[DEBUG] 2022-05-27 11:50:49.955 [nioEventLoopGroup-3-2] NetconfDeviceCommunicator - RemoteDevice{DCO:DCO:DCO-N9K-LEAF07}: Session established
[TRACE] 2022-05-27 11:50:49.955 [nioEventLoopGroup-3-2] NetconfDeviceCommunicator - RemoteDevice{DCO:DCO:DCO-N9K-LEAF07}: Session advertised capabilities: NetconfSessionPreferences{capabilities={urn:ietf:params:netconf:capability:notification:1.0=DeviceAdvertised, urn:ietf:params:netconf:capability:interleave:1.0=DeviceAdvertised, urn:ietf:params:netconf:capability:validate:1.1=DeviceAdvertised, urn:ietf:params:netconf:capability:confirmed-commit:1.1=DeviceAdvertised, urn:ietf:params:netconf:capability:candidate:1.0=DeviceAdvertised, urn:ietf:params:netconf:capability:rollback-on-error:1.0=DeviceAdvertised, urn:ietf:params:netconf:base:1.1=DeviceAdvertised, urn:ietf:params:netconf:capability:with-defaults:1.0?basic-mode=report-all=DeviceAdvertised, urn:ietf:params:netconf:base:1.0=DeviceAdvertised, urn:ietf:params:netconf:capability:writable-running:1.0=DeviceAdvertised}, moduleBasedCapabilities={(http://cisco.com/ns/yang/cisco-nx-os-device?revision=2021-06-10)Cisco-NX-OS-device=DeviceAdvertised}, rollback=true, monitoring=false, candidate=true, writableRunning=true}
[DEBUG] 2022-05-27 11:50:49.955 [nioEventLoopGroup-3-2] AbstractNetconfSessionNegotiator - Unexpected error while handling negotiation message <hello xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
        
    <capabilities>
                
        <capability>urn:ietf:params:netconf:base:1.0</capability>
                
        <capability>urn:ietf:params:netconf:base:1.1</capability>
                
        <capability>urn:ietf:params:netconf:capability:writable-running:1.0</capability>
                
        <capability>urn:ietf:params:netconf:capability:rollback-on-error:1.0</capability>
                
        <capability>urn:ietf:params:netconf:capability:candidate:1.0</capability>
                
        <capability>urn:ietf:params:netconf:capability:validate:1.1</capability>
                
        <capability>urn:ietf:params:netconf:capability:confirmed-commit:1.1</capability>
                
        <capability>urn:ietf:params:netconf:capability:notification:1.0</capability>
                
        <capability>urn:ietf:params:netconf:capability:interleave:1.0</capability>
                
        <capability>urn:ietf:params:netconf:capability:with-defaults:1.0?basic-mode=report-all</capability>
                
        <capability>http://cisco.com/ns/yang/cisco-nx-os-device?revision=2021-06-10&amp;module=Cisco-NX-OS-device</capability>
            
    </capabilities>
        
    <session-id>1385495234</session-id>
    
</hello>
 on channel [id: 0xbcd9d21c]
java.lang.IllegalStateException: complete already: NetconfSessionPromise@39ce59c8(failure: java.lang.IllegalStateException: Channel closed)
	at io.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:99) ~[netty-common-4.1.69.Final.jar:4.1.69.Final]
	at org.opendaylight.netconf.nettyutil.NetconfSessionPromise.setSuccess(NetconfSessionPromise.java:79) ~[netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.NetconfSessionPromise.setSuccess(NetconfSessionPromise.java:27) ~[netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator.negotiationSuccessful(AbstractNetconfSessionNegotiator.java:279) ~[netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.client.NetconfClientSessionNegotiator.handleMessage(NetconfClientSessionNegotiator.java:93) ~[netconf-client-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator.channelRead(AbstractNetconfSessionNegotiator.java:322) [netconf-netty-util-2.0.14.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:61) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:370) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at java.lang.Thread.run(Thread.java:829) [?:?]
[DEBUG] 2022-05-27 11:50:49.956 [nioEventLoopGroup-3-2] AbstractNetconfSessionNegotiator - Negotiation on channel [id: 0xbcd9d21c] failed
java.lang.IllegalStateException: complete already: NetconfSessionPromise@39ce59c8(failure: java.lang.IllegalStateException: Channel closed)
	at io.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:99) ~[netty-common-4.1.69.Final.jar:4.1.69.Final]
	at org.opendaylight.netconf.nettyutil.NetconfSessionPromise.setSuccess(NetconfSessionPromise.java:79) ~[netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.NetconfSessionPromise.setSuccess(NetconfSessionPromise.java:27) ~[netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator.negotiationSuccessful(AbstractNetconfSessionNegotiator.java:279) [netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.client.NetconfClientSessionNegotiator.handleMessage(NetconfClientSessionNegotiator.java:93) ~[netconf-client-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator.channelRead(AbstractNetconfSessionNegotiator.java:322) [netconf-netty-util-2.0.14.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:61) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:370) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at java.lang.Thread.run(Thread.java:829) [?:?]
[WARN ] 2022-05-27 11:50:49.959 [nioEventLoopGroup-3-2] AbstractNetconfSessionNegotiator - An exception occurred during negotiation with null on channel [id: 0xbcd9d21c]
java.lang.IllegalStateException: complete already: NetconfSessionPromise@39ce59c8(failure: java.lang.IllegalStateException: Channel closed)
	at io.netty.util.concurrent.DefaultPromise.setFailure(DefaultPromise.java:112) ~[netty-common-4.1.69.Final.jar:4.1.69.Final]
	at org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator.negotiationFailed(AbstractNetconfSessionNegotiator.java:285) ~[netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator.channelRead(AbstractNetconfSessionNegotiator.java:325) ~[netconf-netty-util-2.0.14.jar:?]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) [netty-codec-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext.access$600(AbstractChannelHandlerContext.java:61) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.AbstractChannelHandlerContext$7.run(AbstractChannelHandlerContext.java:370) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) [netty-transport-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [netty-common-4.1.69.Final.jar:4.1.69.Final]
	at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.IllegalStateException: complete already: NetconfSessionPromise@39ce59c8(failure: java.lang.IllegalStateException: Channel closed)
	at io.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:99) ~[netty-common-4.1.69.Final.jar:4.1.69.Final]
	at org.opendaylight.netconf.nettyutil.NetconfSessionPromise.setSuccess(NetconfSessionPromise.java:79) ~[netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.NetconfSessionPromise.setSuccess(NetconfSessionPromise.java:27) ~[netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator.negotiationSuccessful(AbstractNetconfSessionNegotiator.java:279) ~[netconf-netty-util-2.0.14.jar:?]
	at org.opendaylight.netconf.client.NetconfClientSessionNegotiator.handleMessage(NetconfClientSessionNegotiator.java:93) ~[netconf-client-2.0.14.jar:?]
	at org.opendaylight.netconf.nettyutil.AbstractNetconfSessionNegotiator.channelRead(AbstractNetconfSessionNegotiator.java:322) ~[netconf-netty-util-2.0.14.jar:?]
	... 20 more