HTTP Status 404 - Servlet HelloServlet is not available using apache tomcat 6

Question

Apr 28, 2012 3:48:02 PM org.apache.catalina.core.ApplicationContext log
SEVERE: Error loading WebappClassLoader
  context: /hello
  delegate: false
  repositories:
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@6eb38a
 HelloServlet
java.lang.ClassNotFoundException: HelloServlet
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
    at java.lang.Thread.run(Unknown Source)
Apr 28, 2012 3:48:02 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Allocate exception for servlet HelloServlet
java.lang.ClassNotFoundException: HelloServlet
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
    at java.lang.Thread.run(Unknown Source)
Apr 28, 2012 3:48:23 PM org.apache.catalina.core.StandardWrapperValve invoke
INFO: Servlet HelloServlet is currently unavailable

score 0 · Answer 1 · answered Apr 28 '12 at 13:26

0

Check the $TOMCAT_HOME$/webapps/hello/WEB-INF/classes folder, does this have a compiled version of your HelloServlet (HelloServlet.class).

What's the fully qualified package name of your HelloServlet class - You need to make sure your web.xml referenced the fully qualified name (if your HelloServlet has the package definition of x.y.x, then web.xml needs to reference x.y.z.HelloServlet)

answered Apr 28 '12 at 13:26

Chris White

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My HelloServlet.class file is in webapps/hello/WEB-INF/classes/HelloServlet.class. – Abhiruchi Sharma Apr 30 '12 at 05:37
I had wrote in the taghello.HelloServlet it is still giving the same error. – Abhiruchi Sharma Apr 30 '12 at 05:44
Your class needs to be in `webapps/hello/WEB-INF/classes/hello/HelloServlet.class` – Chris White Apr 30 '12 at 10:16
Packageless servlets works in old Tomcat versions only. – Hardik Mishra May 01 '12 at 07:51

score 0 · Answer 2 · answered Mar 25 '14 at 07:44

1 - Go to you web.xml file in the project.

2 - See the tag <servlet-class> and make sure that this should be in the following format. eclipsePackage.JavaClass.

The problem is very descriptive, that it is unable to load the specified class because it couldn't locate it. the location comes from web.xml . make sure the path is correct in the mentioned tab.

HTTP Status 404 - Servlet HelloServlet is not available using apache tomcat 6

2 Answers2