Solr 4.3.0 配置Data import handler时出错

启动solr的时候，居然出现了如下的错误：

org.apache.solr.common.SolrException: RequestHandler init failure
        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:794)
        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:607)
        at org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:1003)
        at org.apache.solr.core.CoreContainer.create(CoreContainer.java:1033)
        at org.apache.solr.core.CoreContainer$3.call(CoreContainer.java:629)
        at org.apache.solr.core.CoreContainer$3.call(CoreContainer.java:624)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.solr.common.SolrException: RequestHandler init failure
        at org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:168)
        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:731)
        ... 13 more
Caused by: org.apache.solr.common.SolrException: Error loading class 'org.apache.solr.handler.dataimport.DataImportHandle
        at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:438)
        at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:507)
        at org.apache.solr.core.SolrCore.createRequestHandler(SolrCore.java:581)
        at org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:154)
        ... 14 more
Caused by: java.lang.ClassNotFoundException: org.apache.solr.handler.dataimport.DataImportHandler
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.net.FactoryURLClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:422)
        ... 17 more
2013-3-5 12:54:31 org.apache.solr.common.SolrException log
严重: null:org.apache.solr.common.SolrException: Unable to create core: core0
        at org.apache.solr.core.CoreContainer.recordAndThrow(CoreContainer.java:1654)
        at org.apache.solr.core.CoreContainer.create(CoreContainer.java:1039)
        at org.apache.solr.core.CoreContainer$3.call(CoreContainer.java:629)
        at org.apache.solr.core.CoreContainer$3.call(CoreContainer.java:624)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.solr.common.SolrException: RequestHandler init failure
        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:794)
        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:607)
        at org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:1003)
        at org.apache.solr.core.CoreContainer.create(CoreContainer.java:1033)
        ... 10 more
Caused by: org.apache.solr.common.SolrException: RequestHandler init failure
        at org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:168)
        at org.apache.solr.core.SolrCore.<init>(SolrCore.java:731)
        ... 13 more
Caused by: org.apache.solr.common.SolrException: Error loading class 'org.apache.solr.handler.dataimport.DataImportHandle
        at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:438)
        at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:507)
        at org.apache.solr.core.SolrCore.createRequestHandler(SolrCore.java:581)
        at org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:154)
        ... 14 more
Caused by: java.lang.ClassNotFoundException: org.apache.solr.handler.dataimport.DataImportHandler
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.net.FactoryURLClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:422)
        ... 17 more

原因是 solr-dataimporthandler-4.3.0.jar 没找到，可能是配置位置有问题，直接将 solr-dataimporthandler-4.3.0.jar 复制到 solr\WEB-INF\lib 即可