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java.lang.ClassCastException: class org.apache.solr.handler.clustering.ClusteringComponent at java.lang.Class.asSubclass(Class.java:3165) at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:474) at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:421) at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:543)