After the project is deployed in Tomcat, the access fails, the reason for the error 404 and the solution

MyEclipse errors in the report:

org.apache.catalina.LifecycleException:Failed to start component [Standardengine[catalina]. Standardhost[localhost]. STANDARDCONTEXT[/SYNUATPZ]] at Org.apache.catalina.util.LifecycleBase.start (lifecyclebase.java:154) at Org.apache.catalina.core.StandardContext.reload (standardcontext.java:3988) at Org.apache.catalina.startup.HostConfig.reload (hostconfig.java:1459) at Org.apache.catalina.startup.HostConfig.checkResources (hostconfig.java:1442) at Org.apache.catalina.startup.HostConfig.check (hostconfig.java:1626) at Org.apache.catalina.startup.HostConfig.lifecycleEvent (hostconfig.java:328) at Org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent (lifecyclesupport.java:117) at Org.apache.catalina.util.LifecycleBase.fireLifecycleEvent (lifecyclebase.java:90) at Org.apache.catalina.core.ContainerBase.backgroundProcess (containerbase.java:1374) at Org.apache.catalina.core.containerbase$containerbackgroundprocessor.processchildren (ContainerBase.java:1530) at Org.apache.catalina.coRe. Containerbase$containerbackgroundprocessor.processchildren (containerbase.java:1540) at Org.apache.catalina.core.containerbase$containerbackgroundprocessor.run (containerbase.java:1519) at Java.lang.Thread.run (thread.java:619) caused By:java.lang.IllegalArgumentException:Invalid <url-pattern> Collegedata in servlet mapping at org.apache.catalina.core.StandardContext.addServletMapping (Standardcontext.java : 3279) at org.apache.catalina.core.StandardContext.addServletMapping (standardcontext.java:3254) at Org.apache.catalina.deploy.WebXml.configureContext (webxml.java:1361) at Org.apache.catalina.startup.ContextConfig.webConfig (contextconfig.java:1341) at Org.apache.catalina.startup.ContextConfig.configureStart (contextconfig.java:873) at Org.apache.catalina.startup.ContextConfig.lifecycleEvent (contextconfig.java:371) at Org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent (lifecyclesupport.java:117) at Org.apache.catalina.util.LifecycleBase.fireLifecycleEvent (lifecyCLEBASE.JAVA:90) at Org.apache.catalina.core.StandardContext.startInternal (standardcontext.java:5355) at Org.apache.catalina.util.LifecycleBase.start (lifecyclebase.java:150) ... More

The reason for this error occurs:

The main is your own project servlet configures the path in the Web.xml (wrong:<url-pattern>collegedata</url-pattern>. Correct: <url-pattern>/collegeData</url-pattern> is missing "/" caused. Simply correct the error.