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java.lang.InstantiationException: null at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)[?:1.8.0_151] at java.lang.reflect.Constructor.newInstance(Constructor.java:423)[?:1.8.0_151] at java.lang.Class.newInstance(Class.java:442)[?:1.8.0_151] at org.apache.jmeter.protocol.tcp.sampler.TCPSampler.getProtocol(TCPSampler.java:338)[ApacheJMeter_tcp.jar:3.3 r1808647] at org.apache.jmeter.protocol.tcp.sampler.TCPSampler.initSampling(TCPSampler.java:496)[ApacheJMeter_tcp.jar:3.3 r1808647] at org.apache.jmeter.protocol.tcp.sampler.TCPSampler.sample(TCPSampler.java:357)[ApacheJMeter_tcp.jar:3.3 r1808647] at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:498)[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:424)[ApacheJMeter_core.jar:3.3 r1808647] at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:255)[ApacheJMeter_core.jar:3.3 r1808647] at java.lang.Thread.run(Thread.java:748)[?:1.8.0_151]