解决方法一：

[oracle@data ~]$ sqlplus / as sysdba——连接到数据库

SQL*Plus: Release 11.2.0.4.0 Production on Mon May 8 16:37:56 2017

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> select count(*) from v$process;——当前连接数

COUNT(*)

----------

128

SQL> select value from v$parameter where name = 'processes';——最大连接数

VALUE

--------------------------------------------------------------------------------

1000

如果最大连接数小鱼当前连接数的话，那么修改最大连接数。

alter system set processes = 300 scope = spfile;

修改后重启数据库

shutdown immediate;

startup;

exit退出

方法二：

修改配置文件中checkoutTime

报错： Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: An attempt by a client to checkout a Connection has timed out. 数据库连接超时的更多相关文章

  1. Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: Connectio

    严重: StandardWrapper.Throwableorg.springframework.transaction.CannotCreateTransactionException: Could ...

  2. log报错： Caused by: java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.

    报错: 解决方式: 1.登录数据库查看错误原因 结果发现账号无法正常登录出现账号被锁定的错误. 2.如何账号解锁? 用sys系统管理员账号登录数据库 SQL> alter user 用户名 ac ...

  3. ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: An attempt by a client to chec

    数据库连接超时,是数据库连接时的相关配置写错,例如:数据库密码,驱动等问题

  4. mysql数据库连接出问题，提示超时 java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.解决办法

    mysql数据库连接出问题,提示超时,后来发现问题在于连接mysql数据库的jar包跟数据库版本不对应导致的,更换jar包一致就解决了.

  5. Could not open JDBC Connection for transaction; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Could not create connection to database server.

    报错信息:Could not open JDBC Connection for transaction; nested exception is org.apache.commons.dbcp.SQL ...

  6. Could not get JDBC Connection; nested exception is java.sql.SQLException: ${jdbc.driver}

    在一个SSM分布式项目中一个服务报错: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnec ...

  7. 启动Spring boot报错：nested exception is java.sql.SQLException: Field 'id' doesn't have a default value

    先看具体日志: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with n ...

  8. 2016.11.10 Could not get JDBC Connection; nested exception is java.sql.SQLException: No suitable driver

    运行项目rds_web时,出现错误提示:Could not get JDBC Connection; nested exception is java.sql.SQLException: No sui ...

  9. Springboot 上传报错： Failed to parse multipart servlet request; nested exception is java.lang.IllegalStateException: The multi-part request contained parameter data (excluding uploaded files) that exceede

    Failed to parse multipart servlet request; nested exception is java.lang.IllegalStateException: The ...

随机推荐

  1. 解决windows7系统的快捷方式无法添加到任务栏

    #以下4条,进入cmd命令界面下逐个执行cmd /k reg add "HKEY_CLASSES_ROOT\lnkfile" /v IsShortcut /fcmd /k reg ...

  2. Java栈，PC寄存器，本地方法栈，堆，方法区（静态区）和运行常量池

    详情参考:https://my.oschina.net/wangsifangyuan/blog/711329 前言:当要判断一个变量存在什么空间上哪儿时,先分析它是哪一种(是实例变量还是局部变量),实 ...

  3. JW Player 6.7（网页视频播放器，可在手机中播放），自定义Logo和右键菜单链接，支持MP3、MP4、FLV等格式，支持通过HTML5、FLash播放

    原版下载地址:http://www.jwplayer.com/ JW Player是世界上最流行的网页影音播放器,支持的视频格式主要有:MP4.FLV.F4V等格式,支持的音频格式主要有:MP3.AA ...

  4. CentOS 7 防火墙 出现Failed to start iptables.service: Unit iptables.service failed to load

    错误信息如下: [root]# service iptables start Redirecting to /bin/systemctl start iptables.service Failed t ...

  5. 问题006：为什么用java.exe执行编译的类文件的时候，不这样写java Welcome.class

    为什么用java.exe执行编译的类文件的时候,不这样写java Welcome.class 是因为java虚拟机调用Welcome的时候,已经替我们增减了.class,如果你还要写java Welc ...

  6. SpringBoot之自动配置原理

    我在前面的Helloworld的程序中已经分析过一次,配置原理了: 1).SpringBoot启动的时候加载主配置类,开启了自动配置功能 @EnableAutoConfiguration 2).@En ...

  7. django+xadmin在线教育平台（五）

    3-3 django orm介绍与model设计 上节教程完成后代码(来学习本节前置条件): 对应commit: 留言板前端页面展示.本次内容截止教程3-2结束. 可能现在你还在通过手写sql语句来操 ...

  8. Mysql数据库的权限、索引基本操作

    数据库的关闭方法: .优雅的关闭数据库的方法: mysqladmin -uroot -p123456 shutdown .脚本关闭: /etc/init.d/mysqld stop .使用kill信号 ...

  9. vue插件库

    各种vue插件,各种有,总有一款适合你! github地址:https://github.com/opendigg/awesome-github-vue

  10. 【java】A local class access to local variables

    内部类参考 A local class has access to local variables. However, a local class can only access local vari ...