jmeter报ERROR o.a.j.JMeter: Uncaught exception: java.lang.NoClassDefFoundError: kg/apc/perfmon/metrics/MetricParams

有个项目做性能测试，需监测服务器服务，jmeter成功安装插件jmeter jp@gc - PerfMon Metrics Collector，运行脚本报如下错误：

ERROR o.a.j.JMeter: Uncaught exception:
java.lang.NoClassDefFoundError: kg/apc/perfmon/metrics/MetricParams
at kg.apc.jmeter.perfmon.PerfMonCollector.initiateConnector(PerfMonCollector.java:200) ~[jmeter-plugins-perfmon-2.1.jar:?]
at kg.apc.jmeter.perfmon.PerfMonCollector.initiateConnectors(PerfMonCollector.java:175) ~[jmeter-plugins-perfmon-2.1.jar:?]
at kg.apc.jmeter.perfmon.PerfMonCollector.testStarted(PerfMonCollector.java:126) ~[jmeter-plugins-perfmon-2.1.jar:?]
at org.apache.jmeter.reporters.ResultCollector.testStarted(ResultCollector.java:350) ~[ApacheJMeter_core.jar:5.0 r1840935]
at kg.apc.jmeter.vizualizers.CorrectedResultCollector.testStarted(CorrectedResultCollector.java:28) ~[jmeter-plugins-cmn-jmeter-0.7.jar:?]
at org.apache.jmeter.engine.StandardJMeterEngine.notifyTestListenersOfStart(StandardJMeterEngine.java:215) ~[ApacheJMeter_core.jar:5.0 r1840935]
at org.apache.jmeter.engine.StandardJMeterEngine.run(StandardJMeterEngine.java:384) ~[ApacheJMeter_core.jar:5.0 r1840935]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_281]

报错原因：说是未找到相应类库

解决方案：删除报错指定的jar包（jmeter-plugins-perfmon-2.1.jar），重新下载Perfmon插件，运行jmeter就可以了。