Troubleshooting adop Cutover Hung or Port Conflicts in Oracle EBS R12.2
When applying CPU (Critical Patch Update) patches or standard patch sets in Oracle E-Business Suite (EBS) R12.2, the Online Patching Utility (adop) relies on a strict sequence of execution phases: prepare, apply, finalize, cutover, and cleanup. Among these, the cutover phase is the most critical operational event. It performs the actual switchover between the RUN and PATCH file systems (fs1 and fs2), bringing down the application services, swapping the dual file system mount points/environment variables, and bringing the new application services back online. A common real-world issue DBAs face during cutover is an unexpected hang where adop appears stuck while shutting down internal managers or service controllers. In this post, we will walk through a live diagnostic scenario during a July 2026 CPU Patching cycle, analyze why orphaned Mobile Supply Chain Applications / Mobile Web Applications (MSCA/MWA) processes block adop, dive deep into Linux process hierarchies (PPID=1), ...