java.lang.NullPointerException: channel

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Take a look at this blog post on how to set up Grid2 https://goo.gl/rxzbE6. A user related (in the email group on the source) that using older selenium libs solves this exception.

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java.lang.NullPointerException: channel
at io.grpc.netty.WriteQueue.(WriteQueue.java:76)
at io.grpc.netty.NettyClientHandler.startWriteQueue(NettyClientHandler.java:223)
at io.grpc.netty.NettyClientTransport.start(NettyClientTransport.java:172)
at io.grpc.internal.ForwardingConnectionClientTransport.start(ForwardingConnectionClientTransport.java:45)
at io.grpc.internal.TransportSet.startNewTransport(TransportSet.java:215)
at io.grpc.internal.TransportSet.obtainActiveTransport(TransportSet.java:188)
at io.grpc.internal.ManagedChannelImpl$3.getTransport(ManagedChannelImpl.java:637)
at io.grpc.internal.ManagedChannelImpl$3.getTransport(ManagedChannelImpl.java:579)

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