liquibase-maven-plugin liquibase:diff - 不工作（在类路径中找不到任何 META-INF/persistence.xml 文件）答案

【问题标题】：liquibase-maven-plugin liquibase:diff - Not working (Could not find any META-INF/persistence.xml file in the classpath)liquibase-maven-plugin liquibase:diff - 不工作（在类路径中找不到任何 META-INF/persistence.xml 文件）
【发布时间】：2014-09-22 12:20:41
【问题描述】：

我很难通过 liquibase-maven-plugin 运行 liquibase:diff

我有一个使用 spring-boot 引导的基于 Spring Data JPA 的应用程序。所以，不会有任何persistence.xml

这是来自 pom.xml 的 sn-p：

<plugin>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-maven-plugin</artifactId>
<version>3.2.2</version>
<configuration>
    <propertyFile>target/classes/liquibase.properties</propertyFile>
</configuration>
<dependencies>
    <dependency>
    <groupId>org.liquibase.ext</groupId>
    <artifactId>liquibase-hibernate4</artifactId>
    <version>${liquibase_hibernate_version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>${spring.version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>${spring.version}</version>
    </dependency>
    <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>${mysql.version}</version>
    </dependency>
    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>${spring.version}</version>
    </dependency>
    <dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>${hibernate.version}</version>
    </dependency>
    <dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>${hibernate-entitymanager.version}</version>
    </dependency>
</dependencies>

这是 liquibase.properties：

changeLogFile: classpath:/db/changelog/changelog-master.xml
diffChangeLogFile: src/main/resources/db/changelog/changelog-sql-2_0.sql
driver: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/sample
defaultSchema: sample
username: root
password: root
referenceUrl: hibernate:spring:se.sample.core.domain?dialect=org.hibernate.dialect.MySQL5Dialect
verbose: true
dropFirst: false
logging: debug

这是我正在使用的 maven 命令：

mvn resources:resources liquibase:diff -Pprod

这是我得到的错误：

[INFO] Executing on Database: jdbc:mysql://localhost:3306/sample
INFO 7/30/14 2:47 PM: liquibase-hibernate: Reading hibernate configuration hibernate:spring:se.sample.core.domain?dialect=org.hibernate.dialect.MySQL5Dialect
INFO 7/30/14 2:47 PM: liquibase-hibernate: Found package se.sample.core.domain
INFO 7/30/14 2:47 PM: liquibase-hibernate: Found dialect org.hibernate.dialect.MySQL5Dialect
Jul 30, 2014 2:47:21 PM org.hibernate.jpa.boot.internal.PersistenceXmlParser doResolve
**INFO: HHH000318: Could not find any META-INF/persistence.xml file in the classpath**
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.095s
[INFO] Finished at: Wed Jul 30 19:38:38 CEST 2014
[INFO] Final Memory: 18M/310M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.liquibase:liquibase-maven-plugin:3.2.2:diff (default-cli) on project fmu-core: Error setting up or running Liquibase: java.lang.NullPointerException -> [Help 1]
[ERROR]

由于我使用的是没有任何 persistence.xml 的 Spring JPA，所以我无法理解如何使其工作。

谁能指导一下？

更新 1

在 maven 命令中添加了 -X 以获得完整的详细信息：

INFO: HHH000318: Could not find any META-INF/persistence.xml file in the classpath
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.192s
[INFO] Finished at: Wed Jul 30 20:20:24 CEST 2014
[INFO] Final Memory: 21M/433M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.liquibase:liquibase-maven-plugin:3.2.2:diff (default-cli) on project fmu-core: Error setting up or running Liquibase: java.lang.NullPointerException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.liquibase:liquibase-maven-plugin:3.2.2:diff (default-cli) on project fmu-core: Error setting up or running Liquibase: java.lang.NullPointerException
    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:320)
    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:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    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: Error setting up or running Liquibase: java.lang.NullPointerException
    at org.liquibase.maven.plugins.AbstractLiquibaseMojo.execute(AbstractLiquibaseMojo.java:371)
    at org.liquibase.maven.plugins.LiquibaseDatabaseDiff.execute(LiquibaseDatabaseDiff.java:129)
    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: liquibase.exception.DatabaseException: java.lang.NullPointerException
    at liquibase.integration.commandline.CommandLineUtils.createDatabaseObject(CommandLineUtils.java:53)
    at org.liquibase.maven.plugins.LiquibaseDatabaseDiff.performLiquibaseTask(LiquibaseDatabaseDiff.java:144)
    at org.liquibase.maven.plugins.AbstractLiquibaseMojo.execute(AbstractLiquibaseMojo.java:367)
    ... 22 more
Caused by: java.lang.NullPointerException
    at liquibase.ext.hibernate.database.HibernateSpringDatabase.buildConfigurationFromScanning(HibernateSpringDatabase.java:237)
    at liquibase.ext.hibernate.database.HibernateSpringDatabase.buildConfiguration(HibernateSpringDatabase.java:56)
    at liquibase.ext.hibernate.database.HibernateDatabase.setConnection(HibernateDatabase.java:42)
    at liquibase.database.DatabaseFactory.findCorrectDatabaseImplementation(DatabaseFactory.java:123)
    at liquibase.database.DatabaseFactory.openDatabase(DatabaseFactory.java:141)
    at liquibase.integration.commandline.CommandLineUtils.createDatabaseObject(CommandLineUtils.java:44)
    ... 24 more

【问题讨论】：

你能做两件事 - 在 mvn 命令中添加 -X 以使其记录更详细的信息，并将 logLevel=DEBUG 添加到 liquibase.properties 文件并重新运行它吗？从输出中不清楚“缺少”persistence.xml 文件是问题所在。
感谢您的提示。我添加了完整的异常详细信息。但我仍然无法弄清楚是什么问题。
看起来是 liquibase-hibernate 库的问题。您正在运行最新版本的 Liquibase 和 liquibase-hibernate？

标签： spring hibernate maven jpa liquibase

【解决方案1】：

为什么你认为这应该有效？

如果 Spring Data 通过支持没有 META-INF/persistence.xml 的持久性单元以不合规的方式扩展 JPA 规范，为什么 Liquibase 或任何其他合规的应用程序也要这样做？

【讨论】：

因为liquibase-hibernate4 文档说它可以

【解决方案2】：

我不确定您的配置有什么问题，可能是该版本中的错误或其他问题。所以我正在分享我刚开始工作的那个。你可以找到full source here，但下面应该是相关的细节。

这是我的liquibase.properties

referenceUrl=hibernate:spring:com.xenoterracide?dialect=org.hibernate.dialect.H2Dialect
changeLogFile: classpath:changelog.db-master.xml
diffChangeLogFile: changelog.xml
driver: org.h2.Driver
url: jdbc:h2:mem:testdb;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
username: sa
password:
verbose: true
logging: debug

以及我的 pom.xml 中的插件配置（版本来自 spring platform-bom）

<build>
<plugins>
  <plugin>
    <groupId>org.liquibase</groupId>
    <artifactId>liquibase-maven-plugin</artifactId>
    <version>${liquibase.version}</version>
    <configuration>
      <propertyFile>liquibase.properties</propertyFile>
    </configuration>
     <dependencies>
      <dependency> <!-- optional but may use different version of hibernate than you do if not specified -->
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>${hibernate.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.liquibase.ext</groupId>
        <artifactId>liquibase-hibernate4</artifactId>
        <version>3.5</version>
      </dependency>
    </dependencies>
  </plugin>
</plugins>
</build>

【讨论】：