Thanks in advance for your time to help with this issue. After much hard work, we finally resolved all of the errors related to the GWT compilation process for our application upgraded from GWT 2.5 to 2.9, from JDK 8 to JDK 11.
However, when I run the application with "Run as -> GWT development mode with Jetty", I got the following error and warning: I searched online for the error highlighted below and the post said this error can be ignored. When we created ear file and deployed it to Weblogic server 14 and it gave HTTP ERROR: 503: SERVICE_UNAVAILABLE It would be great if you can help shed some light on this issue. Running CodeServer with parameters: [-noprecompile, -port, 9876, -sourceLevel, 1.8, -bindAddress, 127.0.0.1, -launcherDir, C:\Users\jiny\gitTestUpgrade\aries\war, -logLevel, INFO, -style, OBFUSCATED, edu.vanderbilt.mc.aries.ARIES] Super Dev Mode starting up workDir: C:\Users\jiny\AppData\Local\Temp\gwt-codeserver-15364372133406537389.tmp Loading Java files in edu.vanderbilt.mc.aries.ARIES. Ignored 9 units with compilation errors in first pass. Compile with -strict or with -logLevel set to TRACE or DEBUG to see all errors. Module setup completed in 4592 ms The code server is ready at http://127.0.0.1:9876/ Code server started in 4.878 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$AppClassLoader.loadClass(ClassLoaders.java:178) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:315) at com.google.gwt.dev.shell.jetty.JettyLauncher.jreLeakPrevention(JettyLauncher.java:899) at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:722) at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:636) at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:898) at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:705) at com.google.gwt.dev.DevMode.main(DevMode.java:432) Starting Jetty on port 8888 [WARN] java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) at org.eclipse.jetty.annotations.ClassInheritanceHandler.addToInheritanceMap(ClassInheritanceHandler.java:72) at org.eclipse.jetty.annotations.ClassInheritanceHandler.handle(ClassInheritanceHandler.java:58) at org.eclipse.jetty.annotations.AnnotationParser$MyClassVisitor.visit(AnnotationParser.java:480) at org.objectweb.asm.ClassReader.accept(ClassReader.java:533) 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.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$3.run(QueuedThreadPool.java:555) at java.base/java.lang.Thread.run(Thread.java:834) [WARN] Failed startup of context c.g.g.d.s.j.WebAppContextWithReload@491dfd8e{/,file:/C:/Users/jiny/gitTestUpgrade/aries/war/,STARTING}{C:\Users\jiny\gitTestUpgrade\aries\war} java.lang.RuntimeException: Error scanning entry module-info.class from jar file:/C:/Users/jiny/gitTestUpgrade/aries/war/WEB-INF/lib/jakarta.xml.soap-api-1.4.1.jar at org.eclipse.jetty.annotations.AnnotationParser.parseJar(AnnotationParser.java:913) at org.eclipse.jetty.annotations.AnnotationParser.parse(AnnotationParser.java:831) at org.eclipse.jetty.annotations.AnnotationConfiguration$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.base/java.lang.Thread.run(Thread.java:834) Caused by: java.lang.UnsupportedOperationException: This feature requires ASM6 at org.objectweb.asm.ClassVisitor.visitModule(ClassVisitor.java:130) at org.objectweb.asm.ClassReader.readModuleAttributes(ClassReader.java:724) at org.objectweb.asm.ClassReader.accept(ClassReader.java:544) 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.parseJarEntry(AnnotationParser.java:956) at org.eclipse.jetty.annotations.AnnotationParser.parseJar(AnnotationParser.java:909) ... 6 more [ERROR] 503 - GET /ARIES.html (127.0.0.1) 298 bytes Request headers Host: 127.0.0.1:8888 Connection: keep-alive sec-ch-ua: " Not;A Brand";v="99", "Microsoft Edge";v="91", "Chromium";v="91" sec-ch-ua-mobile: ?0 Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36 Edg/91.0.864.54 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9 Sec-Fetch-Site: none Sec-Fetch-Mode: navigate Sec-Fetch-User: ?1 Sec-Fetch-Dest: document Accept-Encoding: gzip, deflate, br Accept-Language: en-US,en;q=0.9 Response headers Date: Fri, 25 Jun 2021 02:01:02 GMT Cache-Control: must-revalidate,no-cache,no-store Content-Type: text/html; charset=ISO-8859-1 Content-Length: 298 [ERROR] 503 - GET /favicon.ico (127.0.0.1) 299 bytes Request headers Host: 127.0.0.1:8888 Connection: keep-alive sec-ch-ua: " Not;A Brand";v="99", "Microsoft Edge";v="91", "Chromium";v="91" sec-ch-ua-mobile: ?0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36 Edg/91.0.864.54 Accept: image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8 Sec-Fetch-Site: same-origin Sec-Fetch-Mode: no-cors Sec-Fetch-Dest: image Referer: http://127.0.0.1:8888/ARIES.html Accept-Encoding: gzip, deflate, br Accept-Language: en-US,en;q=0.9 Response headers Date: Fri, 25 Jun 2021 02:01:02 GMT Cache-Control: must-revalidate,no-cache,no-store Content-Type: text/html; charset=ISO-8859-1 Content-Length: 299 thanks, Jenny -- You received this message because you are subscribed to the Google Groups "GWT Users" group. 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