启动tomcat时报错如下：
严重: Servlet [jsp] in web application [/HDFS-NetDisk] threw load() exception
java.lang.ClassNotFoundException: org.mortbay.log.Log
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1891)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1734)
at com.sun.org.apache.commons.logging.JettyLog.(JettyLog.java:36)
at com.sun.org.apache.commons.logging.LogFactory.getLog(LogFactory.java:35)
at org.apache.jasper.servlet.JspServlet.(JspServlet.java:116)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:114)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1146)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1085)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5349)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5641)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
六月 20, 2019 8:50:31 下午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-bio-8080"]
六月 20, 2019 8:50:31 下午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-bio-8009"]
六月 20, 2019 8:50:31 下午 org.apache.catalina.startup.Catalina start
信息: Server startup in 14071 ms
请求大佬们帮忙看看，急！！！
