[NETCONF-498] Nitrogen snapshot fails to read device data via Draft18

Mon, 31 Jan 2022 17:42:57 +0000

Seen on karaf-0.7.2-20180115.004816-253.tar.gz

To reproduce:
Start ODL with odl-restconf and odl-netconf-topology.
Start testtool:

$ java -Xmx256M -Dorg.apache.sshd.registerBouncyCastle=false -jar netconf-testtool-1.3.1-executable.jar --device-count 1 --debug true --schemas-dir schema --md-sal true

(It does not really matter which models are in "schema" directory.)

Connect to the testtool:

$ curl -v -u admin:admin -H "Content-Type:application/json" -X PUT -d '{"netconf-topology:node":{"node-id":"netconf-test-device","netconf-node-topology:host":"127.0.0.11","netconf-node-topology:port":17830,"netconf-node-topology:username":"admin","netconf-node-topology:password":"admin","netconf-node-topology:tcp-only":false,"netconf-node-topology:keepalive-delay":0}}' http://127.0.0.1:8181/restconf/18/data/network-topology:network-topology/topology=topology-netconf/node=netconf-test-device ;echo

(I think Draft02 URL would work just as well.)

Wait until device is connected

$ curl -u admin:admin http://127.0.0.1:8181/restconf/18/data/network-topology:network-topology/topology=topology-netconf/node=netconf-test-device ;echo

(Search for "connected" instead of "connecting".)

Attempt to see the mounted data:

$ curl -u admin:admin http://127.0.0.1:8181/restconf/18/data/network-topology:network-topology/topology=topology-netconf/node=netconf-test-device/yang-ext:mount

You will see a long stacktrace. Draft02 can be used to verify the data can be read:

curl -u admin:admin http://127.0.0.1:8181/restconf/operational/network-topology:network-topology/topology/topology-netconf/node/netconf-test-device/yang-ext:mount ;echo

Using PUT and DELETE on Draft18 works, and http status returned confirms data is manipulated, it is just GET which fails.

The main reason for status 500 seem to be this exception:

java.lang.IllegalArgumentException: Could not find schema for node (urn:ietf:params:xml:ns:netconf:base:1.0?revision=2011-06-01)data in EffectiveSchemaContext

And looking at karaf.log at debug level this seems to match with testtool response (about empty configuration data):

2018-01-11 19:13:42,135 | DEBUG | oupCloseable-6-1 | NetconfDeviceCommunicator | 310 - org.opendaylight.netconf.sal-netconf-connector - 1.6.2.SNAPSHOT | RemoteDevice{netconf-test-device}: Message received <rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="m-1">
<data/>
</rpc-reply>

Apparently, the <data> element is not unboxed properly.

OpenDaylight JIRA

[NETCONF-498] Nitrogen snapshot fails to read device data via Draft18