JMeter Error on connexion with TCP server

Question

I'm trying to launch a JMeter test on TCP chat server. But I have always the same error on initiallisation :

2017-12-03 18:21:13,366 ERROR o.a.j.p.t.s.TCPSampler: org.apache.jmeter.protocol.tcp.sampler.TCPSampler@3b957217 Exception creating: src.camix.TCPClientImpl
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]
2017-12-03 18:21:13,378 DEBUG o.a.j.p.t.s.TCPSampler: Using Protocol Handler: NONE
2017-12-03 18:21:13,378 DEBUG o.a.j.p.t.s.TCPSampler: tcp://127.0.0.1:12345   
2017-12-03 18:21:13,379 WARN o.a.j.p.t.s.TCPSampler: Could not create socket for tcp://127.0.0.1:12345
java.net.ConnectException: Connexion refusée (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method) ~[?:1.8.0_151]
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[?:1.8.0_151]
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[?:1.8.0_151]
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[?:1.8.0_151]
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[?:1.8.0_151]
    at java.net.Socket.connect(Socket.java:589) ~[?:1.8.0_151]
    at org.apache.jmeter.protocol.tcp.sampler.TCPSampler.getSocket(TCPSampler.java:169) [ApacheJMeter_tcp.jar:3.3 r1808647]
    at org.apache.jmeter.protocol.tcp.sampler.TCPSampler.sample(TCPSampler.java:385) [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]

Any ideas ? Tried on Windows/Ubuntu with Oracle and Open JDK ...

Answer 1

Adding ApacheJmeter_core.jar to the project solved the probleme. ApacheJmeter_tcp.jar was not enough