The systemtap-server doesn't work because it is not built with libavahi-devel. 

When systemtap-server be launched, there have following messages in
systemtap-server log:

Mon Apr 15 12:45:03 2019: Certificate is valid
Mon Apr 15 12:45:03 2019: Unable to advertise presence on the network. Avahi is
not available

It shows avahi service is not available when avahi is already launched.

Checking the systemtap build log on OBS, there have following messages in build
log:

[   38s] checking for avahi... no
[   38s] configure: WARNING: some compile-server functionality will be
restricted, cannot find avahi development files


After add BuildRequires for libavahi-devel, this issue can be cured.