• Solutions to MySQL error 1045 (28000) problem


    Encountered MySQL error 1045 this problem for a long time, write down. The method is Baidu, pro test effective. ERROR 1045 (28000): Access denied for user ‘ODBC’@’localhost’ (using password: NO) Error 1045 (28000): access denied for user ‘ODBC’ @’localhost ‘(using password: Yes) Windows, the above two error solutions 1. Configuration file found my.ini , and […]

  • Solution to error 1054 (42s22) when changing password in MySQL 5.7


    For the newly installed MySQL 5.7, you will be prompted with an incorrect password when you log in. You did not change your password during installation. Later, you changed your password by password free login and entered update mysql.user Error 1054 (42s22) is prompted when set password = password (‘root ‘) where user:’ root ‘: […]

  • Basic part: deep analysis of Java exception


    Method, an exception object is created and handed to the JVM for processing. The exception object contains the name of the exception, the description of the exception, and the state of the application when the exception occurs. The process of creating an exception object and handing it to the JVM is called throwing an exception. […]

  • Error handling based on react Redux


    This paper is divided into three parts Classification of error Explain in detail how to use Redux to deal with errors in a unified way step by step Collection of error information The technology stack used in this case includes:React,Redux,TypeScript,Axios,Lodash。 Classification of error HTTP request error HTTP request errors can be classified into the following […]

  • Hypothesis test: use the p value to accept or reject your hypothesis


    AuthorCompile | VKSource | analytics vidhya introduce Test is one of the most basic concepts in statistics. Not only in data science, hypothesis testing is very important in various fields. Want to know how to do it? Let’s take an example. Now there’s a lifebuoy shower gel. Shower Gel manufacturers claim it kills 99.9% of […]

  • A memory error in golang channel


    cause Cause investigation Cause analysis Problem solving summary cause In today’s database data reading, we first write the data read from the database to the channel through multiple goroutines, and at the same time read the data from the channel through another goroutine for analysis This is such a simple function. When reading data, the […]

  • The method to solve the error error always pops up when Ajax returns verification


    Send a simple case:Reception: <%@ page language=”java” import=”java.util.*” pageEncoding=”UTF-8″%> <!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”> <html> <head> < title > user login <script type=”text/javascript” src=”../js/jquery-easyui-1.3.5/jquery.min.js”></script> <script type=”text/javascript” src=”../js/jquery-easyui-1.3.5/jquery.easyui.min.js”></script> <link rel=”stylesheet” href=”../js/jquery-easyui-1.3.5/themes/default/easyui.css” type=”text/css”></link> <link rel=”stylesheet” href=”../js/jquery-easyui-1.3.5/themes/icon.css” type=”text/css”></link> <script type=”text/javascript” src=”../js/jquery-easyui-1.3.5/locale/easyui-lang-zh_CN.js”></script> <meta http-equiv=”content-type” content=”text/html;charset=UTF-8″ /> <script type = “text/javascript” charset = “UTF-8”> $(function(){ var loginDialog; loginDialog […]

  • Windows Apache and PHP installation


    Apache download address: https://www.apachehaus.com/cg…PHP download address: https://windows.php.net/downl… 1. Apache installation After downloading Apache, unzip it, use CMD to enter bin, and execute the command: httpd.ext -k install Install Apache for windows.After the installation is successful, you can see the following in the computer management serviceWhen the installation is successful, it will automatically try to start, […]

  • Background 404 error caused by image lazy loading


    Environment Django 1.10.6 origin Today, I received a task to solve the useless errors in the full screen log of the terminal. Django will report the error location to you as accurately as possible, but there are some complex and deep-seated errors. Its own error log is some insufficient, but the log is invalid. process […]

  • Suggest collection for future reference! MySQL common error code description


    Let’s first show you a few examples of error analysis and solutions. 1.ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/data/mysql/mysql.sock’ Problem analysis: the database may not be started or the port is prohibited by the firewall. Solution: start the database or firewall, open the database listening port. 2.ERROR 1045 (28000): Access […]

  • Centos7 installation hive3.1.2


    Hive3.1.2 installation 1. Download wget https://mirrors.tuna.tsinghua.edu.cn/apache/hive/hive-3.1.2/apache-hive-3.1.2-bin.tar.gz 2. Decompression tar -zxvf apache-hive-3.1.2-bin.tar.gz 3. Rename mv apache-hive-3.1.2-bin hive Configure hive 1. Edit hive- site.xml #Create a hive- site.xml file vim /usr/share/hive/conf/hive-site.xml #Add the following content (MySQL is configured to store metadata) <configuration> <property> <name>hive.exec.scratchdir</name> <value>/home/hadoop/scratchdir</value> </property> <property> <name>hive.metastore.warehouse.dir</name> <value>/home/hadoop/warehouse</value> </property> <property> <name>hive.metastore.uris</name> <value>thrift://hadoop:9083</value> </property> <property> <name>javax.jdo.option.ConnectionDriverName</name> <value>com.mysql.cj.jdbc.Driver</value> […]

  • Failed to configure a datasource for springboot startup


    Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug’ enabled.10:30:02.744 logback [main] ERROR o.s.b.d.LoggingFailureAnalysisReporter – APPLICATION FAILED TO START Description:Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.Reason: Failed to determine a suitable driver class Action:Consider the following: If you want an embedded […]