https://jira.opendaylight.org This file is an XML representation of an issue en-us 8.20.10 820010 22-06-2022 https://jira.opendaylight.org/browse/NETCONF-767 netconf <p>Restconf returns "Request could not be completed because the relevant data model content does not exist network-topology:network-topology/topology/topology-netconf/node/{device-name}/yang-ext:mount/Cisco-IOS-XR-mpls-te-oper:mpls-te/tunnel-current-lsp/s2l/resv-rro"</p> <p> </p> <p>container tunnel-current-lsp {<br/>     description "xxxx";<br/>     list s2l {<br/>        description  "xxx";<br/>        list resv-rro {               <br/>          description "yyy";               <br/>           leaf xyz </p> { } <p>       }<br/>     }</p> <p>}</p> <p> </p> <p>When unkeyed and operational list is present in device yang , we were unable to fetch that particular list.</p> <p> </p> NETCONF-767

Unable to fetch mounted device's data when unkeyed and operational list present in device yang

Bug Medium Confirmed Unresolved Ivan Martiniak Sarguna Dharani Fri, 5 Feb 2021 15:00:36 +0000 Tue, 1 Feb 2022 19:14:55 +0000 2.0.13 netconf 0 2 <p>So this needs a stack trace to go with it</p> <p>Hi Robert,</p> <p> </p> <p>Replicated the issue using the test case<br/>  <br/> When netconf convert xml to Normalized node , we hit getDirectChild of Yangtools to find exact node using path arguments.</p> <p> </p> <p>-------------------</p> <p>NETCONF</p> <p>---------------------</p> <p>package org.opendaylight.netconf.sal.connect.netconf.util;</p> <p>import java.io.IOException;<br/> import java.net.URISyntaxException;<br/> import java.util.Optional;<br/> import javax.xml.stream.XMLStreamException;<br/> import org.opendaylight.netconf.api.ModifyAction;<br/> import org.opendaylight.netconf.util.NetconfUtil;<br/> import org.opendaylight.yangtools.rfc8528.data.api.MountPointContext;<br/> import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;<br/> import org.opendaylight.yangtools.yang.data.api.schema.DOMSourceAnyxmlNode;<br/> import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;<br/> import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;<br/> import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;<br/> import org.opendaylight.yangtools.yang.data.impl.schema.NormalizedNodeResult;<br/> import org.slf4j.Logger;<br/> import org.slf4j.LoggerFactory;<br/> import org.xml.sax.SAXException;</p> <p>/**</p> <ul> <li>Transforms rpc structures to normalized nodes and vice versa.<br/> */<br/> class NetconfRpcStructureTransformer implements RpcStructureTransformer {<br/> private static final Logger LOG = LoggerFactory.getLogger(NetconfRpcStructureTransformer.class);</li> </ul> <p>private final MountPointContext mountContext;</p> <p>NetconfRpcStructureTransformer(final MountPointContext mountContext)</p> {       this.mountContext = mountContext; } <p>@Override<br/> public Optional&lt;NormalizedNode&lt;?, ?&gt;&gt; selectFromDataStructure(<br/> final DataContainerChild&lt;? extends YangInstanceIdentifier.PathArgument, ?&gt; data,<br/> final YangInstanceIdentifier path) {<br/>         if (data instanceof DOMSourceAnyxmlNode) {<br/>             final NormalizedNodeResult node;<br/>             try</p> {                 node = NetconfUtil.transformDOMSourceToNormalizedNode(mountContext,                         ((DOMSourceAnyxmlNode)data).getValue());                   *Optional&lt;NormalizedNode&lt;?, ?&gt;&gt; result = NormalizedNodes.findNode(node.getResult(),*                                                   *path.getPathArguments());*                 return result;             } <p>catch (final XMLStreamException | URISyntaxException | IOException | SAXException e)</p> {                        LOG.error("Cannot parse anyxml.", e);               return Optional.empty();             } <p>        } else</p> {             return NormalizedNodes.findNode(data, path.getPathArguments());            } <p>       }</p> <p>  .....</p> <p>----------------</p> <p>YANGTOOLS</p> <p>-----------------</p> <p>package org.opendaylight.yangtools.yang.data.api.schema;</p> <p>....</p> <p>/**</p> <ul> <li>A set of utility methods for interacting with {@link NormalizedNode} objects.<br/> */<br/> @Beta<br/> public final class NormalizedNodes {</li> </ul> <p> </p> <p>......</p> <p>public static Optional&lt;NormalizedNode&lt;?, ?&gt;&gt; findNode(final Optional&lt;NormalizedNode&lt;?, ?&gt;&gt; parent,<br/> final Iterable&lt;PathArgument&gt; relativePath) {<br/>          final Iterator&lt;PathArgument&gt; pathIterator = requireNonNull(relativePath, "Relative path must not be null")<br/>                       .iterator();<br/>           Optional&lt;NormalizedNode&lt;?, ?&gt;&gt; currentNode = requireNonNull(parent, "Parent must not be null");<br/>           while (currentNode.isPresent() &amp;&amp; pathIterator.hasNext())</p> {                     *currentNode = getDirectChild(currentNode.get(), pathIterator.next());*            } <p>         return currentNode;</p> <p>}</p> <p> </p> <p>PFA for  changes added in test case to replicate UnkeyedListNode issue.</p> <p><span class="nobr"><a href="https://jira.opendaylight.org/secure/attachment/16100/16100_YANGTOOLS-1221-testcase.docx" title="YANGTOOLS-1221-testcase.docx attached to NETCONF-767">YANGTOOLS-1221-testcase.docx^{<img class="rendericon" src="https://jira.opendaylight.org/images/icons/link_attachment_7.gif" height="7" width="7" align="absmiddle" alt="" border="0"/>}</a></span></p> <p> </p> <p>Please let me know if you need more information.</p> <p>Well, children of UnkeyedListNode are not adressable through PathArgument. They can only be either iterated or selected by offset.</p> <p>For the code in your test case, this translates to the question: how would NormalizedNodes know to select the child at offset 0 (as opposed to any other offset)?</p> <p>This needs to be fixed NETCONF-side.</p> <p>Can you post karaf logs with NETCONF debugs enabled, please?<br/> I believe the problem here is that NETCONF code is trying something funky, i.e. attempting to access a single item by a PathArgument (as per my previous comment).</p> Development Rank 0|i03wzb: