當從hibernate-maven-plugin版本2.2切換到版本3.0時發生NullPointerException

Question

我正在更新我的pom.xml依賴項的版本，並且在更改hibernate3-maven-plugin的版本時遇到模糊錯誤

<plugin> 
    <!-- Run "mvn hibernate3:hbm2ddl" to generate schema --> 
    <groupId>org.codehaus.mojo</groupId> 
    <artifactId>hibernate3-maven-plugin</artifactId> 
    <version>2.2</version> 
</plugin> 

到

<plugin> 
    <!-- Run "mvn hibernate3:hbm2ddl" to generate schema --> 
    <groupId>org.codehaus.mojo</groupId> 
    <artifactId>hibernate3-maven-plugin</artifactId> 
    <version>3.0</version> 
</plugin> 

2.2版本，一切編譯成功，並

mvn hibernate3:hbm2ddl 

從註釋類創建正確的模式。

改變不外乎以下錯誤版本的結果，當我再次運行就是hbm2ddl命令：​​

[ERROR] Failed to execute goal org.codehaus.mojo:hibernate3-maven-plugin:3.0:hbm2ddl (default-cli) on project myProject: There was an error creating the AntRun task. NullPointerException -> [Help 1] 

完整的堆棧跟蹤如下：

[ERROR] Failed to execute goal org.codehaus.mojo:hibernate3-maven-plugin:3.0:hbm2ddl (default-cli) on project myProject: There was an error creating the AntRun task. NullPointerException -> [Help 1] 
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:hibernate3-maven-plugin:3.0:hbm2ddl (default-cli) on project myProject: There was an error creating the AntRun task. 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217) 
    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.buildProject(LifecycleModuleBuilder.java:84) 
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59) 
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183) 
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.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:537) 
    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(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409) 
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352) 
Caused by: org.apache.maven.plugin.MojoExecutionException: There was an error creating the AntRun task. 
    at org.codehaus.mojo.hibernate3.AbstractHibernateMojo.execute(AbstractHibernateMojo.java:84) 
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101) 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209) 
    ... 19 more 
Caused by: java.lang.NullPointerException 
    at org.codehaus.plexus.configuration.DefaultPlexusConfiguration.add(DefaultPlexusConfiguration.java:174) 
    at org.codehaus.plexus.configuration.DefaultPlexusConfiguration.addChild(DefaultPlexusConfiguration.java:150) 
    at org.codehaus.mojo.hibernate3.util.PlexusConfigurationUtils.setHibernateConfiguration(PlexusConfigurationUtils.java:289) 
    at org.codehaus.mojo.hibernate3.util.PlexusConfigurationUtils.parseHibernateTool(PlexusConfigurationUtils.java:67) 
    at org.codehaus.mojo.hibernate3.AbstractHibernateToolMojo.getConfiguration(AbstractHibernateToolMojo.java:60) 
    at org.codehaus.mojo.hibernate3.AbstractHibernateMojo.execute(AbstractHibernateMojo.java:76) 
    ... 21 more 

如果我回去版本2.2，一切工作正常。而且由於除了僅僅擁有最新的依賴關係之外，我不打算升級任何特定的原因，我暫時堅持2.2。

希望有人可以對此有所瞭解！

Answer 1

更新插件以下和它的工作：

<plugin> 
    <!-- Run "mvn hibernate3:hbm2ddl" to generate schema --> 
    <groupId>org.codehaus.mojo</groupId> 
    <artifactId>hibernate3-maven-plugin</artifactId> 
    <version>${hibernate3.maven.plugin.version}</version> 

    <configuration> 
     <hibernatetool> 
      <annotationconfiguration propertyfile="src/main/resources/${hibernate.properties}" /> 
      <hbm2ddl update="true" create="true" export="false" 
        outputfilename="${hibernate.hbm2ddl.sqlfile}" format="true" 
        console="true" /> 
     </hibernatetool> 
    </configuration> 
</plugin>