.04, 26.04 - Q2 2026 Edge Release (Including CUDA)](https://discuss.circleci.com/t/ubuntu-22-04-24-04-26-04-q2-2026-edge-release-including-cuda/54579).