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java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet	at java.lang.ClassLoader.defineClass0(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:502)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)	at java.net.URLClassLoader.access$100(URLClassLoader.java:54)	at java.net.URLClassLoader$1.run(URLClassLoader.java:193)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:186)	at java.lang.ClassLoader.loadClass(ClassLoader.java:299)	at java.lang.ClassLoader.loadClass(ClassLoader.java:255)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)	at java.lang.ClassLoader.defineClass0(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:502)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)	at java.net.URLClassLoader.access$100(URLClassLoader.java:54)	at java.net.URLClassLoader$1.run(URLClassLoader.java:193)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:186)	at java.lang.ClassLoader.loadClass(ClassLoader.java:299)	at java.lang.ClassLoader.loadClass(ClassLoader.java:255)	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)	at java.lang.ClassLoader.defineClass0(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:502)	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)	at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)	at java.net.URLClassLoader.access$100(URLClassLoader.java:54)	at java.net.URLClassLoader$1.run(URLClassLoader.java:193)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:186)	at java.lang.ClassLoader.loadClass(ClassLoader.java:299)	at java.lang.ClassLoader.loadClass(ClassLoader.java:292)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)	at java.lang.ClassLoader.loadClass(ClassLoader.java:255)	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1355)	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1289)	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:885)	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:823)	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3420)	at org.apache.catalina.core.StandardContext.start(StandardContext.java:3608)	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:821)	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:579)	at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:307)	at org.apache.catalina.core.StandardHost.install(StandardHost.java:772)	at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:559)	at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:401)	at org.apache.catalina.startup.HostConfig.start(HostConfig.java:718)	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:358)	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:166)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1196)	at org.apache.catalina.core.StandardHost.start(StandardHost.java:738)	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)	at org.apache.catalina.core.StandardService.start(StandardService.java:497)	at org.apache.catalina.core.StandardServer.start(StandardServer.java:2190)	at org.apache.catalina.startup.Catalina.start(Catalina.java:512)	at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)	at org.apache.catalina.startup.Catalina.process(Catalina.java:180)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:324)	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)