system service exception

Control of system Services1.systemdSystem initialization program, the first process that the system starts, the PID is 12.systemctl command650) this.width=650; "src=" Https://s4.51cto.com/wyfs02/M01/9C/9E/wKioL1lzTYGDJtLKAADgtFoHNGc088.png "title=" Screenshot from 2017-07-22 21-04-27.png "alt=" Wkiol1lztygdjtlkaadgtfohngc088.png "/>Systemctl list-units List The status of the current

Situation: Is this, the previous time to do a custom Popupwindow, is to write a class, and then inherit Popupwindow, nothing else, but at the time of instantiation, in the 2.3 system directly to the null pointer exception (4.0 and above the system running is good. ）。Workaround:1. If your custom class is an argument-free constructor, you need to write it in the co

Exception details: system. invalidoperationexception: executereader requires an enabled and available connection. The current status of the connection is closed. Source error: Line 232: mycommand. commandtype = commandtype. text;Line 233: sqldatareader DR = NULL;Row 234: DR = mycommand. executereader (commandbehavior. closeconnection );//???????????????????????Row 235:Row 236: return Dr; Source File: C:/ine

system.configuration.configurationmanager.appsettings["User"];" configuration system failed to initialize" error occurredWorkaround:If the configuration file contains a configsections element, the configsections element must be the first child element of the configuration element. ", after placing the appsettings in configsections, it is normal.It's a question of calling log4net and messing up the app. config order.　　App. Config "configuration

Php PHP website Access exception, the server in the client room, normal operation, but the customer there is no normal operating system, normal access to the system!1. After the Excel upload operation, the file has been uploaded successfully, and saved to the database, the process takes a long time, 2-3 minutes, but the page does not jump successfully, white

C ++ in vs2005CodeWhen calling the COM component (the DLL file has been added through "Project-> reference"), the following error occurs: An unhandled "system. runtime. interopservices. comexception" exception occurs in comlayout.exe. Other information: failed to retrieve components whose CLSID is {0ec8ccc8-ebed-495e-9a9f-313da4ec0dfa} in the com class factory because of the following error: 80040154. "

Message 6522, level 16, status 1, process insertcurrency_string, row 0thThe. NET Framework error occurs when you execute a user-defined routine or aggregate "insertcurrency_string:System. Exception: attempts to perform operations prohibited by the CLR host.System. Exception:In sqlserverclrcallnet. clrfunction. callsapfunupdatedatavb (string strfunname, listdictionary strargs, listdictionary strtableargs, listdictionary strrettabs, listdictionary strr

A Problem description1. Open vs2013, select "File | new | project" and the following dialog box appears.2. Click "Web" on the left, select "ASP. NET Web Application" and click OK3. Press the red section above to select OK, then click "OK", the result pops up the following promptTwo Cause analysisNo NuGet installedThree Solve the problem1. Open the vs2013 and select Tools | extensions and Updates2. Select "Online | Visual StudioClick the Download button for the NuGet package Manager for Visual St

DNS, a distributed database, makes it easier for users to access the Internet. In the Win7 system, we often set up DNS to speed up the network. But sometimes we have access to some of the Web site exception, but also because the DNS does not take effect or exceptions. We can resolve this situation by manually clearing the DNS cache. The method is as follows: 1, first Run "CMD", enter open the Life prompt

When you use exe4j to Baoseng the jar into an EXE executable file, the following exception occurs when you open the EXE file: There are two reasons for this, which can be resolved by two actions: The first of these is: In the Excutable Name box, enter the name of the EXE that will be generated, and "icon File" is a small icon displayed by the application, not selected. Also, if your computer system