[odl-netconf-client-0] WARN org.opendaylight.netconf.nettyutil.NetconfSessionNegotiator - Unexpected negotiation failure on channel [id: 0x29612f0b, L:/127.0.0.1:42364 - R:/127.0.0.1:46575]
java.lang.IllegalStateException: Timer has already been stopped
	at org.opendaylight.netconf.common.impl.NettyNetconfTimer.newTimeout(NettyNetconfTimer.java:64)
	at org.opendaylight.netconf.common.di.DefaultNetconfTimer.newTimeout(DefaultNetconfTimer.java:40)
	at org.opendaylight.netconf.nettyutil.NetconfSessionNegotiator.start(NetconfSessionNegotiator.java:188)
	at org.opendaylight.netconf.nettyutil.NetconfSessionNegotiator.startNegotiation(NetconfSessionNegotiator.java:134)
	at org.opendaylight.netconf.nettyutil.NetconfSessionNegotiator.channelActive(NetconfSessionNegotiator.java:357)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelActive(AbstractChannelHandlerContext.java:221)
	at org.opendaylight.netconf.transport.ssh.SSHTransportStack.lambda$transportEstablished$0(SSHTransportStack.java:170)
	at org.opendaylight.netconf.transport.ssh.SSHTransportStack.completeUnderlay(SSHTransportStack.java:187)
	at org.opendaylight.netconf.transport.ssh.SSHTransportStack.transportEstablished(SSHTransportStack.java:166)
	at org.opendaylight.netconf.transport.ssh.SSHClient$1.onSuccess(SSHClient.java:122)
	at org.opendaylight.netconf.transport.ssh.SSHClient$1.onSuccess(SSHClient.java:118)
	at com.google.common.util.concurrent.Futures$CallbackListener.run(Futures.java:1132)
	at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:30)
	at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1004)
	at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:767)
	at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:491)
	at com.google.common.util.concurrent.SettableFuture.set(SettableFuture.java:48)
	at org.opendaylight.netconf.transport.ssh.TransportClientSubsystem.lambda$open$0(TransportClientSubsystem.java:49)
	at org.opendaylight.netconf.shaded.sshd.common.future.AbstractSshFuture.lambda$notifyListener$3(AbstractSshFuture.java:178)
	at org.opendaylight.netconf.shaded.sshd.common.util.threads.ThreadUtils.runAsInternal(ThreadUtils.java:64)
	at org.opendaylight.netconf.shaded.sshd.common.future.AbstractSshFuture.notifyListener(AbstractSshFuture.java:177)
	at org.opendaylight.netconf.shaded.sshd.common.future.DefaultSshFuture.notifyListeners(DefaultSshFuture.java:257)
	at org.opendaylight.netconf.shaded.sshd.common.future.DefaultSshFuture.setValue(DefaultSshFuture.java:160)
	at org.opendaylight.netconf.shaded.sshd.client.future.DefaultOpenFuture.setOpened(DefaultOpenFuture.java:58)
	at org.opendaylight.netconf.shaded.sshd.client.channel.AbstractClientChannel.handleOpenSuccess(AbstractClientChannel.java:386)
	at org.opendaylight.netconf.shaded.sshd.common.session.helpers.AbstractConnectionService.channelOpenConfirmation(AbstractConnectionService.java:546)
	at org.opendaylight.netconf.shaded.sshd.common.session.helpers.AbstractConnectionService.process(AbstractConnectionService.java:457)
	at org.opendaylight.netconf.shaded.sshd.common.session.helpers.CurrentService.process(CurrentService.java:109)
	at org.opendaylight.netconf.shaded.sshd.common.session.helpers.AbstractSession.doHandleMessage(AbstractSession.java:625)
	at org.opendaylight.netconf.shaded.sshd.common.session.helpers.AbstractSession.lambda$handleMessage$0(AbstractSession.java:546)
	at org.opendaylight.netconf.shaded.sshd.common.util.threads.ThreadUtils.runAsInternal(ThreadUtils.java:68)
	at org.opendaylight.netconf.shaded.sshd.common.session.helpers.AbstractSession.handleMessage(AbstractSession.java:545)
	at org.opendaylight.netconf.shaded.sshd.common.session.helpers.AbstractSession.decode(AbstractSession.java:1729)
	at org.opendaylight.netconf.shaded.sshd.common.session.helpers.AbstractSession.messageReceived(AbstractSession.java:506)
	at org.opendaylight.netconf.shaded.sshd.common.session.helpers.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:64)
	at org.opendaylight.netconf.shaded.sshd.netty.NettyIoSession.channelRead(NettyIoSession.java:302)
	at org.opendaylight.netconf.shaded.sshd.netty.NettyIoSession$Adapter.channelReadComplete(NettyIoSession.java:409)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelReadComplete(AbstractChannelHandlerContext.java:387)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelReadComplete(DefaultChannelPipeline.java:1434)
	at io.netty.channel.DefaultChannelPipeline.fireChannelReadComplete(DefaultChannelPipeline.java:932)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:172)
	at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.handle(AbstractNioChannel.java:445)
	at io.netty.channel.nio.NioIoHandler$DefaultNioRegistration.handle(NioIoHandler.java:381)
	at io.netty.channel.nio.NioIoHandler.processSelectedKey(NioIoHandler.java:575)
	at io.netty.channel.nio.NioIoHandler.processSelectedKeysOptimized(NioIoHandler.java:550)
	at io.netty.channel.nio.NioIoHandler.processSelectedKeys(NioIoHandler.java:491)
	at io.netty.channel.nio.NioIoHandler.run(NioIoHandler.java:468)
	at io.netty.channel.SingleThreadIoEventLoop.runIo(SingleThreadIoEventLoop.java:206)
	at io.netty.channel.SingleThreadIoEventLoop.run(SingleThreadIoEventLoop.java:177)
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:1073)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at java.base/java.lang.Thread.run(Thread.java:1583)