Could not fetch schema node: /openconfig-interfaces:interfaces

[ygorelik]

Current Behavior

When trying to get BGP and Interfaces using openconfig model, the YDK fails to encode interfaces payload with this error:

YPYCoreError:  Could not fetch schema node: /openconfig-interfaces:interfaces

The error appears due to missing reference to SchemaNodeImpl in the lys_node->priv.

Your Script

        # Initialize services
        provider = NetconfServiceProvider("127.0.0.1", "admin", "admin", 12022, )
        crud = CRUDService()
        codec_service = CodecService()
        codec_provider = CodecServiceProvider()
        codec_provider.encoding = EncodingFormat.XML
         
        # First, create the top-level Bgp and Interface objects
        bgp_filter = openconfig_bgp.Bgp()
        int_filter = openconfig_interfaces.Interfaces()
    
        # Create read filter
        read_filter = Filter(bgp_filter, int_filter)

        # Call the CRUD read
        result = crud.read_config(provider, read_filter)
    
        # Print configuration in XML format
        for entity in result:
            xml_encode = codec_service.encode(codec_provider, entity)
            print(xml_encode)

Logs

test.log

System Information

Python2.7
YDK0.7.1a

[ygorelik]

Found the root cause: the "openconfig-interfaces" module schema was populated in Libyang repository, but not in YDK. Added corresponding check to assure that the module schema is populated in YDK. Added corresponding debug statements. Added sanity test.

See log file for details
test_727.log