我有一个solr 5.2.1实例，我想创建一个名为production的新核心。 我有几个问题已经解决了访问权限，但以下异常对我来说完全不清楚。感谢帮助。
org.apache.solr.common.SolrException: Error CREATEing SolrCore 'production': Unable to create core [production] Caused by: solr.JsonUpdateRequestHandler
at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:661)
at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestInternal(CoreAdminHandler.java:213)
at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:193)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
at org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:660)
at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:431)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:227)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:196)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:497)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.solr.common.SolrException: Unable to create core [production]
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:651)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:611)
at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:628)
... 27 more
Caused by: org.apache.solr.common.SolrException: Error loading class 'solr.JsonUpdateRequestHandler'
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:815)
at org.apache.solr.core.SolrCore.<init>(SolrCore.java:658)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:637)
... 29 more
Caused by: org.apache.solr.common.SolrException: Error loading class 'solr.JsonUpdateRequestHandler'
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:491)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:422)
at org.apache.solr.core.SolrCore.createInstance(SolrCore.java:566)
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.<init>(SolrCore.java:768)
... 31 more
Caused by: java.lang.ClassNotFoundException: solr.JsonUpdateRequestHandler
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:425)
at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:793)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:278)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:475)
答案 0 :(得分：12)
您似乎使用旧版solrconfig.xml。类JsonUpdateRequestHandler已在最新的Solr 4.x版本中弃用，已从Solr 5.x中删除。您应该使用UpdateRequestHandler代替它，并根据您的Solr版本更新solrconfig.xml。