如何解决java RuntimeException：在类路径中找不到资源'solrconfig.xml'？

Question

我在设置Solr作为CentOS中的Tomcat服务时遇到了问题。我正在使用solr 3.3.0，它应该与从cPanel安装的Tomcat 5.5一起工作。我得到的错误是：

找不到在类路径或“/home/sampleuser/public_html/apache-solr/example/solr/./conf/”，CWD资源“solrconfig.xml中” = /usr/local/jakarta/apache-tomcat-5.5.33/bin

我看到其他人有类似的问题。我搜索并尝试应用所有的方法。然而到目前为止，我没有任何工作。

我做了以下内容：

1. 复制solr.war到tomcat/webapps
2. 重启动Tomcat服务

3. 编辑/usr/local/jakarta/tomcat/webapps/solr/WEB-INF/web.xml为：

   <env-entry> 
   <env-entry-name>solr/home</env-entry-name> 
   <env-entry-value>/home/sampleuser/public_html/apache-solr/example/solr</env-entry-value> 
   <env-entry-type>java.lang.String</env-entry-type> 
   </env-entry> 
   

4. 在/usr/local/jakarta/tomcat/conf/Catalina/localhost创建solr.xml为：

   <?xml version="1.0" encoding="utf-8"?> 
   <Context docBase="/usr/local/jakarta/tomcat/webapps/solr.war" debug="0" crossContext="true"> 
       <Environment name="solr/home" type="java.lang.String"  
        value="/home/sampleuser/public_html/apache-solr/example"override="true"/> 
   </Context> 
   

5. 编辑Tomcat启动脚本在etc/init.d（不知道如果我不得不这样做的话）有：

export JAVA_OPTS="$JAVA_OPTS -Dsolr.solr.home=/home/sampleuser/public_html/apache-solr/example/solr"

下面是从catalina.err完整的错误日志：

Oct 9, 2011 7:35:06 PM org.apache.catalina.core.StandardService stop 
INFO: Stopping service Catalina 
Oct 9, 2011 7:35:06 PM org.apache.catalina.core.ApplicationContext log 
INFO: SessionListener: contextDestroyed() 
Oct 9, 2011 7:35:06 PM org.apache.catalina.core.ApplicationContext log 
INFO: ContextListener: contextDestroyed() 
Oct 9, 2011 7:35:06 PM org.apache.catalina.core.ApplicationContext log 
INFO: SessionListener: contextDestroyed() 
Oct 9, 2011 7:35:06 PM org.apache.catalina.core.ApplicationContext log 
INFO: ContextListener: contextDestroyed() 
Oct 9, 2011 7:35:06 PM org.apache.coyote.http11.Http11BaseProtocol destroy 
INFO: Stopping Coyote HTTP/1.1 on http-8080 
Oct 9, 2011 7:35:21 PM org.apache.catalina.core.AprLifecycleListener init 
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/local/jdk/jre/lib/amd64/server:/usr/local/jdk/jre/lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib 
Oct 9, 2011 7:35:23 PM org.apache.coyote.http11.Http11BaseProtocol init 
INFO: Initializing Coyote HTTP/1.1 on http-8080 
Oct 9, 2011 7:35:23 PM org.apache.catalina.startup.Catalina load 
INFO: Initialization processed in 2875 ms 
Oct 9, 2011 7:35:23 PM org.apache.catalina.core.StandardService start 
INFO: Starting service Catalina 
Oct 9, 2011 7:35:23 PM org.apache.catalina.core.StandardEngine start 
INFO: Starting Servlet Engine: Apache Tomcat/5.5.33 
Oct 9, 2011 7:35:23 PM org.apache.catalina.core.StandardHost start 
INFO: XML validation disabled 
Oct 9, 2011 7:35:24 PM org.apache.catalina.startup.HostConfig deployDescriptor 
WARNING: A docBase /usr/local/jakarta/tomcat/webapps/solr.war inside the host appBase has been specified, and will be ignored 
Oct 9, 2011 7:35:25 PM org.apache.solr.core.SolrResourceLoader locateSolrHome 
INFO: Using JNDI solr.home: /home/sampleuser/public_html/apache-solr/example/solr 
Oct 9, 2011 7:35:25 PM org.apache.solr.core.SolrResourceLoader <init> 
INFO: Solr home set to '/home/sampleuser/public_html/apache-solr/example/solr/' 
Oct 9, 2011 7:35:25 PM org.apache.solr.servlet.SolrDispatchFilter init 
INFO: SolrDispatchFilter.init() 
Oct 9, 2011 7:35:25 PM org.apache.solr.core.SolrResourceLoader locateSolrHome 
INFO: Using JNDI solr.home: /home/sampleuser/public_html/apache-solr/example/solr 
Oct 9, 2011 7:35:25 PM org.apache.solr.core.CoreContainer$Initializer initialize 
INFO: looking for solr.xml: /home/sampleuser/public_html/apache-solr/example/solr/solr.xml 
Oct 9, 2011 7:35:25 PM org.apache.solr.core.SolrResourceLoader locateSolrHome 
INFO: Using JNDI solr.home: /home/sampleuser/public_html/apache-solr/example/solr 
Oct 9, 2011 7:35:25 PM org.apache.solr.core.CoreContainer <init> 
INFO: New CoreContainer: solrHome=/home/sampleuser/public_html/apache-solr/example/solr/ instance=1537767228 
Oct 9, 2011 7:35:25 PM org.apache.solr.core.SolrResourceLoader <init> 
INFO: Solr home set to '/home/sampleuser/public_html/apache-solr/example/solr/' 
Oct 9, 2011 7:35:26 PM org.apache.solr.core.SolrResourceLoader <init> 
INFO: Solr home set to '/home/sampleuser/public_html/apache-solr/example/solr/./' 
Oct 9, 2011 7:35:26 PM org.apache.solr.common.SolrException log 
SEVERE: java.lang.RuntimeException: Can't find resource 'solrconfig.xml' in classpath or '/home/sampleuser/public_html/apache-solr/example/solr/./conf/', cwd=/usr/local/jakarta/apache-tomcat-5.5.33/bin 
     at org.apache.solr.core.SolrResourceLoader.openResource(SolrResourceLoader.java:268) 
     at org.apache.solr.core.SolrResourceLoader.openConfig(SolrResourceLoader.java:234) 
     at org.apache.solr.core.Config.<init>(Config.java:141) 
     at org.apache.solr.core.SolrConfig.<init>(SolrConfig.java:131) 
     at org.apache.solr.core.CoreContainer.create(CoreContainer.java:435) 
     at org.apache.solr.core.CoreContainer.load(CoreContainer.java:316) 
     at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:133) 
     at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:94) 
     at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:221) 
     at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:302) 
     at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:78) 
     at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3666) 
     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4258) 
     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760) 
     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740) 
     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544) 
     at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:634) 
     at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:561) 
     at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:496) 
     at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1203) 
     at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:319) 
     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120) 
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022) 
     at org.apache.catalina.core.StandardHost.start(StandardHost.java:736) 
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014) 
     at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) 
     at org.apache.catalina.core.StandardService.start(StandardService.java:448) 
     at org.apache.catalina.core.StandardServer.start(StandardServer.java:700) 
     at org.apache.catalina.startup.Catalina.start(Catalina.java:552) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
     at java.lang.reflect.Method.invoke(Method.java:597) 
     at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
     at java.lang.reflect.Method.invoke(Method.java:597) 
     at org.apache.commons.daemon.support.DaemonLoader.start(DaemonLoader.java:219) 

