Have you tried setting metadata-complete="true" on the <web-app> of your web.xml? It's supposed to disable annotation scanning AFAICT (but I don't remember how the JettyLauncher configures Jetty so maybe it bypasses this attribute).
On Monday, March 6, 2023 at 4:14:03 PM UTC+1 mmo wrote: > In my last email I forgot to mention: > > I had found this in the Jetty docs ( > https://www.eclipse.org/jetty/documentation/jetty-9/index.html#Other%20Configuration > ): > > > > … > <?xml version="1.0" encoding="ISO-8859-1"?> > > <Configure class="org.eclipse.jetty.webapp.WebAppContext"> > > <Call name="setAttribute"> > > <Arg>org.eclipse.jetty.server.webapp.WebInfIncludeJarPattern</Arg> > > <Arg>.*/spring-[^/]*\.jar$</Arg> > > </Call> > > </Configure> > > … > > > > According to the description this argument is intended to allow > controlling which .jars on the classpath are being scanned for annotations > (in the example above only jars that start with "spring-"), but > unfortunately it had no effect in my case. The below error still appeared > and Jetty doesn’t start up… ☹ > > > > > > > > *From:* Michael Moser <mmo...@gmail.com> > *Sent:* Monday, March 6, 2023 3:43 PM > *To:* google-we...@googlegroups.com > *Subject:* Can one prevent Jetty from scanning specific jars for > annotations? > > > > Hi and sorry - this is only indirectly a GWT question but since it’s > heavily related with GWT someone might have already bumped into the same > issue. > > So I dare to ask it here – maybe someone in this group knows a work-around > (so please bear with me!): > > > > For 4 of our 5 projects using GWT we are still using the “classic” GWT 2.8 > setup, i.e. with the “classic” plugin where one starts Jetty for > development and debugging. > > > > We recently had to upgrade a couple of POI libraries (an Apache library to > generate Office documents from Java) and a few of those new jars obviously > annotations that are not compatible with the Jetty-version used by the GWT > 2.8 plugin. > > > > “Not compatible” meaning, that Jetty during startup fails to scan those > files for certain annotations in > AnnotationConfiguration.scanForAnnotations (full error stack-trace below). > > > > With Tomcat I had a similar (or identical?) issue but Tomcat offers a > configuration option (in catalina.properties) to omit a list of jars from > being scanned for Servlet annotations like so: > > > > … > > # Additional JARs (over and above the default JARs listed above) to skip > when > > # scanning for Servlet 3.0 pluggability features. These features include > web > > # fragments, annotations, SCIs and classes that match @HandlesTypes. The > list > > # must be a comma separated list of JAR file names. > > # added by MMS: these contain an illegal byte tag (for Java 8) in their > constants pool: > > *org.apache.catalina.startup.ContextConfig.jarsToSkip*=\ > > log4j-api-2.17.2.jar,\ > > poi-5.2.3.jar,\ > > poi-ooxml-5.2.3.jar,\ > > poi-ooxml-lite-5.2.3.jar,\ > > xmlbeans-5.1.1.jar > > … > > > > This saved me with Tomcat. But with Jetty I had no luck so far to achieve > something similar. This is now hindering our developer since they can’t run > and debug the application locally anymore. I had planned to move that > project to the new plugin and a local Tomcat only later this year. > > > > Is there **any** way to teach Jetty to **not** do these Annotation > scannings, either, or otherwise prevent these jars from being scanned? > > > > > > The full error stacktrace: > > > > ... > > 00:00:11.874 [WARN] Failed startup of context > c.g.g.d.s.j.WebAppContextWithReload@31419990{/,file:/D:/Projects/KStA_ZH_ZHQuest/code/application/zhquest-web/target/zhquest/,STARTING}{D:\Projects\KStA_ZH_ZHQuest\code\application\zhquest-web\target\zhquest} > > org.eclipse.jetty.util.MultiException: Multiple exceptions > > at > org.eclipse.jetty.annotations.AnnotationConfiguration.scanForAnnotations(AnnotationConfiguration.java:536) > > > > at > org.eclipse.jetty.annotations.AnnotationConfiguration.configure(AnnotationConfiguration.java:447) > > > > at > org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:479) > > at > org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1337) > > > at > org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741) > > > > at > org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505) > > at > com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:550) > > > > at > org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) > > > > at > org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) > > > > at > org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) > > > > at > org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) > > > > at > org.eclipse.jetty.server.handler.RequestLogHandler.doStart(RequestLogHandler.java:140) > > > > at > org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) > > > > at > org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) > > > > at org.eclipse.jetty.server.Server.start(Server.java:387) > > at > org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) > > > > at > org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) > > > > at org.eclipse.jetty.server.Server.doStart(Server.java:354) > > at > org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) > > > > at > com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:760) > > at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:636) > > at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:923) > > at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:706) > > at com.google.gwt.dev.DevMode.main(DevMode.java:432) Caused by: > org.eclipse.jetty.util.MultiException: Multiple exceptions > > at > org.eclipse.jetty.annotations.AnnotationParser.parseJar(AnnotationParser.java:899) > > > > at > org.eclipse.jetty.annotations.AnnotationParser.parse(AnnotationParser.java:831) > > > > at > org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call(AnnotationConfiguration.java:163) > > > > at > org.eclipse.jetty.annotations.AnnotationConfiguration$1.run(AnnotationConfiguration.java:548) > > > > at > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) > > > > at > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) > > > > at java.lang.Thread.run(Thread.java:748) > > Caused by: java.lang.RuntimeException: Error scanning entry > META-INF/versions/9/org/apache/logging/log4j/util/Base64Util.class from jar > file:/D:/Projects/KStA_ZH_ZHQuest/code/application/zhquest-web/target/zhquest/WEB-INF/lib/log4j-api-2.17.2.jar > > > > at > org.eclipse.jetty.annotations.AnnotationParser.parseJar(AnnotationParser.java:913) > > > > at > org.eclipse.jetty.annotations.AnnotationParser.parse(AnnotationParser.java:831) > > > > at > org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call(AnnotationConfiguration.java:163) > > > > at > org.eclipse.jetty.annotations.AnnotationConfiguration$1.run(AnnotationConfiguration.java:548) > > > > at > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) > > > > at > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) > > > > at java.lang.Thread.run(Thread.java:748) Caused by: > java.lang.IllegalArgumentException: null > > at org.objectweb.asm.ClassReader.<init>(Unknown Source) > > at org.objectweb.asm.ClassReader.<init>(Unknown Source) > > at org.objectweb.asm.ClassReader.<init>(Unknown Source) > > at > org.eclipse.jetty.annotations.AnnotationParser.scanClass(AnnotationParser.java:973) > > > > at > org.eclipse.jetty.annotations.AnnotationParser.parseJarEntry(AnnotationParser.java:956) > > > > at > org.eclipse.jetty.annotations.AnnotationParser.parseJar(AnnotationParser.java:909) > > > > at > org.eclipse.jetty.annotations.AnnotationParser.parse(AnnotationParser.java:831) > > > > at > org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call(AnnotationConfiguration.java:163) > > > > at > org.eclipse.jetty.annotations.AnnotationConfiguration$1.run(AnnotationConfiguration.java:548) > > > > at > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) > > > > at > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) > > > > at java.lang.Thread.run(Thread.java:748) > > > -- You received this message because you are subscribed to the Google Groups "GWT Users" group. 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