java - 使用 Opendaylight 通过 NETCONF 检索列表时出现错误 "Duplicate namespace in XML input"

Question

我使用 Opendaylight(版本 0.10.1)作为 NETCONF 客户端向 Netopeer2 服务器发送请求。
我的 YANG 模型是一个第三方模型，由多个模块组成，其中包含多个列表元素等属性。
这将转换为 XML 请求和响应对，如下所示(简化版):

请求:

<rpc message-id="m-3" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
    <get-config>
        <source>
            <running/>
        </source>
        <filter xmlns:ns0="urn:ietf:params:xml:ns:netconf:base:1.0" ns0:type="subtree">
            <TopElement xmlns="top-element">
                <id>1</id>
            </TopElement>
        </filter>
    </get-config>
</rpc>

回应:

<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="m-3">
    <data>
        <TopElement xmlns="top-element">
            <id>1</id>
            <ParentElement xmlns="parent-element">
                <id>1</id>
                <ChildElement1 xmlns="child-element1">
                    <id>1</id>
                    <attributes>
                        ...
                    </attributes>
                </ChildElement1>
                <ChildElement1 xmlns="child-element1">
                    <id>2</id>
                    <attributes>
                        ...
                    </attributes>
                </ChildElement1>
                <ChildElement2 xmlns="child-element2">
                    <id>1</id>
                    <attributes>
                        ...
                    </attributes>
                </ChildElement2>
                <ChildElement1 xmlns="child-element1">
                    <id>3</id>
                    <attributes>
                        ...
                    </attributes>
                </ChildElement1>
            </ParentElement>
        </TopElement>
    </data>
</rpc-reply>

但是，这样的请求会导致“Master is down”错误，我已尝试使用 Karaf 日志文件进行调查。我将问题追溯到 akka.pattern.AskTimeoutException 超时，这似乎是由 XML 响应的解析错误引起的:

