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我最近管理（并非不费力）在Debian 8.1远程服务器上安装tomcat 8。我的目标是在该tomcat服务器上运行名为geoserver 的webapp。因此，在我的/var/lib/tomcat8/webapps目录中，我创建了一个名为geoserver/的新目录，并在该目录中上载了名为geoserver.war的.war文件。在tomcat 8上部署geoserver
然后我/var/lib/tomcat8/conf去（这实际上是一个重定向我/etc/tomcat8符号链接和编辑tomcat-users.xml文件时，<tomcat-users></tomcat-users>标签之间添加以下：
<role rolename="admin-gui"/>
<role rolename="manager-gui"/>
<user username="admin" password="*****" roles="admin-gui, manager-gui"/>
将授予我访问Tomcat的webapps经理和主持人经理，在经理中，我部署了我的geoserver.war文件，给出了上下文路径和其他必需的URL，之后我可以在我的应用列表中看到/geoserver已成功运行。但是当我试图实际连接到geoserver页面（在MY_SERVER_IP：8080/geoserver）时，为了解决这个问题，我得到了一个404错误，说请求的资源（/geoserver）不可用。为了记录，默认情况下提供的其他web应用程序（例如/ examples）非常适用。
我无法在网上找到我的问题的答案，这就是为什么我来这里问有没有人知道如何解决我的问题。我希望我的问题对于stackoverflow不太偏离主题，如果它只是让我知道，我会将它发布到另一个网站上。预先感谢，并有一个良好的周末！
编辑：当我尝试在我的tomcat webapps管理器中启动geoserver时，下面是在catalina.out文件中写入的内容。
avr. 24, 2017 5:32:55 AM org.apache.catalina.core.ApplicationContext log
INFOS: No Spring WebApplicationInitializer types detected on classpath
以下部分由于某些原因重复5次。
avr. 24, 2017 5:32:55 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Error configuring application listener of class marktest.Config org.geoserver.GeoserverInitStartupListener
java.lang.UnsupportedClassVersionError: org/geoserver/GeoserverInitStartupListener : Unsupported major.minor version 52.0 (unable to load class org.geoserver.GeoserverInitStartupListener)
at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2476)
at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:853)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1263)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1146)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:520)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:501)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:120)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4753)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5256)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1265)
at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:673)
at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:221)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:213)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:618)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1081)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1570)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1527)
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:745)
，并在结尾：
avr. 24, 2017 5:32:55 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Skipped installing application listeners due to previous error(s)
avr. 24, 2017 5:32:55 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error listenerStart
avr. 24, 2017 5:32:55 AM org.apache.catalina.core.StandardContext startInternal
SEVERE: Context [/geoserver] startup failed due to previous errors
某些部分是用法语写的，我希望我的翻译是不够准确的。
任何人都可以帮助我解决我的问题？ – ntyss