solr启动失败404的原因

我复制了官方文档下面的solr实例 放到 webapps目录下

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更改端口后启动，发现404

查看tomcat控制台的报出有如下

12-Jun-2017 11:03:13.606 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory D:\serversoftware\apache-tomcat-8.0.39-windows-x645-solr\apache-tomcat-8.0.39\webapps\ROOT has finished in 31 ms12-Jun-2017 11:03:13.606 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory D:\serversoftware\apache-tomcat-8.0.39-windows-x645-solr\apache-tomcat-8.0.39\webapps\solr12-Jun-2017 11:03:17.025 信息 [localhost-startStop-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.12-Jun-2017 11:03:17.078 严重 [localhost-startStop-1] org.apache.catalina.core.StandardContext.startInternal One or more Filters failed to start. Full details will be found in the appropriate container log file12-Jun-2017 11:03:17.081 严重 [localhost-startStop-1] org.apache.catalina.core.StandardContext.startInternal Context [/solr] startup failed due to previous errors12-Jun-2017 11:03:17.094 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory D:\serversoftware\apache-tomcat-8.0.39-windows-x645-solr\apache-tomcat-8.0.39\webapps\solr has finished in 3,488 ms

solr 项目没有加载成功，原来是 log4j 的 jar包不全。

需要将 以下ext下面的lib 放到 tomcat中的 solr项目的lib目录下

复制到这里即可