I am trying to update the hibernate and spring versions used by a legacy
application which uses GWT 2.8.1. Doing so I ran into an issue when
starting the application using the GWT maven plugin's gwt:run or gwt:debug
commands - see the error message at the bottom.
Some search results that I found regarding that error suggest that the
embedded Jetty version has apparently issues with JEP-238 (MultiRelease)
jar files (i.e. .jar files that contain Java 9+ module info files). The
offending classmate-1.5.1.jar seems to be some transitive dependency of the
jackson JSON library and seems to contains such module info data.
Another reference stated that Jetty from v9.4.9 onwards supports such
multi-release .jar files.
But how can I replace the Jetty embedded in the GWT Maven plugin? Or is
there some other way to work-around or fix this?
Would updating the GWT version to 2.8.2 or 2.9.0 solve this issue?
Below is the error message that I get when starting up my application:
...
[WARN] Failed startup of context
c.g.g.d.s.j.WebAppContextWithReload@797f1e2a{/,file:/D:/Projects/RW-Tool/code/rwtool/web/target/rwtool-web-1.8.5-SNAPSHOT/,STARTING}{D:\Projects\RW-Tool\code\rwtool\web\target\rwtool-web-1.8.5-SNAPSHOT}
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$WebAppContextWithReload.doStart(JettyLauncher.java:550)
at
org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
.... some lines removed for brevity ...
at
org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at
com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:760)
at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:636)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:923)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:706)
at com.google.gwt.dev.DevMode.main(DevMode.java:432)
Caused by: java.lang.RuntimeException: Error scanning entry
module-info.class from jar
file:/D:/Projects/RW-Tool/code/rwtool/web/target/rwtool-web-1.8.5-SNAPSHOT/WEB-INF/lib/classmate-1.5.1.jar
at
org.eclipse.jetty.annotations.AnnotationParser.parseJar(AnnotationParser.java:913)
at
org.eclipse.jetty.annotations.AnnotationParser.parse(AnnotationParser.java:831)
at
org.eclipse.jetty.annotations.AnnotationConfiguration$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)
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