Merge pull request #69 from gradescope/ibrahim/GSC-2829/glibc-issue-u…

…pdate

Add a notice about the glibc issue to our updates page

docs/updates.md

@@ -2,6 +2,21 @@
 
 Here are some updates we've made to our autograder platform. If you have any questions or issues with any of these changes, please email [help@gradescope.com](mailto:help@gradescope.com).
 
+## March 17th, 2022
+
+An upstream update to our underlying host OS introduced a conflict with the default Ubuntu 18.04 base image used for building autograders. For users installing certain packages that depend on glibc, this may have manifested in the build error below:
+
+```
+ERROR: Your kernel version indicates a revision number
+of 255 or greater. Glibc has a number of built in
+assumptions that this revision number is less than 255.
+If you\'ve built your own kernel, please make sure that any
+custom version numbers are appended to the upstream
+kernel number with a dash or some other delimiter.
+```
+
+We have temporarily worked around this issue by building a new version of our base image. This should resolve the issue for now, until a more permanent fix is released by the Ubuntu team. Affected users will need to re-upload their autograder zip file to successfully update their autograder image.
+
 ## September 4th, 2020
 
 - The Ubuntu, Fedora, and CentOS base images had their default Python installation upgraded from Python 2 to Python 3.