Question

I tried to deploy a servlet I have created to Glassfish application server, and I seem to have hit a bit of a stumbling block. The code deploys fine to the auto deploy folder, and once it’s deployed the following is written to the log file:

[#|2009-03-16T13:41:29.303+0000|INFO|sun-appserver2.1|javax.enterprise.system.tools.deployment|_ThreadID=23;_ThreadName=Timer-7;|[AutoDeploy] Selecting file /opt/glassfish-2.1.b60e/domains/imageTransformer/autodeploy/image-transformer.war for autodeployment.|#]  [#|2009-03-16T13:41:29.304+0000|INFO|sun-appserver2.1|javax.enterprise.system.tools.deployment|_ThreadID=23;_ThreadName=Timer-7;|Autoundeploying application :image-transformer|#]  [#|2009-03-16T13:41:29.360+0000|INFO|sun-appserver2.1|javax.enterprise.system.stream.out|_ThreadID=23;_ThreadName=Timer-7;| classLoader = WebappClassLoader   delegate: true   repositories:     /WEB-INF/classes/ ----------> Parent Classloader: EJBClassLoader :  urlSet = [] doneCalled = false   Parent -> java.net.URLClassLoader@39cf701c  |#]  [#|2009-03-16T13:41:29.361+0000|INFO|sun-appserver2.1|javax.enterprise.system.stream.out|_ThreadID=23;_ThreadName=Timer-7;| SharedSecrets.getJavaNetAccess()=java.net.URLClassLoader$7@5e7408d9|#]  [#|2009-03-16T13:41:29.487+0000|INFO|sun-appserver2.1|javax.enterprise.system.tools.deployment|_ThreadID=23;_ThreadName=Timer-7;|[AutoDeploy] Successfully autoundeployed : /opt/glassfish-2.1.b60e/domains/imageTransformer/autodeploy/image-transformer.war.|#]  [#|2009-03-16T13:41:29.612+0000|INFO|sun-appserver2.1|javax.enterprise.system.tools.deployment|_ThreadID=23;_ThreadName=Timer-7;|deployed with moduleid = image-transformer|#]  [#|2009-03-16T13:41:29.783+0000|INFO|sun-appserver2.1|javax.enterprise.system.tools.deployment|_ThreadID=23;_ThreadName=Timer-7;|[AutoDeploy] Successfully autodeployed : /opt/glassfish-2.1.b60e/domains/imageTransformer/autodeploy/image-transformer.war.|#] 

So no obvious errors, but after that I get a 404 from accessing the path that the servlet should be bound to. Is there another step that I need to go through?

the web.xml in my WAR file looks like this:

<web-app>      <servlet>        <servlet-name>MyServlet</servlet-name>          <servlet-class>my.servlet.MyServlet</servlet-class>      </servlet>      <servlet-mapping>         <servlet-name>MyServlet</servlet-name>         <url-pattern>/hello</url-pattern>     </servlet-mapping>  </web-app> 

Answer 1

There were a couple of problems with this deployment. Firstly, there is a requirement for a second configuration file to be included in the WEB-INF directory, named sun-web.xml. Its contents need to be something along the lines of:

<?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE sun-web-app PUBLIC '-//Sun Microsystems, Inc.//DTD Application Server 8.1 Servlet 2.4//EN' 'http://www.sun.com/software/appserver/dtds/sun-web-app_2_4-1.dtd'> <sun-web-app error-url=''>     <context-root>/MyServlet </context-root> </sun-web-app> 

It seems to have the potential to get a lot more complex than this (see the documentation).

Secondly, I had to change the header for the web.xml file, so it read accordingly:

<?xml version='1.0' encoding='UTF-8'?> <web-app xmlns='http://java.sun.com/xml/ns/j2ee'         xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'         xsi:schemaLocation='http://java.sun.com/xml/ns/j2ee         http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd'         version='2.4'>     <servlet>         <servlet-name>MyServlet</servlet-name>         <servlet-class>my.servlet.MyServlet</servlet-class>     </servlet>      <servlet-mapping>         <servlet-name>MyServlet</servlet-name>         <url-pattern>/hello</url-pattern>     </servlet-mapping> </web-app> 

Note the headers indicating that this is servlet spec 2.4.

Finally, it also seems that you can’t access this servlet directly; you have to prepend MyServlet/ (or the servlet specific name) to the beginning of the path. So to access this servlet requires you to visit /MyServlet/hello.