我正在构建一个简单的SpringRoo + GWT应用程序以部署到GAE。我刚刚处于发展的初始阶段。我有一个使用SpringRoo生成的简单index.jspx页面，由SpringMVC控制器（也由SpringRoo生成）处理。我遇到了这个错误：构造处理器对象时抛出异常：org / datanucleus / exceptions / NucleusException运行mvn gwt：run之后。错误发生在编译错误中。
所以我运行了mvn -X gwt：run来调试代码执行。输出显示：
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] error: Exception thrown while constructing Processor object: org/datanuc
leus/exceptions/NucleusException
[INFO] 1error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3:17.328s
[INFO] Finished at: Fri Feb 11 13:44:59 GMT 2011
[INFO] Final Memory: 12M/23M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.
1:compile (default-compile) on project opevel: Compilation failure
[ERROR] error: Exception thrown while constructing Processor object: org/datanuc
leus/exceptions/NucleusException
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal o
rg.apache.maven.plugins:maven-compiler-plugin:2.1:compile (default-compile) on p
roject: Compilation failure
error: Exception thrown while constructing Processor object: org/datanucleus/exc
eptions/NucleusException
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:213)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:145)
at org.apache.maven.lifecycle.internal.MojoExecutor.executeForkedExecuti
ons(MojoExecutor.java:365)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:199)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProje
ct(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBu
ild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(Lifecycl
eStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:534)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Laun
cher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.jav
a:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(La
uncher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:
352)
Caused by: org.apache.maven.plugin.CompilationFailureException: Compilation fail
ure
error: Exception thrown while constructing Processor object: org/datanucleus/exc
eptions/NucleusException
at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompiler
Mojo.java:613)
at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:116)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(Default
BuildPluginManager.java:107)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor
.java:209)
... 23 more
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureExc
eption
我检查了帮助网站，它说它与maven插件有关。有点谷歌搜索指向maven datacleus插件，但在任何地方都没有复制此类错误。我还看到一篇帖子与jspx缺乏GAE支持有关。但我尚未部署到gae。我只想在GWT开发模式下测试应用程序。
只是说，我还在学习SpringRoo + GAE架构。将不胜感激任何帮助。
此致