部署项目的时候，重启tomcat，死活起不来，很郁闷，网上巴拉了半天，结合自己的情况，找到了原因；
错误日志信息：
2018-12-13 13:52:26,992 [main] INFO org.apache.catalina.core.AprLifecycleListener- The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2018-12-13 13:52:27,052 [main] WARN org.apache.tomcat.util.digester.Digester- [SetAllPropertiesRule]{Server/Service/Connector} Setting property 'maxSpareThreads' to '512' did not find a matching property.
2018-12-13 13:52:27,394 [main] INFO org.apache.coyote.http11.Http11NioProtocol- Initializing ProtocolHandler ["http-nio-2015"]
2018-12-13 13:52:27,685 [main] INFO org.apache.tomcat.util.net.NioSelectorPool- Using a shared selector for servlet write/read
2018-12-13 13:52:27,688 [main] INFO org.apache.coyote.http11.Http11Protocol- Initializing ProtocolHandler ["http-bio-9094"]
2018-12-13 13:52:27,695 [main] INFO org.apache.catalina.startup.Catalina- Initialization processed in 976 ms
2018-12-13 13:52:27,732 [main] INFO org.apache.catalina.core.StandardService- Starting service Catalina
2018-12-13 13:52:27,732 [main] INFO org.apache.catalina.core.StandardEngine- Starting Servlet Engine: ONIP SOABean OpenAS V300R002C50SPC100
2018-12-13 13:52:27,796 [localhost-startStop-1] ERROR org.apache.catalina.core.StandardContext- Error starting static Resources
java.lang.IllegalArgumentException: Document base /home/duiba/apache-tomcat/webapps/../webapps/manager does not exist or is not a readable directory
at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:138)
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:4912)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5092)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1517)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1508)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
2018-12-13 13:52:27,800 [localhost-startStop-1] ERROR org.apache.catalina.core.StandardContext- Error in resourceStart()
2018-12-13 13:52:27,822 [localhost-startStop-1] ERROR org.apache.catalina.core.StandardContext- Error getConfigured
2018-12-13 13:52:27,823 [localhost-startStop-1] ERROR org.apache.catalina.core.StandardContext- Context [/manager] startup failed due to previous errors
2018-12-13 13:52:27,923 [localhost-startStop-1] INFO org.apache.catalina.loader.WebappClassLoader- validateJarFile(/home/duiba/apache-tomcat/webapps/duiba/WEB-INF/lib/servlet-api-1.0.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
分析原因：原来是因为我自己的原因，为了把原来的东西个删除干净，我把tomcat自带的manager目录也给删除了，这就尴尬了，启动的时候就一直有这个错误的日志信息在打印（事实上，这个错误并不影响程序的运行），但是日志一直有Error还是不好的，我就把其他模块的manager给复制了一份，并传到了改服务器上，然后重新启动服务，启动成功了！感觉下次要小心了，不能乱删东西啊！