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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: requestMarshaller	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:228)	at io.grpc.MethodDescriptor.(MethodDescriptor.java:161)	at io.grpc.MethodDescriptor.create(MethodDescriptor.java:151)	at io.grpc.benchmarks.netty.HandlerRegistryBenchmark.setup(HandlerRegistryBenchmark.java:91)	at io.grpc.benchmarks.netty.generated.HandlerRegistryBenchmark_lookupMethod_jmhTest._jmh_tryInit_f_handlerregistrybenchmark0_G(HandlerRegistryBenchmark_lookupMethod_jmhTest.java:395)	at io.grpc.benchmarks.netty.generated.HandlerRegistryBenchmark_lookupMethod_jmhTest.lookupMethod_Throughput(HandlerRegistryBenchmark_lookupMethod_jmhTest.java:57)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.openjdk.jmh.runner.BenchmarkHandler$BenchmarkTask.call(BenchmarkHandler.java:430)	at org.openjdk.jmh.runner.BenchmarkHandler$BenchmarkTask.call(BenchmarkHandler.java:412)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)