JAVA 21 - GWT 2.11.0 - Unable to get known Configuration java.util.ServiceConfigurationError

[ibrahimali123]

My Project is running locally correctly, but it gives me this error in the Google app engine logs staging and is not working. I don't know what this error means.

`Unable to get known Configuration java.util.ServiceConfigurationError: at org.eclipse.jetty.util.ServiceLoaderSpliterator$ServiceProvider.get(ServiceLoaderSpliterator.java:101)
at org.eclipse.jetty.ee8.webapp.Configurations.lambda$getKnown$0(Configurations.java:77)
at org.eclipse.jetty.util.ServiceLoaderSpliterator.tryAdvance(ServiceLoaderSpliterator.java:46)
at java.base/java.util.Spliterator.forEachRemaining(Spliterator.java:332)
at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
at org.eclipse.jetty.ee8.webapp.Configurations.getKnown(Configurations.java:75)
at org.eclipse.jetty.ee8.webapp.WebAppContext.preConfigure(WebAppContext.java:447)
at org.eclipse.jetty.ee8.webapp.WebAppContext.doStart(WebAppContext.java:500)
at com.google.apphosting.runtime.jetty.ee8.AppEngineWebAppContext.doStart(AppEngineWebAppContext.java:237)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:93)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:113)
at org.eclipse.jetty.server.Handler$Abstract.doStart(Handler.java:491)
at org.eclipse.jetty.server.handler.ContextHandler.lambda$doStart$0(ContextHandler.java:754)
at org.eclipse.jetty.server.handler.ContextHandler$ScopedContext.call(ContextHandler.java:1452)
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:754)
at org.eclipse.jetty.ee8.nested.ContextHandler$CoreContextHandler.doStart(ContextHandler.java:2269)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:93)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:169)
at org.eclipse.jetty.util.component.ContainerLifeCycle.addManaged(ContainerLifeCycle.java:482)
at org.eclipse.jetty.server.handler.HotSwapHandler.setHandler(HotSwapHandler.java:74)
at com.google.apphosting.runtime.jetty.AppVersionHandler.ensureHandler(AppVersionHandler.java:97)
at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:235)
at com.google.apphosting.runtime.RequestRunner.dispatchServletRequest(RequestRunner.java:349)
at com.google.apphosting.runtime.RequestRunner.dispatchRequest(RequestRunner.java:234)
at com.google.apphosting.runtime.RequestRunner.run(RequestRunner.java:200)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:273)
at java.base/java.lang.Thread.run(Thread.java:1583)

Caused by: java.util.ServiceConfigurationError: org.eclipse.jetty.ee8.webapp.Configuration: org.eclipse.jetty.ee8.webapp.WebAppConfiguration 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.util.ServiceLoaderSpliterator.tryAdvance(ServiceLoaderSpliterator.java:37)
... 25 more
`

I am using gwt-dev 2.11.0 (the latest one) and using jetty-ee8

Here is my appengine-web.xml:
<property name="appengine.use.EE8" value="true"/>

This is a sample from the dependency tree:
+- org.gwtproject:gwt-dev:jar:2.11.0:compile | +- com.google.code.findbugs:jsr305:jar:3.0.2:compile | +- com.google.code.gson:gson:jar:2.6.2:compile | +- org.ow2.asm:asm:jar:9.2:compile | +- org.ow2.asm:asm-util:jar:9.2:compile | | +- org.ow2.asm:asm-tree:jar:9.2:compile | | \- org.ow2.asm:asm-analysis:jar:9.2:compile | +- org.ow2.asm:asm-commons:jar:9.2:compile [INFO] | +- colt:colt:jar:1.2.0:compile [INFO] | +- commons-collections:commons-collections:jar:3.2.2:compile [INFO] | +- commons-io:commons-io:jar:2.4:compile [INFO] | +- com.ibm.icu:icu4j:jar:63.1:compile [INFO] | +- tapestry:tapestry:jar:4.0.2:compile [INFO] | +- org.eclipse.jetty:jetty-webapp:jar:9.4.44.v20210927:compile [INFO] | | +- org.eclipse.jetty:jetty-xml:jar:9.4.44.v20210927:compile [INFO] | | \- org.eclipse.jetty:jetty-servlet:jar:9.4.44.v20210927:compile [INFO] | | +- org.eclipse.jetty:jetty-security:jar:9.4.44.v20210927:compile [INFO] | | | \- org.eclipse.jetty:jetty-server:jar:9.4.44.v20210927:compile [INFO] | | \- org.eclipse.jetty:jetty-util-ajax:jar:9.4.44.v20210927:compile [INFO] | +- org.eclipse.jetty:jetty-servlets:jar:9.4.44.v20210927:compile [INFO] | | +- org.eclipse.jetty:jetty-continuation:jar:9.4.44.v20210927:compile [INFO] | | +- org.eclipse.jetty:jetty-http:jar:9.4.44.v20210927:compile [INFO] | | +- org.eclipse.jetty:jetty-util:jar:9.4.44.v20210927:compile [INFO] | | \- org.eclipse.jetty:jetty-io:jar:9.4.44.v20210927:compile [INFO] | +- org.eclipse.jetty:jetty-annotations:jar:9.4.44.v20210927:compile [INFO] | | +- org.eclipse.jetty:jetty-plus:jar:9.4.44.v20210927:compile [INFO] | | | \- org.eclipse.jetty:jetty-jndi:jar:9.4.44.v20210927:compile [INFO] | | \- javax.annotation:javax.annotation-api:jar:1.3.2:compile [INFO] | \- org.eclipse.jetty:apache-jsp:jar:9.4.44.v20210927:compile [INFO] | +- org.eclipse.jetty.toolchain:jetty-schemas:jar:3.1.2:compile [INFO] | \- org.mortbay.jasper:apache-jsp:jar:8.5.70:compile [INFO] | +- org.mortbay.jasper:apache-el:jar:8.5.70:compile [INFO] | \- org.eclipse.jdt:ecj:jar:3.19.0:compile

[zhumin8]

Thanks for reporting with us. Can you elaborate on if or why do you think it's a bug with this library? Or can you create a simpler reproducer code so we can investigate further?
If you have a support contract with Google, please create an issue in the support console instead of filing on GitHub. This will ensure a timely response.