With latest Karaf distribution 0.21.1 getting error:

Features installed : odl-netconf-mdsal,odl-restconf-all,odl-netconf-clustered-topology,odl-restconf-openapi,odl-netconf-connector-all

Steps to reproduce:

1. Run Netopeer2 version :0.7.7

docker run -p 8900:830 -it sysrepo/sysrepo-netopeer2:v0.7.7 bash

then

netopeer2-server -d -v3

create-node payload to connect netopeer2 device:

2. Invoke get-config payload:

http://localhost:8181/rests/operations/network-topology:network-topology/topology=topology-netconf/node=nc-sim-120237/yang-ext:mount/ietf-netconf:get-config

3. See payload response:

Attached karaf.log and exception screen shot for reference.