Question

我正在尝试使用eclipse和tomcat调试solr4.6源代码。我收到错误消息： HTTP状态500 - 由于init失败，{msg = SolrCore'collection1'不可用：[schema.xml] fieldType“text_ws”的插件初始化失败：[schema.xml] analyzer / tokenizer的插件初始化失败

我尝试调试它，发现SolrResourceLoader将类名构建为 name = base +'。' + subpackage + newName; 在solr.WhitespaceTokenizerFactory的情况下，base是org.apache.solr，而subpackage名称是''，newName是WhitespaceTokenizerFactory。

因此fn Class.forName（name，true，classLoader）的name值是org.apache.solr.WhitespaceTokenizerFactory

然而，solr源中的WhitespaceTokenizerFactory包是：org.apache.lucene.analysis.core;

堆栈追踪：

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

Answer 1

在使用eclipse和tomcat设置solr源代码后面临类似的问题。我把eclipse编译输出目录指向为webcontent / WEB-INF / classes。允许tomcat使用相同的webcontent目录而不是tomcat发布到wtp文件夹，在tomcat的“服务器选项”中启用“不发布服务模块”。这将有助于类加载器在正确的位置定位solr“服务”。目前用于您的案例的类加载器无法找到相同的。

Answer 2

我遇到了同样的问题。 Ajay的回答对我有用。我遵循的步骤：双击＆tomcat at localhost＆＃39; （或任何名称）在服务器＆＃39;视图。在服务器选项中，勾选“不发布服务模块”复选框。＆＃39;

参考：Technical details of serve modules without publishing in Eclipse WTP and Tomcat?

调试solr 4.6源码。获取ClassNotFoundException：java.lang.ClassNotFoundException：solr.WhitespaceTokenizerFactory

2 个答案: