This document describes the policy for updating the openjdk-N packages, and to introduce new openjdk-N packages in Ubuntu LTS versions. OpenJDK upstream has long supported LTS releases (11, next one 17), which are normally maintained in the distro. OpenJDK versions in between OpenJDK LTS version are only supported for around six months. Having such a version in an Ubuntu non-LTS release make sense, because the support time frame is around the same for both.
We want to ship the short term support OpenJDK version to get those exposed to users and developers, but want to drop them again when they become unsupported. Therefore we are not shipping any short term OpenJDK version in an Ubuntu LTS release, and only providing the package in the updates pocket.
A new OpenJDK short term support version has to be upload to the current development series first, then to the most recent Ubuntu LTS release. At most two OpenJDK short term support versions can be found in an Ubuntu LTS release.
These versions are not used by default, minimizing the risk to affect other packages in the archive. The test results run during the build should look reasonably well. The autopkg tests are also run for these uploads, however they not meaningful at all, because they are run against the default Java version of the Ubuntu LTS release.
Requesting the SRU
The SRU should be done with a single process bug for this stable release exception, instead of individual bug reports for individual bug fixes. However, individual bugs may be referenced in the from the changelog but each of those bugs will need to independently verified and commented on for the SRU to be considered complete.