Eclpse GWT 3.0 plugin not available

[Ying Jin]

We tried to install GWT plugin 3.0 from Eclipse market place on a new laptop for 

Eclipse Version: 2020-06 (4.16.0), but we got the following not available error message.

This approach worked several months ago, so we're not sure why we got this error now.

Please help give some suggestions for this issue.

Your help is much appreciated!

thanks,

Jenny

[hprc]

GWT Plugin 4.0 is a test but has been released.
https://eclipse.gwtproject.org.vertispan.com/2023-02-01
In my environment, by setting the compiler and facet to Java8, I have confirmed that it works on 2022-12 as well.

Also, the GWT-eclipse-plugin is discussed at the following URL.
https://gitter.im/gwt-plugins/gwt-eclipse-plugin

2023年2月7日火曜日 1:29:18 UTC+9 jiny...@gmail.com:

[Ying Jin]

Thanks very much for your suggestion!

Therefore, we're going to use the update site below to install GWT Plugin 4.0. Please correct me if it is not right.

https://eclipse.gwtproject.org.vertispan.com/2023-02-01

BTW, does it work with JDK 11? We're using GWT 2.9 version and it needs JDK 11 for local debugging.

In addition, I checked the discussion site. It seems that the updated site is still not available in the Eclipse marketplace yet.

thanks,

Jenny

[hprc]

no

I have confirmed that it works only with Java8 + GWT sdk 2.8 or 2.9.

When using JDK17, the following error is displayed.
It's been discussed in the thread, but I think it's probably a problem with Jetty's JDK support.
I don't understand the details.

The stack trace is shown below.

*********************************************************************************************************

Running CodeServer with parameters: [-noprecompile, -port, 9876, -sourceLevel, 1.8, -bindAddress, 127.0.0.1, -launcherDir, C:\pleiades-2022-12-java-win-64bit-jre_20230124\workspace\GWT29_JDK11\war, -logLevel, INFO, -style, OBFUSCATED, kut.hp_rc.GWT29_JDK11]
Super Dev Mode starting up
   workDir: C:\Users\kazuo\AppData\Local\Temp\gwt-codeserver-7013139281438506203.tmp
2023-02-08 07:28:33.263:INFO::main: Logging initialized @2024ms
   Loading Java files in kut.hp_rc.GWT29_JDK11.
   Module setup completed in 2803 ms
2023-02-08 07:28:35.350:INFO:oejs.Server:main: jetty-9.2.z-SNAPSHOT
2023-02-08 07:28:35.373:INFO:oejsh.ContextHandler:main: Started o.e.j.s.ServletContextHandler@7bbec1cc{/,null,AVAILABLE}
2023-02-08 07:28:35.408:INFO:oejs.ServerConnector:main: Started ServerConnector@5324647{HTTP/1.1}{127.0.0.1:9876}
2023-02-08 07:28:35.408:INFO:oejs.Server:main: Started @4170ms

