We’ve recently been running into some issues on https://ci.ros2.org, which is the ROS 2 core primary CI server. The problem has been traced to our CI jobs using too much disk space.
One way to reduce our disk space usage is to not install Connext in our CI jobs for RHEL. According to REP-2000, we have never supported rmw_connextdds on RHEL. However, due to an oversight, we have been shipping Connext-on-RHEL support, only in the binary archives, for years. Note that this could not possibly work without additional work from the user; in particular, they would have had to find and download a version of Connext 6.0.1 and install it in the system separately.
Because of all of the above, we recently merged in Don't install Connext on RHEL jobs. by clalancette · Pull Request #789 · ros2/ci · GitHub , which removes rmw_connextdds support on RHEL binary jobs for all ROS 2 distributions. Given the above factors, plus the fact that we’ve never had bug reports about this, we suspect that there no users that will be affected by this. However, if you have been depending on this support, please respond to this post and we can figure something out.