Wildfly 8.2.0.Final:由于示例数据源或 persistence.xml 导致配置错误?

Wildfly 8.2.0.Final: Misconfiguration because of example datasource or persistence.xml?

我在 persistence.xml:

中配置了三个数据源
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
    version="2.1">

    <persistence-unit name="MyPersistenceUnit" transaction-type="JTA">
        <jta-data-source>java:jboss/datasources/myDS</jta-data-source>
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
            <property name="hibernate.connection.useUnicode" value="true" />
            <property name="hibernate.connection.characterEncoding" value="UTF-8" />
            <property name="hibernate.connection.charSet" value="UTF-8" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.hbm2ddl.auto" value="validate" />
        </properties>
    </persistence-unit>

    <persistence-unit name="MyPersistenceTestUnit" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
            <property name="hibernate.connection.useUnicode" value="true" />
            <property name="hibernate.connection.characterEncoding" value="UTF-8" />
            <property name="hibernate.connection.charSet" value="UTF-8" />
            <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/mydb" />
            <property name="hibernate.connection.username" value="myuser" />
            <property name="hibernate.connection.password" value="mypass" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.hbm2ddl.auto" value="validate" />
        </properties>
    </persistence-unit>

    <persistence-unit name="MyLoggingUnit" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
            <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
            <property name="hibernate.connection.useUnicode" value="true" />
            <property name="hibernate.connection.characterEncoding" value="UTF-8" />
            <property name="hibernate.connection.charSet" value="UTF-8" />
            <property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/mydb" />
            <property name="hibernate.connection.username" value="myuser" />
            <property name="hibernate.connection.password" value="mypass" />
            <property name="hibernate.show_sql" value="true" />
            <property name="hibernate.hbm2ddl.auto" value="validate" />
        </properties>
    </persistence-unit>

</persistence>

首先是'default'单元。它由标准实体管理器使用。 Java EE 环境之外的 运行 JUnit 测试需要第二个。第三个用于独立于 JTA 事务的日志记录。
这行得通。但是当我启动 Wildfly 时,我什至会遇到其中一些错误(尽管我在我的应用程序中没有使用 H2):

21:32:33,748 ERROR [org.hibernate.tool.hbm2ddl.SchemaValidator] (ServerService Thread Pool -- 51) HHH000319: Could not get database metadata: org.h2.jdbc.JdbcSQLException: Table "PG_CLASS" not found; SQL statement:
select relname from pg_class where relkind='S' [42102-173]
    at org.h2.message.DbException.getJdbcSQLException(DbException.java:331)

仅在部署应用程序时发生。

我的想法是通过管理控制台或在 standalone.xml 中禁用或删除 ExampleDS,但是当我这样做时,我启动时出现错误:

21:36:20,992 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) JBAS014613: Operation ("deploy") failed - address: ([("deployment" => "com.zonacroft.mycuisine.webserver-TRUNK.war")]) - failure description: {"JBAS014771: Services with missing/unavailable dependencies" => [
    "jboss.persistenceunit.\"com.mydomain.myapp.webserver-TRUNK.war#MyLoggingUnit\".__FIRST_PHASE__ is missing [jboss.data-source.java:jboss/datasources/ExampleDS]",
    "jboss.persistenceunit.\"com.mydomain.myapp.webserver-TRUNK.war#MyPersistenceTestUnit\".__FIRST_PHASE__ is missing [jboss.data-source.java:jboss/datasources/ExampleDS]"

这到底是怎么回事?为什么这个 persistence.xml 需要 exampleDS? RESOURCE_LOCAL 持久性单元是否配置错误? (但如果是这样,那他们为什么要工作)。那么这里的问题是什么?

[更新]
我发现当我从 RESOURCE_LOCAL 持久性单元中删除 hibernate.hbm2ddl.auto 属性时,我没有收到启动错误(启用了 exampleDS)。但令我恼火的是,我必须让 Wildfly 的 exampleDS 启用。否则 Wildfly 不会像上面描述的那样从应用程序开始。为什么会这样。这里出了什么问题?

您只为第一个持久化单元定义了一个数据源:

<jta-data-source>java:jboss/datasources/myDS</jta-data-source>

这意味着 WildFly 为您的其他持久性单元使用默认数据源 exampleDS

这会导致异常,因为配置的 PostgreSQL 方言不适用于默认的 H2 数据源。