org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/CollegeWebsite]] [duplicate]
You have a version conflict, please verify whether compiled version and JVM of Tomcat version are same.you can do it by examining tomcat startup .bat , looking for JAVA_HOME
This error happens because of your Jre version of Eclipse and Tomcat are mismatched ..either change eclipse one to tomcat one or ViceVersa..
Both should be same ..Java version mismatched ..Check it