jmeter运行mqtt协议报错如下，插件加载mqtt-xmeter-2.0.2-jar-with-dependencies.jar

[willisfeng]

--- Debugging information ----

cause-exception : com.thoughtworks.xstream.converters.ConversionException

cause-message :

first-jmeter-class : org.apache.jmeter.save.converters.HashTreeConverter.unmarshal(HashTreeConverter.java:67)

class : org.apache.jmeter.save.ScriptWrapper

required-type : org.apache.jorphan.collections.ListedHashTree

converter-type : org.apache.jmeter.save.ScriptWrapperConverter

path : /jmeterTestPlan/hashTree/hashTree/hashTree/net.xmeter.samplers.ConnectSampler

line number : 29

version : 4.0 r1823414

---

at org.apache.jmeter.save.ScriptWrapperConverter.createConversionException(ScriptWrapperConverter.java:102)

at org.apache.jmeter.save.ScriptWrapperConverter.unmarshal(ScriptWrapperConverter.java:96)

at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)

at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:70)

at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)

at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)

at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)

at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)

at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1486)

at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1466)

at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1337)

at org.apache.jmeter.save.SaveService.readTree(SaveService.java:442)

... 142 common frames omitted

Caused by: com.thoughtworks.xstream.converters.ConversionException:

---- Debugging information ----

cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException

cause-message : net.xmeter.samplers.ConnectSampler

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/net.xmeter.samplers.ConnectSampler