Netconf client fails after server doesn't provide schema

When a Netconf server does not provide an advertised schema, the netconf-connector fails. The connector is unable to recover and does not load any of the other schemas.

$NioEventLoopGroupCloseable-5-1] WARN o.o.c.s.c.n.l.NetconfDeviceCommunicator - RemoteDevice

{test_device}: Error reply from remote device, request: <rpc message-id="m-1" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<get-schema xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-monitoring">
<identifier>Cisco-IOS-XR-qos-ma-oper-sub2</identifier>
<version>2013-07-22</version>
<format>yang</format>
</get-schema>
</rpc>
, response: <rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="m-1">
<rpc-error>
<error-type>application</error-type>
<error-tag>operation-failed</error-tag>
<error-severity>error</error-severity>
</rpc-error>
</rpc-reply>

org.opendaylight.controller.netconf.api.NetconfDocumentedException:
at org.opendaylight.controller.netconf.api.NetconfDocumentedException.fromXMLDocument(NetconfDocumentedException.java:236) ~[bundlefile:na]
at org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.checkSuccessReply(NetconfMessageTransformUtil.java:148) ~[bundlefile:na]
at org.opendaylight.controller.sal.connect.netconf.listener.NetconfDeviceCommunicator.processMessage(NetconfDeviceCommunicator.java:240) [bundlefile:na]
at org.opendaylight.controller.sal.connect.netconf.listener.NetconfDeviceCommunicator.onMessage(NetconfDeviceCommunicator.java:197) [bundlefile:na]
at org.opendaylight.controller.sal.connect.netconf.listener.NetconfDeviceCommunicator.onMessage(NetconfDeviceCommunicator.java:45) [bundlefile:na]
at org.opendaylight.controller.netconf.nettyutil.AbstractNetconfSession.handleMessage(AbstractNetconfSession.java:57) [bundlefile:na]
at org.opendaylight.controller.netconf.nettyutil.AbstractNetconfSession.handleMessage(AbstractNetconfSession.java:28) [bundlefile:na]
at org.opendaylight.protocol.framework.AbstractProtocolSession.channelRead0(AbstractProtocolSession.java:46) [bundlefile:na]
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:103) [bundlefile:4.0.19.Final]
at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:341) [bundlefile:4.0.19.Final]
at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:327) [bundlefile:4.0.19.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163) [bundlefile:4.0.19.Final]
at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:341) [bundlefile:4.0.19.Final]
at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:327) [bundlefile:4.0.19.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163) [bundlefile:4.0.19.Final]
at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:341) [bundlefile:4.0.19.Final]
at io.netty.channel.DefaultChannelHandlerContext.access$700(DefaultChannelHandlerContext.java:30) [bundlefile:4.0.19.Final]
at io.netty.channel.DefaultChannelHandlerContext$8.run(DefaultChannelHandlerContext.java:332) [bundlefile:4.0.19.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:370) [bundlefile:4.0.19.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:353) [bundlefile:4.0.19.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) [bundlefile:4.0.19.Final]
at java.lang.Thread.run(Thread.java:744) [na:1.7.0_45]
2014-08-22 14:24:22.330 BST [nettyThreadgroupModule$NioEventLoopGroupCloseable-5-1] WARN o.o.c.s.c.n.s.NetconfRemoteSchemaYangSourceProvider - RemoteDevice{test_device}

: YANG schema was not successfully retrieved for SourceIdentifier [name=Cisco-IOS-XR-qos-ma-oper-sub2@2013-07-22]. Errors: [RpcError [message=, severity=ERROR, errorType=APPLICATION, tag=operation-failed, applicationTag=null, info=, cause=null]]