"trying to connect the Opendaylight BGP module to bagpipe router. The BGP module accepts the connection from bagpipe but it fails in initializing the channel, throws the following exception and do not send open and keep alive messages (but receive open and keep alive messages from bagpipe)."

io.netty.channel.ChannelPipelineException: org.opendaylight.protocol.bgp.rib.impl.BGPMessageHeaderDecoder is not a @Sharable handler, so can't be added or removed multiple times.
at io.netty.channel.DefaultChannelPipeline.checkMultiplicity(DefaultChannelPipeline.java:464)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.DefaultChannelPipeline.addLast0(DefaultChannelPipeline.java:136)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.DefaultChannelPipeline.addLast(DefaultChannelPipeline.java:129)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.DefaultChannelPipeline.addLast(DefaultChannelPipeline.java:257)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.DefaultChannelPipeline.addLast(DefaultChannelPipeline.java:244)[112:io.netty.transport:4.0.30.Final]
at org.opendaylight.protocol.bgp.rib.impl.BGPDispatcherImpl$BGPChannel$1.initializeChannel(BGPDispatcherImpl.java:193)[193:org.opendaylight.bgpcep.bgp-rib-impl:0.5.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.protocol.BGPReconnectPromise$1.initializeChannel(BGPReconnectPromise.java:58)[193:org.opendaylight.bgpcep.bgp-rib-impl:0.5.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.protocol.BGPReconnectPromise$3.initChannel(BGPReconnectPromise.java:83)[193:org.opendaylight.bgpcep.bgp-rib-impl:0.5.0.SNAPSHOT]
at org.opendaylight.protocol.bgp.rib.impl.protocol.BGPReconnectPromise$3.initChannel(BGPReconnectPromise.java:80)[193:org.opendaylight.bgpcep.bgp-rib-impl:0.5.0.SNAPSHOT]
at io.netty.channel.ChannelInitializer.channelRegistered(ChannelInitializer.java:68)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRegistered(AbstractChannelHandlerContext.java:133)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRegistered(AbstractChannelHandlerContext.java:119)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRegistered(DefaultChannelPipeline.java:733)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.register0(AbstractChannel.java:450)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.access$100(AbstractChannel.java:378)[112:io.netty.transport:4.0.30.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe$1.run(AbstractChannel.java:424)[112:io.netty.transport:4.0.30.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:356)[100:io.netty.common:4.0.30.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357)[112:io.netty.transport:4.0.30.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:110)[100:io.netty.common:4.0.30.Final]
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)[100:io.netty.common:4.0.30.Final]