Bug#1036798: jetty9: Failed startup of context: JettyJasperInitializer not a subtype of javax.servlet.ServletContainerInitializer

[Emmanuel Bourg]

Package: jetty9
Version: 9.4.50-3
Severity: grave
Justification: renders package unusable

The jetty9 package can no longer run web applications after switching
to libtomcat10-java for the JSP compiler. The following error appears
in the log:

  java.util.ServiceConfigurationError: javax.servlet.ServletContainerInitializer: org.eclipse.jetty.apache.jsp.JettyJasperInitializer not a subtype
        at java.base/java.util.ServiceLoader.fail(ServiceLoader.java:593)
        at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNextService(ServiceLoader.java:1244)
        at java.base/java.util.ServiceLoader$LazyClassPathLookupIterator.hasNext(ServiceLoader.java:1273)
        at java.base/java.util.ServiceLoader$2.hasNext(ServiceLoader.java:1309)
        at java.base/java.util.ServiceLoader$3.hasNext(ServiceLoader.java:1393)
        at org.eclipse.jetty.annotations.AnnotationConfiguration.getNonExcludedInitializers(AnnotationConfiguration.java:829)
        at org.eclipse.jetty.annotations.AnnotationConfiguration.configure(AnnotationConfiguration.java:343)
        at org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:498)
        at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1409)
        at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:916)
        at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:288)
        at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:524)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:46)
        at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:188)
        at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:517)
        at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:157)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:173)
        at org.eclipse.jetty.deploy.providers.WebAppProvider.fileAdded(WebAppProvider.java:428)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:66)
        at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:785)
        at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:754)
        at org.eclipse.jetty.util.Scanner.scan(Scanner.java:641)
        at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:540)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:146)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:605)
        at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:252)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
        at org.eclipse.jetty.server.Server.start(Server.java:423)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:117)
        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:97)
        at org.eclipse.jetty.server.Server.doStart(Server.java:387)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.xml.XmlConfiguration.lambda$main$3(XmlConfiguration.java:1907)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:569)
        at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1857)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at org.eclipse.jetty.start.Main.invokeMain(Main.java:218)
        at org.eclipse.jetty.start.Main.start(Main.java:491)
        at org.eclipse.jetty.start.Main.main(Main.java:77)


Reverting back to libtomcat9-java fixes the issue.

Using the Jasper compiler from Tomcat 10 with Jetty 9 is unlikely to work
properly since the source files generated will use the servlet classes
from the jakarta namespace and Jetty 9 doesn't implement them.

Emmmanuel Bourg