Hi All
maybe I can be a little off-topic posting here but this is not an usual
"user" question and hopefully some "contributor" can help me.
I want to understand an error that I get in DevMode. The error is the
following:
------------------------------------------------------------------------------------------------------------
00:00:09,841 [ERROR] Unable to initialize static dispatcher
java.lang.UnsupportedClassVersionError:
com/google/gwt/core/client/JavaScriptObject$ : Unsupported major.minor
version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at java.lang.ClassLoader.defineClass(ClassLoader.java:465)
at
com.google.gwt.dev.shell.CompilingClassLoader.findClass(CompilingClassLoader.java:1121)
at
com.google.gwt.dev.shell.CompilingClassLoader.loadClass(CompilingClassLoader.java:1194)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:249)
at com.google.gwt.dev.shell.JsValueGlue.set(JsValueGlue.java:220)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:129)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:576)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:304)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:347)
at
com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:526)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Thread.java:680)
------------------------------------------------------------------------------------------------------------
I'm not working on the standard release of GWT, I'm running a custom build
coming from current GWT development.
To make things more weird, I'm running the application on a Jetty 7 server
(with -noserver option) and debugging with DevMode using the following code
snippet:
String[] newArgs = ("-noserver -war target/webapp -startupUrl gwt.html"
+ " -logLevel INFO -codeServerPort 9997 "
+ "net.cristcost.test.gwt.DemoApp").split(" ");
DevMode.main(newArgs);
I get that error when I try to open the page with the GWT app in DevMode
(http://localhost:8080/gwt.html?gwt.codesvr=127.0.0.1:9997)
With GWT 2.5.1 everything was working, but I had an issue and I needed to
exclude "org.eclipse.jdt.core" dependency from the project due to
incompatibility with GWT:
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-jsp</artifactId>
<version>${jetty.version}</version>
<scope>test</scope>
<!-- This dependency cause issue in GWT compilation in DevMode -->
<exclusions>
<exclusion>
<artifactId>org.eclipse.jdt.core</artifactId>
<groupId>org.eclipse.jetty.orbit</groupId>
</exclusion>
</exclusions>
</dependency>
(in fact, I am really trying 2.6.0 nightly to see if this problem will
persists)
Can someone give me some light on the error and explain it? I want to see
if I find some workaround.
Thank you,
Cristiano
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