好的，我只是通过他的托管服务提供商为我的客户设置专用服务器。他们在那里安装了plesk（版本9.2.1），这个专用服务器的一个注意事项是，如果我在控制面板外面做任何事情（即使用SSH）进行任何任务，他们不保证支持该软件组件。这很好，因为我宁愿使用控制面板来完成它，因为我所要做的就是上传一个war文件来安装servlet。
这是问题，但在安装最新版本的solr（1.3.0）后，我在plesk中收到一个警告图标，它给了我一个模糊的错误，例如“应用程序的实际状态与从中检索到的状态不对应数据库。“
这是日志条目：
Aug 17, 2009 11:16:15 PM org.apache.solr.servlet.SolrDispatchFilter init
INFO: SolrDispatchFilter.init()
Aug 17, 2009 11:16:15 PM org.apache.solr.core.SolrResourceLoader
locateInstanceDir
INFO: Using JNDI solr.home: /usr/share/solr
Aug 17, 2009 11:16:15 PM
org.apache.solr.core.CoreContainer$Initializer initialize
INFO: looking for solr.xml: /usr/share/solr/solr.xml
Aug 17, 2009 11:16:15 PM org.apache.solr.core.SolrResourceLoader <init>
INFO: Solr home set to '/usr/share/solr/'
Aug 17, 2009 11:16:15 PM org.apache.solr.core.SolrResourceLoader
createClassLoader
INFO: Reusing parent classloader
Aug 17, 2009 11:16:15 PM org.apache.solr.servlet.SolrDispatchFilter init
SEVERE: Could not start SOLR. Check solr/home property
java.lang.ExceptionInInitializerError
at org.apache.solr.core.CoreContainer$Initializer.initialize(CoreContainer.java:117)
at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:69)
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:3635)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4222)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
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:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: java.lang.RuntimeException: XPathFactory#newInstance()
failed to create an XPathFactory for the default object model:
http://java.sun.com/jaxp/xpath/dom with the
XPathFactoryConfigurationException:
javax.xml.xpath.XPathFactoryConfigurationException: No XPathFctory
implementation found for the object model:
http://java.sun.com/jaxp/xpath/dom
at javax.xml.xpath.XPathFactory.newInstance(Unknown Source)
at org.apache.solr.core.Config.<clinit>(Config.java:41)
... 20 more
Aug 17, 2009 11:16:15 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter SolrRequestFilter
java.lang.NoClassDefFoundError: Could not initialize class
org.apache.solr.core.SolrConfig
at org.apache.solr.servlet.SolrDispatchFilter.init(SolrDispatchFilter.java:76)
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:3635)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4222)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
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:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Aug 17, 2009 11:16:15 PM org.apache.catalina.core.StandardContext start
SEVERE: Error filterStart
Aug 17, 2009 11:16:15 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/solr] startup failed due to previous errors
solr / home目录存在，为什么solr会抱怨这个？
答案 0 :(得分：5)
好的，这是问题所在！事实证明，tomcat的某些发行版没有对xalan的引用，这是XPathFactory的异常来源。此错误可能会产生误导，因为它将错误记录为solr / home属性NOT BEING SET的问题。事实是，它已被设定。启动solr时出现问题的9次中有9次是由于没有设置solr / home目录。
这是我为自己修复的方法：我进入/usr/share/tomcat5/shared/lib目录并创建了一个位于/usr/share/java目录中的xalan-j2.jar文件的符号链接。重新启动Tomcat和Solr立即启动！
其他一些提示：
编辑您正在上传的solr.war文件中的web.xml文件，进行更改然后重新调整。将目录设置为/usr/share/solr。这样，如果日志没有显示它使用该目录作为solr / home，那么就会出现问题。另外，确保solr / home看起来像这样：
/usr/share/solr/
/usr/share/solr/bin
/usr/share/solr/bin/rsyncd-stop
/usr/share/solr/bin/abo
/usr/share/solr/bin/scripts-util
/usr/share/solr/bin/snappuller-disable
/usr/share/solr/bin/backupcleaner
/usr/share/solr/bin/snapcleaner
/usr/share/solr/bin/rsyncd-disable
/usr/share/solr/bin/snapinstaller
/usr/share/solr/bin/commit
/usr/share/solr/bin/snappuller-enable
/usr/share/solr/bin/snappuller
/usr/share/solr/bin/backup
/usr/share/solr/bin/rsyncd-start
/usr/share/solr/bin/abc
/usr/share/solr/bin/rsyncd-enable
/usr/share/solr/bin/optimize
/usr/share/solr/bin/snapshooter
/usr/share/solr/bin/readercycle
/usr/share/solr/conf
/usr/share/solr/conf/schema.xml
/usr/share/solr/conf/solrconfig.xml
/usr/share/solr/conf/synonyms.txt
/usr/share/solr/conf/xslt
/usr/share/solr/conf/xslt/example_atom.xsl
/usr/share/solr/conf/xslt/luke.xsl
/usr/share/solr/conf/xslt/example_rss.xsl
/usr/share/solr/conf/xslt/example.xsl
/usr/share/solr/conf/elevate.xml
/usr/share/solr/conf/scripts.conf
/usr/share/solr/conf/protwords.txt
/usr/share/solr/conf/spellings.txt
/usr/share/solr/conf/admin-extra.html
/usr/share/solr/conf/stopwords.txt
/usr/share/solr/README.txt
用户：组权限为tomcat：tomcat。如果solr正常启动，将创建数据目录。
希望这可以节省很多时间。
答案 1 :(得分：-1)
我很确定'solr / home property'并不是指名为'solr / home'的目录，而是一个环境变量或包含目录路径的系统属性。
快速谷歌搜索出现this page，其中属性设置为java系统属性：“ - Dsolr.solr.home = / my / custom / solr / home / dir /".