QRadar SIEM development identified a defect where Docker services fail to start on QRadar appliances that were originally installed at version 7.2.8 or earlier, then upgraded to 7.5.0 Update Pack 2 Interim Fix 2. This service issue prevents applications from starting as the original Red Hat Enterprise (RHEL) install for QRadar 7.2.8 or earlier sets XFS to ftype=0. When QRadar is upgraded to 7.5.0 Update Pack 2 Interim Fix 2, the Docker service expects ftype=1, preventing services from starting as expected.
As always, if there are questions you can ask here. As this issue is only impacts older versions (7.2.8 and earlier) that are updated to 7.5.0 UP2 IF2, there are likely not a lot of users that can experience this issue. However, we created the flash notice to alert users to this potential issue.