Oct 9, 2011 7:35:26 PM org.apache.solr.servlet.SolrDispatchFilter init 
INFO: user.dir=/usr/local/jakarta/apache-tomcat-5.5.33/bin 
Oct 9, 2011 7:35:26 PM org.apache.solr.servlet.SolrDispatchFilter init 
INFO: SolrDispatchFilter.init() done 
Oct 9, 2011 7:35:26 PM org.apache.solr.servlet.SolrServlet init 
INFO: SolrServlet.init() 
Oct 9, 2011 7:35:26 PM org.apache.solr.core.SolrResourceLoader locateSolrHome 
INFO: Using JNDI solr.home: /home/sampleuser/public_html/apache-solr/example/solr 
Oct 9, 2011 7:35:26 PM org.apache.solr.servlet.SolrServlet init 
INFO: SolrServlet.init() done 
Oct 9, 2011 7:35:26 PM org.apache.solr.core.SolrResourceLoader locateSolrHome 
INFO: Using JNDI solr.home: /home/sampleuser/public_html/apache-solr/example/solr 
Oct 9, 2011 7:35:26 PM org.apache.solr.servlet.SolrUpdateServlet init 
INFO: SolrUpdateServlet.init() done 

当我通过shell复制缺少的路径时，我能够导航就好。看起来像Tomcat无法找到solrconfig.xml。

Answer 1

第一关：你不需要，除非你明确地定制solr.war至＃3 和＃4 和 5＃3并不推荐使用。 ＃4和＃5是两种不同的方式来做同样的事情 - 使用哪一个最方便你（JNDI vs系统属性）

第二：请注意，虽然＃3和＃5是一致的，在＃4你实际上指定了一个不同的Solr主目录（你真正想要的父目录）

第三：我认为问题的关键是文件权限。

由于SOLR-3264导致日志记录有点混乱，导致每个核心的“instanceDirs”被错误地称为“Solr Home”，但似乎发生的是它无法找到（或读取）您的“ /home/sampleuser/public_html/apache-solr/example/solr/solr.xml“，因此它将进入传统的”单核“模式，它假设您想将Solr主目录用作实例目录（单个）Solr核心 - 所以它然后查找“/home/sampleuser/public_html/apache-solr/example/solr/solrconf.xml”，如果它找不到（或读取）它放弃的文件。

因此，根据您的主要担心是否实际上有一个solr.xml（指向备用instanceDirs），它没有找到，或者如果实际上有一个solrconfig.xml文件，请检查文件的权限这些文件（及其目录），并确保它们可以被tomcat服务器的有效用户读取。

（FWIW：Solr的3.6以及更高版本将有better logging when solr.xml is not found and legacy mode is used，我已经开了SOLR-3266追求记录的更好的方法/在未来的不可读文件示数）[HTTP状态500