jmeter监控服务器启动serveragent报错

jmeter监控服务器启动serveragent报错。
ERROR 2022-01-06 09:59:28.811 [kg.apc.p] (): Error executing command
java.lang.UnsupportedOperationException: Unknown command [14]: 'GET / HTTP/1.1'
at kg.apc.perfmon.PerfMonMetricGetter.processCommand(PerfMonMetricGetter.java:86)
at kg.apc.perfmon.PerfMonMetricGetter.processNextCommand(PerfMonMetricGetter.java:100)
at kg.apc.perfmon.PerfMonWorker.read(PerfMonWorker.java:198)
at kg.apc.perfmon.PerfMonWorker.processCommands(PerfMonWorker.java:87)
at kg.apc.perfmon.AgentTool.processParams(AgentTool.java:75)
at kg.apc.cmdtools.PluginsCMD.processParams(PluginsCMD.java:63)
at kg.apc.cmdtools.PluginsCMD.processParams(PluginsCMD.java:23)
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 kg.apc.cmd.UniversalRunner.main(UniversalRunner.java:174)

防火墙端口已经开了，还是不行，不知道什么情况