我正在尝试用eclipse和tomcat调试solr4.6源代码。我得到的错误信息:HTTP状态500 - {msg=SolrCore 'collection1'不可用，因为init失败:Plugin init failure for [schema.xml] fieldType "text_ws": Plugin init failure for [schema.xml] analyzer/tokenizer
我试着调试它，发现SolrResourceLoader将类名构建为Name = base + '。' + subpackage + newName;在太阳的情况下。WhitespaceTokenizerFactory，基础是org.apache.solr，而子包名称是"，newName是WhitespaceTokenizerFactory。
所以fn Class.forName(name,true,classLoader)的name值是org.apache.solr.WhitespaceTokenizerFactory
但是WhitespaceTokenizerFactory在solr source中的包是:org.apache.lucene.analysis.core;
堆栈跟踪:
5200 T22 oasc.SolrException.log ERROR null:org.apache.solr.common.SolrException: SolrCore 'collection1' is not available due to init failure: Plugin init failure for [schema.xml] fieldType "text_ws": Plugin init failure for [schema.xml] analyzer/tokenizer: Error loading class 'solr.WhitespaceTokenizerFactory'. Schema file is /usr/share/solr2/example/solr/collection1/schema.xml
at org.apache.solr.core.CoreContainer.getCore(CoreContainer.java:823)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:301)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:201)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:744)
Caused by: org.apache.solr.common.SolrException: Plugin init failure for [schema.xml] fieldType "text_ws": Plugin init failure for [schema.xml] analyzer/tokenizer: Error loading class 'solr.WhitespaceTokenizerFactory'. Schema file is /usr/share/solr2/example/solr/collection1/schema.xml
at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:608)
at org.apache.solr.schema.IndexSchema.<init>(IndexSchema.java:166)
at org.apache.solr.schema.IndexSchemaFactory.create(IndexSchemaFactory.java:55)
at org.apache.solr.schema.IndexSchemaFactory.buildIndexSchema(IndexSchemaFactory.java:69)
at org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:559)
at org.apache.solr.core.CoreContainer.create(CoreContainer.java:597)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:251)
at org.apache.solr.core.CoreContainer$1.call(CoreContainer.java:1)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
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)
... 1 more
Caused by: org.apache.solr.common.SolrException: Plugin init failure for [schema.xml] fieldType "text_ws": Plugin init failure for [schema.xml] analyzer/tokenizer: Error loading class 'solr.WhitespaceTokenizerFactory'
at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:177)
at org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:468)
... 13 more
Caused by: org.apache.solr.common.SolrException: Plugin init failure for [schema.xml] analyzer/tokenizer: Error loading class 'solr.WhitespaceTokenizerFactory'
at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:177)
at org.apache.solr.schema.FieldTypePluginLoader.readAnalyzer(FieldTypePluginLoader.java:362)
at org.apache.solr.schema.FieldTypePluginLoader.create(FieldTypePluginLoader.java:95)
at org.apache.solr.schema.FieldTypePluginLoader.create(FieldTypePluginLoader.java:1)
at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:151)
... 14 more
Caused by: org.apache.solr.common.SolrException: Error loading class 'solr.WhitespaceTokenizerFactory'
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:470)
at org.apache.solr.core.SolrResourceLoader.newInstance(SolrResourceLoader.java:573)
at org.apache.solr.schema.FieldTypePluginLoader$2.create(FieldTypePluginLoader.java:342)
at org.apache.solr.schema.FieldTypePluginLoader$2.create(FieldTypePluginLoader.java:1)
at org.apache.solr.util.plugin.AbstractPluginLoader.load(AbstractPluginLoader.java:151)
... 18 more
Caused by: java.lang.ClassNotFoundException: solr.WhitespaceTokenizerFactory
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:789)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:270)
at org.apache.solr.core.SolrResourceLoader.findClass(SolrResourceLoader.java:454)
... 22 more
在使用eclipse和tomcat设置solr源代码后遇到了类似的问题。我将eclipse编译输出目录指定为webcontent/WEB-INF/classes。要允许tomcat使用相同的webcontent目录，而不是tomcat发布到wtp文件夹，请在tomcat的"server options"中启用"serve modules without publishing"。这将帮助classloader在正确的位置定位solr"services"。
我也遇到了同样的问题。Ajay的回答对我很有用。我遵循的步骤是:在"服务器"视图中双击"Tomcat at localhost"(或任何名称)。在服务器选项中，勾选"不发布而提供模块"的复选框。
参考:没有在Eclipse WTP和Tomcat中发布的服务模块的技术细节?