Karaf - Hibernate - MariaDB“无法完成模式更新”错误答案

【问题标题】：Karaf - Hibernate - MariaDB "Could not complete schema update" errorKaraf - Hibernate - MariaDB“无法完成模式更新”错误
【发布时间】：2016-02-22 13:44:20
【问题描述】：

我正在尝试使用 Karaf 4.0.4 + Hibernate 4.3.6.Final 设置项目，并且我正在使用 MariaDB 10.0.23 作为数据库。

我已经关注并尝试了this tutorial 但是：

我想使用 pax-jdbc-config 创建数据源（因为不推荐使用数据源蓝图），而不是使用数据源 blueprint.xml。
我必须使用 MariaDB，而不是 MySQL。所以我假设我必须更改一些配置文件才能使用 MariaDB 驱动程序

结果，这是我的配置：

org.ops4j.datasource-sampleprj.cfg：

osgi.jdbc.driver.name=mariadb
osgi.jdbc.driver.class=org.mariadb.jdbc.Driver
url=jdbc:mysql://DB_SERVER:3306/sampleprjdb
dataSourceName=sampleprj
databaseName=sampleprjdb
user=myuser
password=mypassword

我确定我的数据库凭据和数据库名称是正确的。

sample-prj bundle > persistence.xml：

<?xml version="1.0" encoding="UTF-8"?> 
<persistence version="2.0"
    xmlns="http://java.sun.com/xml/ns/persistence"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
    <persistence-unit name="sampleprj" transaction-type="JTA">
        <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
        <jta-data-source>
            osgi:service/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/sampleprj)      
        </jta-data-source>
        <properties>
            <property name="hibernate.dialect"     value="org.hibernate.dialect.MySQL5Dialect" />
            <property name="hibernate.hbm2ddl.auto" value="update" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.format_sql" value="true" />
        </properties>
    </persistence-unit>
</persistence>

在<jta-data-source> 元素中，我尝试了上面的值和osgi:service/sampleprj，但它们都不起作用。我也尝试过不同的hibernate.dialects，因为大多数架构更新错误都是由不正确的方言引起的。

sample-prj bundle > blueprint.xml：

<?xml version="1.0" encoding="UTF-8"?>
<blueprint default-activation="eager"
    xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:jpa="http://aries.apache.org/xmlns/jpa/v1.0.0" xmlns:tx="http://aries.apache.org/xmlns/transactions/v1.0.0"

    xsi:schemaLocation="
            http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0 
            http://www.w3.org/2001/XMLSchema-instance     http://www.w3.org/2001/XMLSchema-instance 
            http://aries.apache.org/xmlns/jpa/v1.0.0 http://aries.apache.org/xmlns/jpa/v1.0.0 
            http://aries.apache.org/xmlns/transactions/v1.0.0 http://aries.apache.org/xmlns/transactions/v1.0.0 ">

    <bean id="dbService"
        class="org.sample.project.persistence.mariadb.impl.DbServiceImpl">
        <jpa:context unitname="sampleprj" property="em"/>
        <tx:transaction method="*" value="Required" />
    </bean>

    <service ref="dbService" interface="org.sample.project.IDbService" />

</blueprint>

sample-prj 包 > pom.xml:

<project>

...

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.felix</groupId>
            <artifactId>maven-bundle-plugin</artifactId>
            <extensions>true</extensions>
            <configuration>
                <instructions>
                    <Bundle-SymbolicName>${project.artifactId}</Bundle-SymbolicName>
                    <Meta-Persistence>META-INF/persistence.xml</Meta-Persistence>
                    <Bundle-Version>1.0.0</Bundle-Version>
                    <Bundle-ManifestVersion>2</Bundle-ManifestVersion>
                    <Manifest-Version>1</Manifest-Version>
                    <Import-Package>
                    org.apache.felix.service.command;version="[0.6,1)",
                    org.apache.felix.gogo.commands;version="[0.6,1)",
                    org.apache.karaf.shell.console;version="[2.2,4)",
                    org.hibernate.proxy,
                    javassist.util.proxy,
                    *
                    </Import-Package>
                </instructions>
            </configuration>
        </plugin>
    </plugins>
</build>

...

</project>

我还可以确认生成的 Manifest.MF 包含 Meta-Persistence 属性。

在 Karaf (clean) start 上，我使用这些命令来安装依赖包：

feature:repo-add mvn:org.ops4j.pax.jdbc/pax-jdbc-features/0.5.0/xml/features
feature:install transaction jndi pax-jdbc-mariadb pax-jdbc-config pax-jdbc-pool-dbcp2 jpa hibernate

