I'm using the mysql7.5 version of the test, Jira is 6.3.6! This is the issue caused by the version!native MySQL drive jar package on the server: Mysql-connector-java-5.1.18-bin refer to: https://jira.atlassian.com/browse/JRA-40198 replace the MySQL driver pack https://github.com/yurii-github/mysql-connector-j/blob/release/5.1/ Mysql-connector-java-5.1.38-snapshot-bin.jar get Mysql-connector-java-5.1.38-snapshot-bin!!! R
Interpreting L2 Ethernet ports and link types with experience
L2 Ethernet port
Vswitches include Access, Trunk, Hybrid, and QinQ layer-2 Ethernet ports. In this section, the Ethernet ports of the first three L2 switches can be added to a specific VLAN Based on the port VLAN division method. However, only the Hybrid ports can be added to all other VLAN division methods. The QinQ port is only used to support
-1In the hard link experiment we deleted the origin file, rather than deleting the Lorem ipsum data, but simply deleted the origin file (the name file that points to Lorem ipsum data). Therefore, the data is not deleted and we still have access to the Lorem ipsum data through the Origin_hard file. However, the soft link is not so, see figure 2.Figure-2In Figure 2, the soft
{Add ();}return 0;}The result is:0 11 22 33 44 5Stack area:Stack: The system automatically allocates and releases: for example, a local variable function or a code block at the end of the release because the local variable is stored in the stack area.Heap: Developers apply and release themselves (for example, call void *malloc ()). Its life cycle is the developer's decision.When you use malloc, it is created and destroyed after free.Constant zone: stores constant data, which is present at the en
the deletion and update operations on the master table.
Cascade deletion: if you delete a record in the master table, all records with the same foreign key value as the primary key value in the master table will also be deleted.
Cascade update: if the primary key value of the master table is updated, the foreign key value recorded in the table is also updated.
3. User-Defined integrity rules
User-Defined integrity rules: they are integrity constraints for an application environment. They r
ScopeWhen a variable is declared in a part of the program, he can be accessed only in a certain area of the program, and the compiler confirms 4 different types of scopes: file scope, function scope, code block scope, and prototype scope1. code block scope : All statements that lie between a pair of curly braces are called a block of code. Any identifier declared at the beginning of a code block has a code block scope, indicating that he can be access
avoid incompatibility problem.3. Combine the advantages of both full-static and full-dynamic link.4. It is difficult to identify which libraries are prone to incompatibility problems, and now only rely on experience accumulation.5. Some features will be lost due to the selected standard library version.Linux Static Library link order problem and solution:As mentioned in the GCC Handbook:It makes a differen
Seven types of LSA (link status announcement) in OSPF are also necessary to define multiple types of LSA announcements because the OSPF protocol defines multiple router types. For example, a DR router must advertise a multi-channel access link and all routers connected to th
The Ethernet port has three link types: Access Hybrid and Trunk. An Access port can belong to only one VLAN and is generally used to connect to a computer. A Trunk port can belong to multiple VLANs and receive and send packets from multiple VLANs, it is generally used for ports connected between switches. Hybrid ports can belong to multiple VLANs and can receive and send packets from multiple VLANs, it can
You may have realized that you can create a CSS rollover effect by specifying a different style for each key link, which includes normal link (normal), access, flip, and activate. And, you may also know that the order of CSS types can have an effect difference, and the style of the CSS code will replace the style of the previous order for the same element. It is
Css| links you may have realized that you can create a CSS rollover effect by specifying a different style for each key link, which includes normal link (normal), access, flip, and activate. And, you may also know that the order of CSS types can have an effect difference, and the style of the CSS code will replace the style of the previous order for the same elem
before connection--max_allowed_packet=#//server receive/Send packet maximum length--net_buffer_length=#//tcp/ The IP and socket communication buffer size. --select_limit=#//Automatic restriction of the SELECT statement when using--safe-updates--max_join_size=#//automatic restriction of rows in joins when using--safe-updates--secure-auth// Refuse to connect to the database using (pre-4.1.1)--server-arg=name//send Embedded Server this as a parameter. --show-warnings//Display warningMySQL command-
After Baidu big update, and a group of sites were used as cannon fodder disappeared without a trace, the author of several test sites also suffered unequal treatment, enjoy Baidu "reward", and how to have to rise again, so to several sites comprehensive analysis, found in these sites my search engine optimization budget is almost equal , but there are differences in the page strategy and link building portfolio, which makes the author think of the cur
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