我收到此错误，但我不知道我使用了任何插件......我该怎么做才能解决这个问题？
[root@centos6 bin]# ./jmeter -n -t ../scripts/Beta/Beta_Load_Test_Plan1.jmx
Error in NonGUIDriver java.lang.IllegalArgumentException: Problem loading XML from:'/opt/jmeter/bin/../scripts/Beta/Beta_Load_Test_Plan1.jmx', conversion error com.thoughtworks.xstream.converters.ConversionException: kg.apc.jmeter.samplers.DummySampler : kg.apc.jmeter.samplers.DummySampler
---- Debugging information ----
message : kg.apc.jmeter.samplers.DummySampler
cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException
cause-message : kg.apc.jmeter.samplers.DummySampler
class : org.apache.jorphan.collections.ListedHashTree
required-type : org.apache.jorphan.collections.ListedHashTree
converter-type : org.apache.jmeter.save.converters.HashTreeConverter
path : /jmeterTestPlan/hashTree/hashTree/hashTree[8]/kg.apc.jmeter.samplers.DummySampler
line number : 16279
------------------------------- : kg.apc.jmeter.samplers.DummySampler : kg.apc.jmeter.samplers.DummySampler
---- Debugging information ----
message : kg.apc.jmeter.samplers.DummySampler
cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException
cause-message : kg.apc.jmeter.samplers.DummySampler
class : org.apache.jorphan.collections.ListedHashTree
required-type : org.apache.jorphan.collections.ListedHashTree
converter-type : org.apache.jmeter.save.converters.HashTreeConverter
path : /jmeterTestPlan/hashTree/hashTree/hashTree[8]/kg.apc.jmeter.samplers.DummySampler …