We have a curtin test that runs (simplified) apt-get update apt-get install linux-image-generic-hwe-16.04 The jenkins run [1] failed on Monday (06-11), console log at [2] with the following:
| Some packages could not be installed. This may mean that you have | requested an impossible situation or if you are using the unstable | distribution that some required packages have not yet been created | or been moved out of Incoming. | The following information may help to resolve the situation: | The following packages have unmet dependencies: | linux-image-generic-hwe-16.04 : | Depends: linux-image-4.13.0-45-generic but it is not installable | Depends: linux-image-extra-4.13.0-45-generic but it is not installable | Recommends: thermald but it is not going to be installed | E: Unable to correct problems, you have held broken packages. So it would appear that we hit an unfortunate race when linux-meta-hwe [3] was in xenial-updates but linux-hwe [4] was not. Per the email time stamps in those messages there was a 4 second window when this could have occurred. We hit this issue around 15:36, around 20 minutes after the time stamp on the xenial-changes email (15:14). I realize that you probably can't trust those timestamps 100%, that the publisher runs on some cycle, and that archive sync is non-atomic. If the email messages are to be believed, linux-meta-hwe [3] was accepted before linux-hwe [4]. linux-meta-hwe depends on a specific version of linux-hwe, but linux-hwe has no dependency on linux-meta-hwe. It seems that at very least linux-hwe should be let in before linux-meta-hwe. We've seen similar issues with grub2 and grub2-signed. I believe those two are co-dependent making them trickier. This is a stable release that had its canonical archive in a broken state. Can anything be done to stop this from occurring? Scott -- [1] https://jenkins.ubuntu.com/server/view/cloud-init,%20curtin,%20streams/job/curtin-vmtest-daily-x/120/ [2] http://paste.ubuntu.com/p/23JwPy76tY/ [3] https://lists.ubuntu.com/archives/xenial-changes/2018-June/021385.html [4] https://lists.ubuntu.com/archives/xenial-changes/2018-June/021386.html -- ubuntu-devel mailing list ubuntu-devel@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel