PI = Prime Infrastructure; 9800 is the Cisco 9800-CL (WLC switch)
I too have been running into issues with the Coral Services since upgrading to PI 3.10.x. TAC has always just had me stop and restart services to resolve.
We have this problem too and all of the Routers, Switches, LWAPP and autonomous WAP are in Prime and the CDP is is enabled. Check the device and for some they are reporting.
Example from report:
mxgua02lw0144:d3:ca:fa:b7:6e172.21.2.201AIR-CAP3502I-A...
