Programmer Think

SpringBoot-24 - detailed explanation of jackson configuration of default Json framework How spring boot returns JSON data At present, there are three JSon formats provided by SpringBoot: Default jackson Gson JsonB fastjson (this is provided by Alibaba and is now widely used in China) We can see all these in the spring boot autoconfigur ...

This article was first published in Nebula Graph Community official accountSolution ideasThe most convenient way to solve the problem that K8s cannot connect to the cluster after deploying the Nebula Graph cluster is to run the nebula algorithm / Nebula spark in the same network namespace as the nebula operator, and fill in the MetaD domain nam ...

Start with the top commandExecute the top command on the Linux shell, and you can see such a line of CPU utilization data:%Cpu(s): 0.1 us, 0.0 sy, 0.0 ni, 99.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 stHere is a reference to the Linux man pages of the top command:http://man7.org/linux/man-pages/man1/top.1.htmlus, user: time running un-niced user ...

No Dialect mapping for JDBC type: 1111 problem solution Error reporting reason Because each database has its own dialect, and the simple understanding of dialect is to make a mapping relationship for the unique data types and functions of some databases, and 1111 can't find the corresponding value of dialect because there is no mapping relati ...

You can visit my knowledge: https://zhuanlan.zhihu.com/p/478576485 Official documents: https://pytorch.org/docs/master/torch.html Chinese documents: https://pytorch-cn.readthedocs.io/zh/latest/ torch Foundation torch.device(): the GPU training model will be used device = torch.device('cuda:0' if torch.cuda.is_available() else 'cpu') # If mul ...

Case description: For the cluster log of KingbaseES R3 cluster, the default system does not cut and clean up. With the increase of running time, the log will grow into a very large file, occupy a large disk space, and the efficiency is very low when analyzing problems and reading large files. Therefore, this case uses the Logrotate tool of Linu ...

abstractComputer based students are probably familiar with the word pipeline. Especially in Linux system, pipeline operator has been widely used and has brought great convenience to our transformation. The scaffold "gulp" noted in the front-end field is also famous for its pipeline operation.Today, let's take a step-by-step look at ho ...

Note: mybatis plus is configured with multiple data sources. After adding transactions, the data source switching fails1, Scene descriptionFor multiple data sources used in the project, Impl has a method: MethodA.@Service @AllArgsConstructor @DS("tableA") public class XXXXServiceImpl extends ServiceImpl<XXXXMapper, XXXX> implements XXXXSe ...

ForewordFlink SQL is simple, easy to use and powerful. One of the important factors is that it has rich connector components. Connector is the carrier of Flink's interaction with external systems, and is divided into two categories: Source responsible for reading and Sink responsible for writing. However, the built-in connector of Flink SQL may ...

JavaScript operator reference material: Priority of operators in JavaScript Operator (priority from high to low)describe[] ()Field access, array subscripts, function calls, and expression grouping++ -- - ~ ! delete new typeof voidUnary operator, return data type, object creation, undefined value* / %Multiplication, division, modulo+ - +Addit ...