早晨,开发扔过来一个问题,截图如下: ums already has more than 'max_user_connections' active connections 查看数据库发现: 最大连接数为100,最大用户连接数为30. 而数据库里,此用户的最大连接数确实达到了阈值 30 设置:set global max_user_connections=90; 应用连接数突增到90.怀疑是应用的连接数设置得过大. 建议开发根据实际情况修改连接配置(左边的是原始值,右边的是修改后的值)如下: 连…
终于解决了Linux下运行OCCI程序一直报Error while trying to retrieve text for error ORA-01804错误 http://blog.csdn.net/zklth/article/details/7184032 Linux下 和 Windows 下 Oracle Instant Client 的安装. http://fableking.iteye.com/blog/2115724 http://download.csdn.net/download…
ubuntu 14.04 强制重启后出现不能上网,点击connection information 后出现error: no valid active connections found 解决办法是在终端输入: sudo gedit /etc/network/interfaces 然后替换interfaces所有内容为: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback 然后重启,就…
Spark程序编译报错: [INFO] Compiling 2 source files to E:\Develop\IDEAWorkspace\spark\target\classes at 1567004370534[ERROR] E:\Develop\IDEAWorkspace\spark\src\main\scala\cn\itcast\wordCount\WordCount.scala:3: error: object apache is not a member of package…
运行netcore2.2程序是报错 C:\myself\WuZhui\WuZhui\bin\Release\netcoreapp2.2>dotnet WuZhui.DLLError: An assembly specified in the application dependencies manifest (WuZhui.deps.json) has already been found but with a different file extension: package: 'WuZhui…
需求:1.点击“关闭”按钮时,程序最小化到托盘,并没有退出,这时再次运行程序,不会重复运行,而是显示已运行的程序:2.支持不同目录:3.支持修改名称. 代码(不支持修改名称,不支持不同目录): using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Windows.Forms; using Tool; using Syst…
在创建自定义的Mapper时候,编译正确,但上传到集群执行时出现错误: 11/16/05 22:53:16 INFO mapred.JobClient: Task Id : attempt_201111301626_0015_m_000000_0, Status : FAILED java.lang.RuntimeException: java.lang.ClassNotFoundException: actiondemo.MyJob$MapClass at org.apache.Hadoop.…
wepy开发小程序使用getApp().globalData保存全局数据很方便,但是会在控制台看到很多报错:“error 'getApp' is not defined no-undef”,这是eslint报错. 解决办法:在.eslintrc.js文件中加入 globals: { getApp: true }…
问题描述: 今天一个同事反映程序有问题,让帮忙查看后台日志,发现后台日志报错的信息如下: java.net.SocketException: Too many open files at java.net.Socket.createImpl(Socket.java:460) at java.net.Socket.connect(Socket.java:587) at org.apache.commons.net.SocketClient.connect(SocketClient.java:163…
报错1 java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries. 解决办法 下载winutils.exe文件,将其放到hadoop目录hadoop-2.6.0\bin下 然后配置HADOOP_HOME和并配置path就可以了,比如我的是: HADOOP_HOME为 D:\bigdata_software\hadoop-2.6.0 path为 HADOOP_HOME\…
1: //在写一些服务型的软件的时候,你可能不希望一个操作系统里有两个副本在运行,这样也许会扰乱你的操作.这时,你就需要限制程序的副本.下面的这个方法,很简单的就可以实现上述功能. using System; using System.Collections.Generic; using System.Windows.Forms; using System.Diagnostics; namespace TestProcessCount { static class Program { /// <…
1.PostgreSQL 9.1 and below: SELECT pg_terminate_backend(pg_stat_activity.procpid) FROM pg_stat_activity WHERE pg_stat_activity.datname = 'TARGET_DB' AND procpid <> pg_backend_pid(); PostgreSQL 9.2 and above: SELECT pg_terminate_backend(pg_stat_activ…
一.异常{ ORA-12505, TNS:listener does not currently know of SID given in connect descriptor The Connection descriptor used by the client was: 10.190.121.95:1521:sxzhdb } 二.查询{ ORA-12505:TNS: 监听程序当前无法识别连接描述符中所给出的 SID --- SID:是一个数据库的唯一标识符!是建立一个数据库时系统自动赋…
