org.apache.solr.common.SolrException: Error Instantiating requestHandler, org.apache.solr.handler.dataimport.DataImportHandler failed to instantiate org.apache.solr.request.SolrRequestHandler

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org.apache.solr.common.SolrException: Error Instantiating requestHandler, org.apache.solr.handler.dataimport.DataImportHandler failed to instantiate org.apache.solr.request.SolrRequestHandler
at java.lang.Class.asSubclass(Class.java:3208)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:475)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:422)
at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:567)
at org.apache.solr.core.PluginBag.createPlugin(PluginBag.java:122)
at org.apache.solr.core.PluginBag.init(PluginBag.java:217)
at org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:130)
at org.apache.solr.core.SolrCore.(SolrCore.java:773)
at org.apache.solr.core.SolrCore.(SolrCore.java:659)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:727)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:447)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:438)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

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