java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at ru.semiot.platform.deviceproxyservice.manager.WAMPClient.publish(WAMPClient.java:38)
at ru.semiot.platform.deviceproxyservice.manager.DeviceManagerImpl.publish(DeviceManagerImpl.java:112)
at ru.semiot.platform.drivers.winghouse.machinetool.DeviceDriverImpl.publish(DeviceDriverImpl.java:120)
at ru.semiot.platform.drivers.winghouse.machinetool.DeviceHandler.sendMessage(DeviceHandler.java:83)
at ru.semiot.platform.drivers.winghouse.machinetool.DeviceHandler.processingPacket(DeviceHandler.java:48)
at ru.semiot.platform.drivers.winghouse.machinetool.DeviceHandler.channelRead0(DeviceHandler.java:30)
at ru.semiot.platform.drivers.winghouse.machinetool.DeviceHandler.channelRead0(DeviceHandler.java:12)
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846)
at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:93)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:110)
at java.lang.Thread.run(Thread.java:745)

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