当我使用bundle:list 时，所有捆绑包似乎都已安装并且到目前为止都活动。

最后，我使用这个命令来安装我的示例包：
```
bundle:install mvn:org.sample.prj/sample-prj/1.0
```

但它会打印这些日志消息：

2016-02-22 15:38:44,035 | ERROR | pool-36-thread-1 | SchemaUpdate                     | 199 - org.jboss.logging.jboss-logging - 3.1.4.GA | HHH000299: Could not complete schema update
java.lang.NullPointerException
    at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:227)[188:org.hibernate.core:4.3.6.Final]
    at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:178)[188:org.hibernate.core:4.3.6.Final]
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:522)[188:org.hibernate.core:4.3.6.Final]
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1857)[188:org.hibernate.core:4.3.6.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)[189:org.hibernate.entitymanager:4.3.6.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843)[189:org.hibernate.entitymanager:4.3.6.Final]
    at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:398)[188:org.hibernate.core:4.3.6.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842)[189:org.hibernate.entitymanager:4.3.6.Final]
    at org.hibernate.osgi.OsgiPersistenceProvider.createContainerEntityManagerFactory(OsgiPersistenceProvider.java:112)[190:org.hibernate.osgi:4.3.6.Final]
    at org.apache.aries.jpa.container.impl.PersistenceProviderTracker.createAndCloseDummyEMF(PersistenceProviderTracker.java:105)[79:org.apache.aries.jpa.container:2.3.0]
    at org.apache.aries.jpa.container.impl.PersistenceProviderTracker.addingService(PersistenceProviderTracker.java:85)[79:org.apache.aries.jpa.container:2.3.0]
    at org.apache.aries.jpa.container.impl.PersistenceProviderTracker.addingService(PersistenceProviderTracker.java:44)[79:org.apache.aries.jpa.container:2.3.0]
    at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:941)[org.osgi.core-6.0.0.jar:]
    at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:870)[org.osgi.core-6.0.0.jar:]
    at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256)[org.osgi.core-6.0.0.jar:]
    at org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:183)[org.osgi.core-6.0.0.jar:]
    at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:318)[org.osgi.core-6.0.0.jar:]
    at org.osgi.util.tracker.ServiceTracker.open(ServiceTracker.java:261)[org.osgi.core-6.0.0.jar:]
    at org.apache.aries.jpa.container.impl.PersistenceBundleTracker.trackProvider(PersistenceBundleTracker.java:106)[79:org.apache.aries.jpa.container:2.3.0]
    at org.apache.aries.jpa.container.impl.PersistenceBundleTracker.findPersistenceUnits(PersistenceBundleTracker.java:90)[79:org.apache.aries.jpa.container:2.3.0]
    at org.apache.aries.jpa.container.impl.PersistenceBundleTracker.addingBundle(PersistenceBundleTracker.java:69)[79:org.apache.aries.jpa.container:2.3.0]
    at org.apache.aries.jpa.container.impl.PersistenceBundleTracker.addingBundle(PersistenceBundleTracker.java:40)[79:org.apache.aries.jpa.container:2.3.0]
    at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:469)[org.osgi.core-6.0.0.jar:]
    at org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:415)[org.osgi.core-6.0.0.jar:]
    at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256)[org.osgi.core-6.0.0.jar:]
    at org.osgi.util.tracker.AbstractTracked.trackInitial(AbstractTracked.java:183)[org.osgi.core-6.0.0.jar:]
    at org.osgi.util.tracker.BundleTracker.open(BundleTracker.java:156)[org.osgi.core-6.0.0.jar:]
    at org.apache.aries.jpa.container.impl.Activator.start(Activator.java:43)[79:org.apache.aries.jpa.container:2.3.0]
    at org.apache.felix.framework.util.SecureAction.startActivator(SecureAction.java:697)[org.apache.felix.framework-5.4.0.jar:]
    at org.apache.felix.framework.Felix.activateBundle(Felix.java:2226)[org.apache.felix.framework-5.4.0.jar:]
    at org.apache.felix.framework.Felix.startBundle(Felix.java:2144)[org.apache.felix.framework-5.4.0.jar:]
    at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:998)[org.apache.felix.framework-5.4.0.jar:]
    at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:984)[org.apache.felix.framework-5.4.0.jar:]
    at org.apache.karaf.features.internal.service.FeaturesServiceImpl.startBundle(FeaturesServiceImpl.java:1199)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:840)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1089)[9:org.apache.karaf.features.core:4.0.4]
    at org.apache.karaf.features.internal.service.FeaturesServiceImpl$1.call(FeaturesServiceImpl.java:985)[9:org.apache.karaf.features.core:4.0.4]
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)[:1.7.0_45]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)[:1.7.0_45]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)[:1.7.0_45]
    at java.lang.Thread.run(Thread.java:744)[:1.7.0_45]

我怀疑这里有一些缺失或错误的配置。我错过了什么？

谢谢，埃姆雷。

【问题讨论】：

标签： hibernate jpa mariadb apache-karaf karaf

【解决方案1】：

这可能是 Aries JPA 2 中的一个问题。Charlie Mordant 今天刚刚给我写了一封邮件，其中包含他对 Aries JPA 2 所做的一些测试的结果。他提到了 hibernate 的类似行为，如果他还希望架构由持久性提供程序。

本教程的主要区别可能是本教程使用了不需要凭据即可登录的嵌入式。我将尝试在 Aries JPA 的测试中重现该问题。您可以在Apache Aries Jira 中为此提出问题吗？

【讨论】：