我已经用NetBeans 11.2创建了一个Web应用程序。这个IDE可以自动从DB表生成java类。我尝试使用这个特性，并从我的数据库的表CLIENTS中得到了文件Clients.java、ClientsController.java和ClientsFacade.java，该数据库运行在本地PostgreSQL服务器上。这些java文件用于向表中添加记录、从表中删除记录、列出记录等。我知道了，没关系。
ClientsFacade.java看起来像这样：

package com.simplebank.web;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

@Stateless
public class ClientsFacade extends AbstractFacade<Clients> {

    @PersistenceContext(unitName = "my_persistence_unit")
    private EntityManager em;

    @Override
    protected EntityManager getEntityManager() {
        return em;
    }

    public ClientsFacade() {
        super(Clients.class);
    }

}

据我所知，参数"my_persistence_unit"指向某个JDBC连接。我在我的项目中找到了persistence.xml文件，其中也提到了此参数，并编辑了它：

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.2" xmlns="http://java.sun.com/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_2.xsd">
  <!-- Define Persistence Unit -->
  <persistence-unit name="my_persistence_unit">
    <class>com.simplebank.web.Accounts</class>
    <class>com.simplebank.web.Clients</class>
    <properties>
      <property name="javax.persistence.jdbc.url" value="jdbc:postgresql://localhost:5432/student"/>
      <property name="javax.persistence.jdbc.user" value="student"/>
      <property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver"/>
      <property name="javax.persistence.jdbc.password" value="some-password"/>
    </properties>
  </persistence-unit>
</persistence>

JDBC-connection的所有参数都是正确的，我保证这一点。但是在构建项目之后，我尝试在GlassFish服务器中打开facelet clients/List.xhtml，并收到错误消息：

javax.ejb.EJBException
    at com.sun.ejb.containers.EJBContainerTransactionManager.processSystemException(EJBContainerTransactionManager.java:728)
    at com.sun.ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:678)
    at com.sun.ejb.containers.EJBContainerTransactionManager.postInvokeTx(EJBContainerTransactionManager.java:483)
    at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4576)
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2084)

...

Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.7.4.v20190115-ad5b7c6b2a): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLSyntaxErrorException: Schema 'STUDENT' does not exist
Error Code: 30000
Call: SELECT id AS a1, family AS a2, name AS a3, pass_number AS a4, pass_series AS a5 FROM clients OFFSET ? ROWS FETCH NEXT ? ROWS ONLY 
    bind => [2 parameters bound]
Query: ReadAllQuery(referenceClass=Clients sql="SELECT id AS a1, family AS a2, name AS a3, pass_number AS a4, pass_series AS a5 FROM clients OFFSET ? ROWS FETCH NEXT ? ROWS ONLY ")
    at org.eclipse.persistence.internal.jpa.QueryImpl.getDetailedException(QueryImpl.java:391)
    at org.eclipse.persistence.internal.jpa.QueryImpl.executeReadQuery(QueryImpl.java:264)
    at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:482)
    at com.simplebank.www.AbstractFacade.findRange(AbstractFacade.java:53)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

...

再来一次：模式STUDENT确实（！）存在。我可以使用psql实用程序（PGPASSWORD="blah-blah" psql -U student）查看它和其中的所有表。此外，我还编写了简单的java程序，它使用传统方式（JDBC驱动程序）连接到DB，并且运行良好。此外，当GlassFish服务器启动时，我在调试区域中看到以下行：

" EclipseLink, version: Eclipse Persistence Services - 2.7.4.v20190115-ad5b7c6b2a|#]
  /file:/home/3f-lab/_ide/NETBEANS/web/target/web-1.0/WEB-INF/classes/_my_persistence_unit login successful|#]"

但是facelet不起作用。请解释我做错了什么。