• Ubuntu system apt reports an error: relocation error


    Today, I can’t get up after updating the system and starting the software. The error is as follows/usr/lib/apt/methods/http: relocation error: /usr/lib/x86_64-linux-gnu/libgnutls.so.30: symbol _idn2_punycode_decode version IDN2_0.0.0 not defined in file libidn2.so.0 with link time referenceThis means that there is a variable undefined in libgnutls.so. The software cannot operate normally.Data access can be downgraded to the previous […]

  • 5.2 data volume for data persistence


    Usage scenario: after the MySQL container is destroyed, the data can be persisted Initialize a MySQL container #For testing purposes, set the root password to null docker run -d –name mysql1 -e MYSQL_ALLOW_EMPTY_PASSWORD=yes mysql:latest View the volume corresponding to the MySQL container MountpointValue of/var/lib/docker/volumes/5bcd1cb1088a71fbf595fb817ea9511501f794ac17971529cd3451102f872a87/_data, which is where the MySQL container saves data to the virtual […]

  • Distributed service fuse downgraded current limiter to hystrix


    Original address 1 Original address 2 Full text overview [TOC] Why need hystrix Hystrix official website address GitHub Hystrix is also Netfix’s contribution to distributed systems. Similarly, it has entered the non maintenance phase. Not maintaining does not mean being eliminated. It can only show that the new technology is constantly iterative. The brilliant design […]

  • Recommend a lightweight HTTP client framework for springboot project. Come and try it!


    staySpringBootProject direct useokhttp、httpClientperhapsRestTemplatelaunchHTTPRequest is cumbersome and inconvenient for unified management. Therefore, a suitable forSpringBootProject’s lightweight HTTP client frameworkretrofit-spring-boot-starter, it is very simple and convenient to use, and provides many function enhancements at the same time. The project has been updated to2.2.2Version, and iterative optimization will continue. Project address:https://github.com/LianjiaTech/retrofit-spring-boot-starter preface RetrofitIs applicable toAndroidandJavaThe biggest feature of […]

  • Problems encountered by Vue when introducing TinyMCE rich text component


    Q: TypeError: Object(…) is not a function at Module../node_modules/[email protected][email protected]@@tinymce/tinymce-vue/lib/es2015/main/ts/components/Editor.js (Editor.js:37) A: Version compatibility issuesBecause @ TinyMCE / TinyMCE- [email protected] For [email protected] Version, need to be downgraded. Q: Icon not foundA: Solution: import ‘TinyMCE / icons / default / icons. Min.js’

  • IPhone 5S downgrade 10.3.3


    means of preparation I use MAC 10.15.5, but it’s best to use a lower version of the system. There will be many problems to be solved in the higher version. 1. First place the tool linkgithub.com/MatthewPierson/Vieux 2. Check your Python environment configuration $ python3 -V There is no installation of Python 3 environment. 3. Installing […]

  • IOS 15 system bugs too many to bear? Teach you hand in hand


    Apple recently released IOS 15 beta. According to past experience, newly released IOS systems often have many bugs. I remind you not to rush to upgrade recently, but many small partners still can’t help but upgrade first. After upgrading, it was found that the beta version was unstable, which completely affected the current use. But […]

  • How to download and install IOS 15 beta [with update suggestions]


    Apple officially released IOS 15 and ipados 15 systems at wwdc2021 developer conference, and launched many new functions, such as FaceTime sharing, focus mode, real-time text, offline Siri, new design notification, etc. The first public beta of IOS 15 and iPad OS 15 was released on June 30. I believe many fruit powder can’t wait […]

  • What is the spring cloud service?


    Modern microservice architectures are distributed and consist of many services. Different services call each other to form a complex call link. The above problems will produce amplification effect in link call. If a ring on a complex link is unstable, it may cascade layer by layer, resulting in the unavailability of the whole link. Therefore, […]

  • Causes and solutions of NPM node sass installation failure


    Causes and solutions of NPM node sass installation failure cause: execute commands on Linux machinesnpm installThere is always a problem with the installation dependency. The error information is as follows npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! [email protected] postinstall: `node scripts/build.js` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at […]

  • IllegalStateException: [..] is not a jakarta.servlet.Filter


    environment Linux/Ubuntu20.04LTS IntelliJ IDEA Community Editon 2021.1 maven 4.0.0 jetty-11.0.5 abnormal java.lang.IllegalStateException: class org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter is not a jakarta.servlet.Filter Using the MVN jetty: run plug-in to run the web application, an exception occurred! Servlet class org.restlet.ext.servlet.serverservlet is not a jakarta.servlet.servlet reason Jakarta.servlet.servlet is part of servlet API version 5.0, and servlet API version 5.0 is part […]

  • What if you regret upgrading your iPhone? Teach you how to lower ios15 back to ios14


    The current versions of IOS 15 and ipados 15 are not official versions, but only beta versions, so there are various bugs. If you don’t feel good about using them, how can you reduce them from IOS 15 to IOS 14? If you are ready to return to stable IOS 14 for some reason, this […]