when I update yang , I can not read data via yangui.

Repro Steps:
step-1:I created two yang:sample.yang、sample-argument.yang
step-2:put data via yangui
url:
http://127.0.0.1:8181/restconf/config/sample:sample

put body
=========without this line=========
{
"sample":

{ "nodeTest": "nodeTest", "first-argument": "first" }

}
=========without this line ========

step-3:modify sample-argument.yang , add leaf node to argument-group
step-4:get data via yangui,then occur execption

============exception info =================
java.lang.IllegalStateException: Unknown augmentation node detected, identified by: [(urn:opendaylight:params:xml:ns:yang:sample-argument?revision=2015-01-05)first-argument], in: container sample
at com.google.common.base.Preconditions.checkState(Preconditions.java:197)
at org.opendaylight.yangtools.yang.data.impl.schema.SchemaUtils.findSchemaForAugment(SchemaUtils.java:115)
at org.opendaylight.yangtools.yang.data.impl.codec.SchemaTracker.startAugmentationNode(SchemaTracker.java:247)
at org.opendaylight.yangtools.yang.data.impl.codec.xml.XMLStreamNormalizedNodeStreamWriter.startAugmentationNode(XMLStreamNormalizedNodeStreamWriter.java:257)
at org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter.wasProcessedAsCompositeNode(NormalizedNodeWriter.java:211)
at org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter.write(NormalizedNodeWriter.java:100)
at org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter.writeChildren(NormalizedNodeWriter.java:169)
at org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter.wasProcessedAsCompositeNode(NormalizedNodeWriter.java:194)
at org.opendaylight.yangtools.yang.data.api.schema.stream.NormalizedNodeWriter.write(NormalizedNodeWriter.java:100)
at org.opendaylight.controller.sal.rest.impl.RestconfDelegatingNormalizedNodeWriter.write(RestconfDelegatingNormalizedNodeWriter.java:37)
at org.opendaylight.controller.sal.rest.impl.RestconfDelegatingNormalizedNodeWriter.write(RestconfDelegatingNormalizedNodeWriter.java:19)
at org.opendaylight.controller.sal.rest.impl.NormalizedNodeXmlBodyWriter.writeNormalizedNode(NormalizedNodeXmlBodyWriter.java:116)
at org.opendaylight.controller.sal.rest.impl.NormalizedNodeXmlBodyWriter.writeTo(NormalizedNodeXmlBodyWriter.java:94)
at org.opendaylight.controller.sal.rest.impl.NormalizedNodeXmlBodyWriter.writeTo(NormalizedNodeXmlBodyWriter.java:44)
at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:306)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1479)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1496)
at org.eclipse.jetty.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:247)
at org.eclipse.jetty.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:210)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:82)
at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:294)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1467)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:501)
at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:69)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1086)
at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:240)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:429)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1020)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:75)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
at org.eclipse.jetty.server.Server.handle(Server.java:370)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:494)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:971)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1033)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:696)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:53)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
at java.lang.Thread.run(Thread.java:744)
=================end of exception info ========================

I have a solution to fix it:

modify
============SchemaUtils.findAugment in yang-data-impl ========
if(qNamesFromAugment.equals(qNames)) {
return Optional.of(augment);
}
===============end==============================

to
============SchemaUtils.findAugment in yang-data-impl ========
if(qNamesFromAugment.containsAll(qNames)) {
return Optional.of(augment);
}
===============end==============================