HTTP Status 503 - This application is not currently available

i have created a servlet with the directory structure as follow

C:\Program Files\apache-tomcat-6.0.32\webapps\myworld\WEB-INF\classes\HelloWorld.java

code:

xml file
C:\Program Files\apache-tomcat-6.0.32\webapps\myworld\WEB-INF\web.xml

mapping:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
-->

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
   version="2.5">

<servlet>
  <servlet-name>HelloWorld</servlet-name>
  <servlet-class>HelloWorld</servlet-class>
  </servlet>

<servlet-mapping>
	<servlet-name>HelloWorld</servlet-name>
	<url-pattern>/HelloWorld</url-pattern>
	</servlet-mapping>

</web-app>

after starting apache tomcat 6.0.32
in the browser:
http://localhost:8080/myworld/HelloWorld

error:
HTTP Status 503 - This application is not currently available

Hi Madhurt,

I am not familiar with tomcat, but usually, the WEB-INF\classes folder needs to contain the compiled classes, not the source code. Everything else looks fine.

Best regards
Christian

yes it contains the .class file in the classes folder

Check your Tomcat logs. If the entire application is not available then something must have gone wrong while deploying, and your log files should tell you what.

And can you please UseCodeTags next time? Thanks.

<log>

Mar 19, 2012 5:27:10 AM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
Mar 19, 2012 5:27:10 AM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()
Mar 19, 2012 5:27:56 AM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextDestroyed()
Mar 19, 2012 5:27:56 AM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextDestroyed()

</log>

i have tried jsp they are woking fine...

Your code works. I agree with Rob; something went wrong with the deployment or your tomcat setup. The catalina.out log file should give you a clue as to what went wrong.

here's the log file...
<catalina log>

Mar 19, 2012 7:15:32 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.5.0_06\bin;.;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Java\jdk1.6.0_21\bin;C:\Program Files\MySQL\MySQL Server 5.1\bin;C:\Program Files\apache-tomcat-6.0.32\lib\servlet-api.jar;C:\Program Files\Microsoft SQL Server\80\Tools\BINN;C:\Program Files\apache-tomcat-6.0.32\lib\catalina.jar;C:\Program Files\apache-tomcat-6.0.32\lib\jasper.jar;
Mar 19, 2012 7:15:33 AM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
Mar 19, 2012 7:15:33 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1251 ms
Mar 19, 2012 7:15:33 AM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Mar 19, 2012 7:15:33 AM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.32
Mar 19, 2012 7:15:33 AM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor host-manager.xml
Mar 19, 2012 7:15:34 AM org.apache.catalina.startup.HostConfig deployDescriptor
INFO: Deploying configuration descriptor manager.xml
Mar 19, 2012 7:15:35 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory docs
Mar 19, 2012 7:15:35 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory examples
Mar 19, 2012 7:15:35 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory r1
Mar 19, 2012 7:15:35 AM org.apache.tomcat.util.modeler.Registry registerComponent
SEVERE: Null component Catalina:type=JspMonitor,name=jsp,WebModule=//localhost/r1,J2EEApplication=none,J2EEServer=none
Mar 19, 2012 7:15:35 AM org.apache.catalina.startup.HostConfig deployDirectory
SEVERE: Error deploying web application directory r1
java.lang.UnsupportedClassVersionError: Bad version number in .class file (unable to load class Hello)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2822)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1159)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1647)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
at org.apache.catalina.startup.WebAnnotationSet.loadApplicationServletAnnotations(WebAnnotationSet.java:108)
at org.apache.catalina.startup.WebAnnotationSet.loadApplicationAnnotations(WebAnnotationSet.java:58)
at org.apache.catalina.startup.ContextConfig.applicationAnnotationsConfig(ContextConfig.java:297)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1078)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4611)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1079)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1315)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
at org.apache.catalina.core.StandardService.start(StandardService.java:525)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
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:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Mar 19, 2012 7:15:35 AM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory ROOT
Mar 19, 2012 7:15:35 AM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Mar 19, 2012 7:15:35 AM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Mar 19, 2012 7:15:35 AM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/50 config=null
Mar 19, 2012 7:15:35 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2332 ms
Mar 19, 2012 7:15:51 AM org.apache.coyote.http11.Http11Protocol pause
INFO: Pausing Coyote HTTP/1.1 on http-8080

</catalina log>

Bad version number in .class file

thank you its working now.