Java Datanucleus在GAE中使用Maven增强，构建失败

我提到的这篇文章定义了如何增强DataNucleus的类。我正试图用Maven做同样的事情，但是不断地出现构建失败

DataNucleus Enhancer (version 3.2.7) for API "JPA" using JRE "1.7"
DataNucleus Enhancer : Classpath
>>  E:\DevTools\apache-maven-3.1.0\bin\..\boot\plexus-classworlds-2.4.2.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.262s
[INFO] Finished at: Fri Sep 27 22:41:16 IST 2013
[INFO] Final Memory: 17M/227M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.datanucleus:datanucleus-maven-plugin:3.2.0-m2:enhance (default) on project rho_v1.0: Error executing DataNucleus tool org.datanucleus.en
hancer.DataNucleusEnhancer: InvocationTargetException: org.datanucleus.metadata.AbstractMemberMetaData.setPersistenceModifier(Ljava/lang/String;)V -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

我的POM文件如下所示

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>

    <groupId>com.sis.rho</groupId>
    <artifactId>rho_v1.0</artifactId>

    <properties>
        <appengine.app.version>1</appengine.app.version>
        <appengine.target.version>1.8.3</appengine.target.version>
        <datanucleus-core.version>3.2.7</datanucleus-core.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <!-- Compile/runtime dependencies -->
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-1.0-sdk</artifactId>
            <version>${appengine.target.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- Test Dependencies -->
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-testing</artifactId>
            <version>${appengine.target.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-stubs</artifactId>
            <version>${appengine.target.version}</version>
            <scope>test</scope>
        </dependency>
        <!-- Struts 2 -->
        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-core</artifactId>
            <version>2.1.8</version>
        </dependency>

        <!-- Spring framework --> 
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring</artifactId>
            <version>2.5.6</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>2.5.6</version>
        </dependency>

        <!-- Struts 2 + Spring plugins -->
        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-spring-plugin</artifactId>
            <version>2.1.8</version>
        </dependency>

        <!-- Javax persistence -->
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-core</artifactId>
            <version>${datanucleus-core.version}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-enhancer</artifactId>
            <version>3.1.0-release</version>
        </dependency>
        <dependency>
            <groupId>org.apache.geronimo.specs</groupId>
            <artifactId>geronimo-jpa_2.0_spec</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>org.datanucleus</groupId>
            <artifactId>datanucleus-api-jpa</artifactId>
            <version>3.1.1</version>
        </dependency>
        <dependency>
            <groupId>com.google.appengine.orm</groupId>
            <artifactId>datanucleus-appengine</artifactId>
            <version>2.1.1</version>
        </dependency>

        <!-- for log4J -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.6.1</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>1.6.1</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.6.1</version>
        </dependency>

        <!-- struts 2 velocity dependency -->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity</artifactId>
            <version>1.6.2</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <version>2.5.1</version>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <archiveClasses>true</archiveClasses>
                    <webResources>
                        <!-- in order to interpolate version from pom into appengine-web.xml -->
                        <resource>
                            <directory>${basedir}/src/main/webapp/WEB-INF</directory>
                            <filtering>true</filtering>
                            <targetPath>WEB-INF</targetPath>
                        </resource>
                    </webResources>
                </configuration>
            </plugin>

            <plugin>
                <groupId>com.google.appengine</groupId>
                <artifactId>appengine-maven-plugin</artifactId>
                <version>${appengine.target.version}</version>
                <configuration>
                    <enableJarClasses>false</enableJarClasses>
                    <jvmFlags>
                        <jvmFlag>-Xdebug</jvmFlag>
                        <jvmFlag>-Xrunjdwp:transport=dt_socket,address=8080,server=y,suspend=y</jvmFlag>
                    </jvmFlags>
                    <disableUpdateCheck>true</disableUpdateCheck>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.datanucleus</groupId>
                <artifactId>datanucleus-maven-plugin</artifactId>
                <version>3.2.0-m2</version>
                <configuration>
                    <api>JPA</api>
                    <fork>false</fork>
                    <persistenceUnitName>transactions-optional</persistenceUnitName>
                    <verbose>true</verbose>
                </configuration>
                <executions>
                    <execution>
                        <phase>process-classes</phase>
                        <goals>
                            <goal>enhance</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

