Why doesn't GlassFish 6.2.3 see javax.faces.webapp.FacesServlet?

Question

Java

Hello! Please help, glassfish refuses to accept servlet's faces mapping in the web.xml file.
The following lines:

<servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>/faces/*</url-pattern>
    </servlet-mapping>

Without this config, everything works fine, but, of course, it does not display jsf elements. And when I add mapping, the following error occurs:
java.lang.ClassNotFoundException: javax.faces.webapp.FacesServlet
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1577)
at org.glassfish.web.loader .WebappClassLoader.loadClass(WebappClassLoader.java:1427)
at org.apache.catalina.core.StandardWrapper.loadServletClass(StandardWrapper.java:1391)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1257)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1239)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5343)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:5588)
at com.sun.enterprise.web.WebModule.start(WebModule.java:510)
at org.apache.catalina.core.ContainerBase.addChildInternal (ContainerBase.java:877)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:860)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:644)
at com.sun. enterprise.web.WebContainer.loadWebModule(WebContainer.java:2020)
at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1666)
at com.sun.enterprise.web.WebApplication.start(WebApplication.java: 82)
at org.glassfish.internal.data.EngineRef.start(EngineRef.java:98)
at org.glassfish.internal.data.ModuleInfo.start(ModuleInfo.java:267)
at org.glassfish.internal.data.ApplicationInfo.start(ApplicationInfo.java:328)
at com.sun.enterprise.v3.server.ApplicationLifecycle .deploy(ApplicationLifecycle.java:480)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:199)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:467)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:516)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:512)
at java.base/ java.security.AccessController.doPrivileged(Native Method)
at java.base/javax.security.auth.Subject.doAs(Subject.java:361)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:511)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:542)
at com.sun.enterprise .v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:534)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/javax.security.auth.Subject.doAs(Subject.java :361)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:533)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1441)
at com.sun. enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1823)
at org.glassfish.deployment.autodeploy.AutoOperation.run(AutoOperation.java:140)
at org.glassfish.deployment.autodeploy.AutoDeployer.deploy(AutoDeployer.java:573
) (AutoDeployer.java:460)
at org.glassfish.deployment.autodeploy.AutoDeployer.run(AutoDeployer.java:388)
at org.glassfish.deployment.autodeploy.AutoDeployer.run(AutoDeployer.java:379)
at org.glassfish. deployment.autodeploy.AutoDeployService$1.run(AutoDeployService.java:209)
at java.base/java.util.TimerThread.mainLoop(Timer.java:556)
at java.base/java.util.TimerThread.run(Timer.java :506)

Tried other versions of glassfish, but it's not any better...

Answer 1

In general, they answered me on stackoverflow. I'll leave this answer here in case someone suddenly encounters the same problem)
GlassFish 6.2.3 implements Jakarta EE 9.1 and Faces 3.0. These use the Jakarta namespace. Your servlet declaration should therefor be:

<servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>jakarta.faces.webapp.FacesServlet</servlet-class>
</servlet>

Note that instead of defining a servlet in web.xml, you can also make use of the @FacesConfig annotation in your application. This will default map all your views to .xhtml.

Answer 2

java.lang.ClassNotFoundException: javax.faces.webapp.FacesServlet
Means jvm can't find required class in classpath
Try putting it there.