Description:
After upgrading from 8.x to 9.1, not all URL groups are appearing under Frontends|Apps|rootContext. This was working in 8.x.
Solution:
Per design, APM puts the frontend marker on the filter. To get required metrics like application name and URL groupings to appear, either disable the servlet filter tracing or remove the servlet tracer on filter This will result in loss of parameter based detail metrics which is very minor.