The code server is ready at http://127.0.0.1:9876/
Code server started in 3.106 s ms
[ERROR] jreLeakPrevention.gcDaemonFail
java.lang.ClassNotFoundException: sun.misc.GC
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    at java.base/java.lang.Class.forName0(Native Method)
    at java.base/java.lang.Class.forName(Class.java:315)
    at com.google.gwt.dev.shell.jetty.JettyLauncher.jreLeakPrevention(JettyLauncher.java:899)
    at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:722)
    at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:636)
    at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:898)
    at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:705)
    at com.google.gwt.dev.DevMode.main(DevMode.java:432)
2023-02-08 07:28:35.606:INFO:oejs.Server:main: jetty-9.2.z-SNAPSHOT
Starting Jetty on port 8888
   [WARN] Failed startup of context c.g.g.d.s.j.WebAppContextWithReload@65d26881{/,file:/C:/pleiades-2022-12-java-win-64bit-jre_20230124/workspace/GWT29_JDK11/war/,STARTING}{C:\pleiades-2022-12-java-win-64bit-jre_20230124\workspace\GWT29_JDK11\war}
MultiException[java.lang.RuntimeException: Error scanning file GWT29_JDK11$1.class, java.lang.RuntimeException: Error scanning file GWT29_JDK11$1MyHandler$1.class, java.lang.RuntimeException: Error scanning file GWT29_JDK11$1MyHandler.class, java.lang.RuntimeException: Error scanning file GWT29_JDK11.class]
    at org.eclipse.jetty.annotations.AnnotationConfiguration.scanForAnnotations(AnnotationConfiguration.java:536)
    at org.eclipse.jetty.annotations.AnnotationConfiguration.configure(AnnotationConfiguration.java:447)
    at org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:479)
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1337)
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741)
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505)
    at com.google.gwt.dev.shell.jetty.JettyLauncher$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:898)
    at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:705)
    at com.google.gwt.dev.DevMode.main(DevMode.java:432)
Caused by: MultiException[java.lang.RuntimeException: Error scanning file GWT29_JDK11$1.class, java.lang.RuntimeException: Error scanning file GWT29_JDK11$1MyHandler$1.class, java.lang.RuntimeException: Error scanning file GWT29_JDK11$1MyHandler.class, java.lang.RuntimeException: Error scanning file GWT29_JDK11.class]
    at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:681)
    at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:688)
    at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:688)
    at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:688)
    at org.eclipse.jetty.annotations.AnnotationParser.parse(AnnotationParser.java:824)
    at org.eclipse.jetty.annotations.AnnotationConfiguration$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.base/java.lang.Thread.run(Thread.java:829)
    Suppressed: java.lang.RuntimeException: Error scanning file GWT29_JDK11$1MyHandler$1.class
        at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:708)
        ... 9 more
    Caused by: java.lang.UnsupportedOperationException: This feature requires ASM7
        at org.objectweb.asm.ClassVisitor.visitNestHost(ClassVisitor.java:150)
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:550)
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:400)
        at org.eclipse.jetty.annotations.AnnotationParser.scanClass(AnnotationParser.java:974)
        at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:702)
        ... 9 more
    Suppressed: java.lang.RuntimeException: Error scanning file GWT29_JDK11$1MyHandler.class
        at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:708)
        ... 9 more
    Caused by: java.lang.UnsupportedOperationException: This feature requires ASM7
        at org.objectweb.asm.ClassVisitor.visitNestHost(ClassVisitor.java:150)
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:550)
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:400)
        at org.eclipse.jetty.annotations.AnnotationParser.scanClass(AnnotationParser.java:974)
        at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:702)
        ... 9 more
    Suppressed: java.lang.RuntimeException: Error scanning file GWT29_JDK11.class
        at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:708)
        ... 9 more
    Caused by: java.lang.UnsupportedOperationException: This feature requires ASM7
        at org.objectweb.asm.ClassVisitor.visitNestMember(ClassVisitor.java:236)
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:660)
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:400)
        at org.eclipse.jetty.annotations.AnnotationParser.scanClass(AnnotationParser.java:974)
        at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:702)
        ... 9 more
Caused by: java.lang.RuntimeException: Error scanning file GWT29_JDK11$1.class
    at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:708)
    ... 9 more
Caused by: java.lang.UnsupportedOperationException: This feature requires ASM7
    at org.objectweb.asm.ClassVisitor.visitNestHost(ClassVisitor.java:150)
    at org.objectweb.asm.ClassReader.accept(ClassReader.java:550)
    at org.objectweb.asm.ClassReader.accept(ClassReader.java:400)
    at org.eclipse.jetty.annotations.AnnotationParser.scanClass(AnnotationParser.java:974)
    at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:702)
    ... 9 more
2023-02-08 07:28:37.073:INFO:oejs.ServerConnector:main: Started ServerConnector@33f918c3{HTTP/1.1}{127.0.0.1:8888}
2023-02-08 07:28:37.073:INFO:oejs.Server:main: Started @5835ms

2023年2月8日水曜日 4:25:02 UTC+9 jiny...@gmail.com:

[Norman Andres Agudelo Mejia]

Eclipse GWT 3.0 plugin works so well in 2021-09 version,  Also is avalaible on marketplace to that Eclipse versión. 

[Colin Alworth]

Error scanning file GWT29_JDK11.class
        at org.eclipse.jetty.annotations.AnnotationParser.parseDir(AnnotationParser.java:708)

This error should be fixed with GWT 2.10.0, or by disabling the annotation-based servlet configurations. A very similar issue is discussed at https://github.com/gwtproject/gwt/issues/9606.

Alternatively, strongly consider dividing client and server classpaths, and only using DevMode (or better, CodeServer) to serve your GWT client content, and use your intended servlet container for server code. Doing so will avoid this and many other issues, which stem from the Jetty in dev mode being configured and updated for the purposes of DevMode first and foremost.

[hprc]

Thank you Colin!

2023年3月21日火曜日 11:31:24 UTC+9 Colin Alworth: