假设以下琐碎类:
package Sample;
public class Status {
private Long id;
private String status;
public Status() {}
public Status(String status) {
this.status = status;
}
public Long getId() {
return id;
}
public
我在分布式系统工作,多个服务器与前端MySQL数据库一起工作,并在不同的查询中复制数据库。一些服务器使用高达1000个连接(700 - 800,在困难时期使用900个连接)。
我周期性地遇到MySQL关闭连接的问题,并且看到已经很无聊的异常:
The last packet sent successfully to the server was 65,179,696 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either
我在mysql数据库中使用Liferay框架,并且一直收到以下错误:
ERROR [http-bio-80-exec-5][render_portlet_jsp:157] com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'odlukaKomentar' at row 1
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4118)
at com.mysql.jdbc.MysqlIO.checkE
我的Java应用程序使用Hibernate,由Tomcat 6.0托管,在长时间不活动后,它在尝试访问数据库时得到以下异常:
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.io.EOFException
STACKTRACE:
java.io.EOFException
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.jav
persistenceUnit/Hibernate
Connection to persistenceUnit/Hibernate failed
Could not create connection to database server. Attempted reconnect 3 times
我有这个错误,当我转到jpa控制台并运行命令时,我得到如下信息:
access denied for user 'root'@'localhost' (using password: YES)
尽管如此,我仍然可以在intellij中
我在Xubuntu15.04中安装了MySQL,它安装在VMware中。
这是MySQL的详细内容:
mysql Ver 14.14 Distrib 5.6.24, for debian-linux-gnu (i686) using EditLine wrapper
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other na
您好,我的连接有问题。我想知道为什么它不起作用,如果有任何帮助,我将不胜感激。 数据库类型为MYSQL,位于docker容器中。 这是我的英特尔连接设置屏幕截图inteliJ connection settings with problem in screenshot 这是我的application.properties文件 spring.datasource.url=jdbc:mysql://192.168.99.100/registr
spring.datasource.username=root
spring.datasource.password=heslo
spring.dat
这是我的实体
@Entity
public class User {
@Id
private int id;
private String name;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {