I tried to access servlet via html in eclipse , then I got this errors :) HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: Error instantiating servlet class BeerSelect org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445) java.lang.Thread.run(Unknown Source) root cause java.lang.IllegalAccessException: Class org.apache.catalina.core.StandardWrapper can not access a member of class BeerSelect with modifiers "" sun.reflect.Reflection.ensureMemberAccess(Unknown Source) java.lang.Class.newInstance0(Unknown Source) java.lang.Class.newInstance(Unknown Source) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634) org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445) java.lang.Thread.run(Unknown Source)