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如何修复java运行时异常：在类路径中找不到资源'solrconfig.xml'？



我在CentOS中将Solr设置为Tomcat服务时遇到问题。我使用的是solr 3.3.0，应该与从cPanel安装的Tomcat 5.5一起工作。我得到的错误是:

在类路径或/home/sampleuser/public_html/apache-solr/example/solr/中找不到资源'solrconfig.xml'。/conf/'， cwd=/usr/local/jakarta/apache-tomcat-5.5.33/bin

我看到其他人也有类似的问题。我在谷歌上搜索并尝试应用所有的方法。然而，到目前为止，没有什么对我有效。

我做了以下操作:

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

  3. Edited /usr/local/jakarta/tomcat/webapps/solr/WEB-INF/web.xml as: 

    <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. 创建solr.xml在/usr/local/jakarta/tomcat/conf/Catalina/localhost作为:

    <?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. 在etc/init.d编辑tomcat启动脚本(不确定我是否必须这样做):

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

下面是来自catalina的完整错误日志。错:

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复制丢失的路径时，我能够很好地导航。好像Tomcat找不到solrconfig.xml .

首先:你不需要# 3 和 # 4 和 5。不建议使用第3条，除非您正在显式地定制solr.war。#4和#5是做同一件事的两种不同方法——使用最方便的一种(JNDI vs系统属性)

第二:请注意，虽然#3和#5是一致的，但在#4中，您实际上指定了不同的Solr主目录(您真正想要的父目录)

第三:我认为你的问题的关键是文件权限。

日志有点混乱由于Solr - 3264导致"instanceDirs"为每个核心是错误地提到"Solr回家"但似乎发生了什么是,你找不到(或读)"/Home/sampleuser/public_html/apache Solr/例子/Solr/solr.xml"这是进入遗留"单核"模式,它假设您希望使用Solr家里作为instanceDir dir(单一)Solr核心,然后查找"/home/sampleuser/public_html/apache-solr/example/solr/solrconf.xml"，如果无法找到(或读取)该文件，则放弃。

因此，根据您主要关心的是您实际上有一个solr.xml(指向备用实例dirs)，它没有找到，或者如果您实际上有一个solrconfig.xml文件，它正在查找，检查这些文件(及其目录)的文件权限，并确保它们是可读的有效用户您的tomcat服务器。

(fww: Solr 3.6及更高版本在没有找到Solr .xml并且使用遗留模式时将有更好的日志记录，并且我已经打开Solr -3266以便在将来对不可读文件进行更好的日志记录/错误记录)

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