After an upgrade of Spotfire to 7.10, 7.11, or 7.12 from Spotfire versions 7.5 to 7.9, after the Node Manager upgrade, the nodes may disappear from the "Nodes & Services" page with an error "Something went wrong, error logged in user-interface.log with ID: xxxx" as seen in the red alert box in the bottom right corner of the "Nodes & Services" page
This may occur because in Spotfire versions 7.5 to 7.9 when a service was updated we kept all the old, previously upgraded services unless and until they were manually deleted by the user. In 7.10 and higher, there is now a one step up upgrade of service which will only maintain a single version, which helps to avoid having multiple old services in the system which are no longer used since they have been replaced by a newer version.
The following will be seen in the user-interface.log after the upgrade:
2018-01-31T13:23:26,708-0500 ; ERROR ; com.spotfire.rs.tools.UI_ERRORS ; 858697ac-eb34-759b-bd2b-e9542cbb6eba: e.nodeNetwork.updatedServices[t[a].installedService.baseServiceConfig.id] is undefined