2020-04-08T09:09:11,733 | ERROR | nioEventLoopGroupCloseable-3-1 | AbstractFuture                   | 42 - com.google.guava - 25.1.0.jre |  -  | RuntimeException while executing runnable CallbackListener{org.opendaylight.netconf.sal.connect.netconf.sal.NetconfDeviceRpc$1@165744d4} with executor MoreExecutors.directExecutor()
java.lang.IllegalArgumentException: Failed to parse data response [data: null]
    at org.opendaylight.netconf.sal.connect.netconf.schema.mapping.NetconfMessageTransformer.toRpcResult(NetconfMessageTransformer.java:285) ~[386:org.opendaylight.netconf.sal-netconf-connector:1.9.1]
    at org.opendaylight.netconf.sal.connect.netconf.schema.mapping.NetconfMessageTransformer.toRpcResult(NetconfMessageTransformer.java:75) ~[386:org.opendaylight.netconf.sal-netconf-connector:1.9.1]
    at org.opendaylight.netconf.sal.connect.netconf.sal.NetconfDeviceRpc$1.onSuccess(NetconfDeviceRpc.java:60) ~[386:org.opendaylight.netconf.sal-netconf-connector:1.9.1]
    at org.opendaylight.netconf.sal.connect.netconf.sal.NetconfDeviceRpc$1.onSuccess(NetconfDeviceRpc.java:57) ~[386:org.opendaylight.netconf.sal-netconf-connector:1.9.1]
    at com.google.common.util.concurrent.Futures$CallbackListener.run(Futures.java:1355) ~[42:com.google.guava:25.1.0.jre]
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:398) ~[42:com.google.guava:25.1.0.jre]
    at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1024) [42:com.google.guava:25.1.0.jre]
    at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:866) [42:com.google.guava:25.1.0.jre]
    at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:689) [42:com.google.guava:25.1.0.jre]
    at org.opendaylight.netconf.sal.connect.netconf.listener.UncancellableFuture.set(UncancellableFuture.java:45) [386:org.opendaylight.netconf.sal-netconf-connector:1.9.1]
    at org.opendaylight.netconf.sal.connect.netconf.listener.NetconfDeviceCommunicator.processMessage(NetconfDeviceCommunicator.java:338) [386:org.opendaylight.netconf.sal-netconf-connector:1.9.1]
    at org.opendaylight.netconf.sal.connect.netconf.listener.NetconfDeviceCommunicator.onMessage(NetconfDeviceCommunicator.java:270) [386:org.opendaylight.netconf.sal-netconf-connector:1.9.1]
    at org.opendaylight.netconf.sal.connect.netconf.listener.NetconfDeviceCommunicator.onMessage(NetconfDeviceCommunicator.java:49) [386:org.opendaylight.netconf.sal-netconf-connector:1.9.1]
    at org.opendaylight.netconf.nettyutil.AbstractNetconfSession.handleMessage(AbstractNetconfSession.java:64) [379:org.opendaylight.netconf.netty-util:1.6.1]
    at org.opendaylight.netconf.nettyutil.AbstractNetconfSession.channelRead0(AbstractNetconfSession.java:187) [379:org.opendaylight.netconf.netty-util:1.6.1]
    at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [71:io.netty.transport:4.1.34.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359) [71:io.netty.transport:4.1.34.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:345) [71:io.netty.transport:4.1.34.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:337) [71:io.netty.transport:4.1.34.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:323) [66:io.netty.codec:4.1.34.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:297) [66:io.netty.codec:4.1.34.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359) [71:io.netty.transport:4.1.34.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:345) [71:io.netty.transport:4.1.34.Final]
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:337) [71:io.netty.transport:4.1.34.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:323) [66:io.netty.codec:4.1.34.Final]
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:297) [66:io.netty.codec:4.1.34.Final]
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359) [71:io.netty.transport:4.1.34.Final]
    at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:38) [71:io.netty.transport:4.1.34.Final]
    at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:350) [71:io.netty.transport:4.1.34.Final]
    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) [68:io.netty.common:4.1.34.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404) [68:io.netty.common:4.1.34.Final]
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:495) [71:io.netty.transport:4.1.34.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:905) [68:io.netty.common:4.1.34.Final]
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [68:io.netty.common:4.1.34.Final]
    at java.lang.Thread.run(Thread.java:748) [?:?]
Caused by: javax.xml.stream.XMLStreamException: ParseError at [row,col]:[-1,-1]
Message: Duplicate namespace "child-element1" element "ChildElement1" in XML input
    at org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream.read(XmlParserStream.java:383) ~[410:org.opendaylight.yangtools.yang-data-codec-xml:2.1.10]
    at org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream.read(XmlParserStream.java:321) ~[410:org.opendaylight.yangtools.yang-data-codec-xml:2.1.10]
    at org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream.read(XmlParserStream.java:403) ~[410:org.opendaylight.yangtools.yang-data-codec-xml:2.1.10]
    at org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream.read(XmlParserStream.java:321) ~[410:org.opendaylight.yangtools.yang-data-codec-xml:2.1.10]
    at org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream.read(XmlParserStream.java:403) ~[410:org.opendaylight.yangtools.yang-data-codec-xml:2.1.10]
    at org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream.parse(XmlParserStream.java:214) ~[410:org.opendaylight.yangtools.yang-data-codec-xml:2.1.10]
    at org.opendaylight.yangtools.yang.data.codec.xml.XmlParserStream.traverse(XmlParserStream.java:244) ~[410:org.opendaylight.yangtools.yang-data-codec-xml:2.1.10]
    at org.opendaylight.netconf.sal.connect.netconf.schema.mapping.NetconfMessageTransformer.toRpcResult(NetconfMessageTransformer.java:281) ~[386:org.opendaylight.netconf.sal-netconf-connector:1.9.1]
    ... 34 more

真的是因为名单的原因吗？ XML 符合 RFC 7950 :

7.8.5. XML Encoding Rules

A list is encoded as a series of XML elements, one for each entry inthe list. Each element's local name is the list's identifier, and itsnamespace is the module's XML namespace (see Section 7.1.3). There isno XML element surrounding the list as a whole.

如有任何建议，我们将不胜感激。谢谢!

Answer 1

我不确定我知道答案，但问题可能只是某些列表项的名称相同？如:

<ChildElement1 xmlns="child-element1">

我知道 ID 是唯一的，但这对我来说很突出。