4.0.0
战争
1.0-快照
com.sis.rho
rho_v1.0
1.
1.8.3
3.2.7
UTF-8
com.google.appengine
appengine-api-1.0-sdk
${appengine.target.version}
javax.servlet
servlet api
2.5
假如
jstl
jstl
1.2
com.google.appengine
阿彭金试验
${appengine.target.version}
测试
com.google.appengine
appengine api存根
${appengine.target.version}
测试
org.apache.struts
struts2型芯
2.1.8
org.springframework
春天
2.5.6
org.springframework
弹簧网
2.5.6
org.apache.struts
struts2弹簧插件
2.1.8
org.datanucleus
数据核核心
${datanucleus core.version}
运行时
org.datanucleus
数据核增强子
3.1.0-发布
org.apache.geronimo.specs
geronimo-jpa_2.0_规范
1.1
org.datanucleus
datanucleus api jpa
3.1.1
com.google.appengine.orm
datanucleus appengine
2.1.1
org.slf4j
slf4j api
1.6.1
org.slf4j
jcl-over-slf4j
1.6.1
org.slf4j
slf4j-log4j12
1.6.1
org.apache.velocity
速度
1.6.2
org.apache.maven.plugins
2.5.1
maven编译器插件
1.6
1.6
org.apache.maven.plugins
maven战争插件
2.3
真的
${basedir}/src/main/webapp/WEB-INF
真的
WEB-INF
com.google.appengine
appengine maven插件
${appengine.target.version}
假的
-Xdebug
-Xrunjdwp:transport=dt_套接字，地址=8080，服务器=y，挂起=y
真的
org.datanucleus
datanucleus maven插件
3.2.0-m2
JPA
假的
交易可选
真的
进程类
增强

---

谁能帮我理解这个错误意味着什么以及如何避免这个错误。非常感谢您的帮助。

从什么时候开始，GAE就支持DN 3.2.x了

GAE从什么时候开始支持DN 3.2.x

JPA也需要增强吗？当我不添加datanucleus maven插件进行增强时，我的构建成功，但在创建

EntityManagerFactory

“找到com.sis.rho.LoginBean类的元数据，但该类未增强！！”使用（datanucleus）的不一致版本罐子，这就是你想要的get@DataNucleus你刚才说的话，我已经很难听懂了。您只能想象我在试图找出问题所在时所经历的痛苦，最终发现我正在旧的datanucleus版本上部署。你不认为这个错误信息需要更具体一些吗？您将挽救数年的生命：）“此错误消息”来自编译器/运行时。您认为DataNucleus是如何参与到这个过程中的？我们发布了一致JAR的ZIP，因此实际使用它们取决于用户。JPA也需要增强吗？当我没有添加datanucleus maven插件进行增强时，我的构建成功了，但在创建

EntityManagerFactory

“找到了com.sis.rho.LoginBean类的元数据，但该类没有增强！！”使用不一致版本的（datanucleus）JAR，这就是您需要的get@DataNucleus你刚才说的话，我已经很难听懂了。您只能想象我在试图找出问题所在时所经历的痛苦，最终发现我正在旧的datanucleus版本上部署。你不认为这个错误信息需要更具体一些吗？您将挽救数年的生命：）“此错误消息”来自编译器/运行时。您认为DataNucleus是如何参与到这个过程中的？我们发布了一致JAR的ZIP，因此实际使用这些JAR取决于用户。感谢将maven datanucleus插件版本更改为3.1.3:）感谢将maven datanucleus插件版本更改为3.1.3:）后工作正常