小编Ben*_*min的帖子

我定期得到错误:

错误JDBCExceptionReporter - > javax.resource.ResourceException:IJ000453:无法获取java的托管连接:jboss/datasources/myDB 08:12:05,928 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[ default-host].[/ mySoftware].[jsp]](ajp - xx.255.0.yyy-8109-21)Servlet jsp的Servlet.service()抛出异常:javax.resource.ResourceException:IJ000655:没有托管连接在org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.getConnection(SemaphoreArrayListManagedConnectionPool.java:377)等配置的阻塞超时(30000 [ms])内可用.

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所以,我有下一个数据源配置.在JBoss AS上:

<datasource jta="true" jndi-name="java:jboss/datasources/myDB" pool-name="ssbs-pssbs" enabled="true" use-ccm="true">
                    <connection-url>jdbc:postgresql://xx.255.0.yyy/myDatabase</connection-url>
                    <driver-class>org.postgresql.Driver</driver-class>
                    <driver>postgresql-jdbc4</driver>
                    <pool>
                        <min-pool-size>30</min-pool-size>
                        <max-pool-size>150</max-pool-size>
                        <prefill>true</prefill>
                        <use-strict-min>false</use-strict-min>
                        <flush-strategy>FailingConnectionOnly</flush-strategy>
                    </pool>
                    <security>
                        <user-name>tick</user-name>
                        <password>tack</password>
                    </security>
                    <validation>
                        <check-valid-connection-sql>SELECT 1</check-valid-connection-sql>
                        <validate-on-match>false</validate-on-match>
                        <background-validation>false</background-validation>
                    </validation>
                    <timeout>
                        <blocking-timeout-millis>30000</blocking-timeout-millis>
                        <idle-timeout-minutes>5</idle-timeout-minutes>
                    </timeout>
                    <statement>
                        <share-prepared-statements>false</share-prepared-statements>
                    </statement>
                </datasource>

在我的Postgres服务器上我允许500上的max_connection.为什么我得到这个例外？

我使用 Hibernate 4 和 Spring 3。

我有两个实体。

图书实体

@Entity
@Table(name = "book")
public class Book implements Serializable {

    public Book() {
    }

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue( strategy = GenerationType.IDENTITY)
    private int id;

    @ManyToOne()
    @JoinColumn( name = "author_id" )
    private Author author;

    private String name;
    private int pages;

    @Version
    @Column( name = "VERSION")
    private int version;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public Author getAuthor() { …

我是 Scala 的新手。我浏览教程并尝试创建一些有用的东西，但遇到了这样的奇怪错误：

value <> is not a member of (slick.lifted.Rep[Long], slick.lifted.Rep[String], slick.lifted.Rep[String], slick.lifted.Rep[String])

我的代码：

package models

import java.sql.Timestamp

import slick.jdbc.MySQLProfile._
import slick.jdbc.MySQLProfile.api.stringColumnType
import slick.jdbc.MySQLProfile.api.longColumnType
import slick.jdbc.MySQLProfile.api.timestampColumnType
import slick.lifted.Tag


case class User(id: Long, name: String, email: String, PMAccount: String)
class Users(tag: Tag) extends Table[User](tag, "Users") {
  def id = column[Long]("id")
  def name = column[String]("name")
  def email = column[String]("email")
  def PMAccount = column[String]("PMAccount")

  def * = (id, name, email, PMAccount) <> (User.tupled, User.unapply(_))

}

谁能帮助我理解这一点？