Solr ClusteringComponent Carrot2：ClassNotFoundException(Solr ClusteringComponent Carrot2 : ClassNotFoundException)

 当我尝试使用群集组件运行Solr时出现以下错误。 
 
java.lang.NoClassDefFoundError: org/carrot2/core/ControllerFactory
    at org.apache.solr.handler.clustering.carrot2.CarrotClusteringEngine.<init>(CarrotClusteringEngine.java:101)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at java.lang.Class.newInstance0(Class.java:355)
 
 我已经使用了包含apache-solr-clustering.3.2.0.jar 
 
<lib dir="/usr/local/jetty/solr/lib/" regex="apache-solr-clustering-.*\.jar" />
 
 但看起来我错过了一些carrot2 jar文件。 我找不到任何文件来说明我还缺少什么或者我做错了什么。 
 
 请帮忙 

I get the following error when I try to run Solr with the Clustering Component.
 
java.lang.NoClassDefFoundError: org/carrot2/core/ControllerFactory
    at org.apache.solr.handler.clustering.carrot2.CarrotClusteringEngine.<init>(CarrotClusteringEngine.java:101)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at java.lang.Class.newInstance0(Class.java:355)
 
I have included the apache-solr-clustering.3.2.0.jar using the 
 
<lib dir="/usr/local/jetty/solr/lib/" regex="apache-solr-clustering-.*\.jar" />
 
But it looks like I am missing some carrot2 jar files. I cannot find any documentation to indicate what else I am missing or what I am doing wrong.
 
Please help

原文：https://stackoverflow.com/questions/6938354