我有点卡在这里。我使用 Solr4.4 时没有遇到太多问题。我想启用 DIH，因此我首先在 solrconfig.xml 中添加了以下几行：
<lib dir="../contrib/dataimporthandler/lib" regex=".*\.jar" />
<lib dir="../dist/" regex="apache-solr-dataimporthandler-.*\.jar" />
重新启动后一切都正常了。然后我在配置中添加了以下几行，这破坏了 Solr：
<requestHandler name="/dataimport" class="org.apache.solr.handler.dataimport.DataImportHandler">
<lst name="defaults">
<str name="config">/opt/solr/collection1/conf/data-config.xml</str>
</lst>
</requestHandler>
这是它给我的错误：
HTTP ERROR 500
Problem accessing /solr/. Reason:
{msg=SolrCore 'collection1' is not available due to init failure: RequestHandler init failure,trace=org.apache.solr.common.SolrException: SolrCore 'collection1' is not available due to init failure: RequestHandler init failure
at org.apache.solr.core.CoreContainer.getCore(CoreContainer.java:860)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:251)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:158)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1486)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:540)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1094)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:432)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1028)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:258)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:317)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:445)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:267)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:224)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.run(AbstractConnection.java:358)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:601)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:532)
at java.lang.Thread.run(Thread.java:724)
Caused by: org.apache.solr.common.SolrException: RequestHandler init failure
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:835)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:629)
at org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:622)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:657)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:364)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:356)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
... 1 more
Caused by: org.apache.solr.common.SolrException: RequestHandler init failure
at org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:167)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:772)
... 13 more
Caused by: org.apache.solr.common.SolrException: Error loading class 'org.apache.solr.handler.dataimport.DataImportHandler'
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:449)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:381)
at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:530)
at org.apache.solr.core.SolrCore.createRequestHandler(SolrCore.java:603)
at org.apache.solr.core.RequestHandlers.initHandlersFromConfig(RequestHandlers.java:153)
... 14 more
Caused by: java.lang.ClassNotFoundException: org.apache.solr.handler.dataimport.DataImportHandler
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:787)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:433)
... 18 more
,code=500}
有人能告诉我我做错了什么吗？只要我删除这些行，一切就会恢复正常。
答案1
看起来您可能没有将 data-config.xml 放在它期望查找的位置。（/opt/solr/collection1/conf/data-config.xml）
请参阅http://wiki.apache.org/solr/DIHQuickStart
如果您不再使用 collection1 作为核心（example-DIH 则不会），系统重启可能会有所帮助 - 它对我遇到的类似问题有用。我想有一些易失性存储设置。如果这不可行，我建议追踪相关的属性文件并检查或删除它们...