How to resolve Unable to load authentication plugin 'caching_sha2_password' issue

Question

In the eclipse when I had started my application, I got this error - Could not discover the dialect to use. java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'.

at java.sql.SQLException: Unable to load authentication plugin 'caching_sha2_password'. at at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:868) at at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:864) at at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1746) at at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1226) at at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2191) at at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2222) at at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2017) at at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:779) at at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47) at at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at at java.lang.reflect.Constructor.newInstance(Unknown Source) at at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) at at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:389) at at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330) at at java.sql.DriverManager.getConnection(Unknown Source) at at java.sql.DriverManager.getConnection(Unknown Source) at at ch.qos.logback.core.db.DriverManagerConnectionSource.getConnection(DriverManagerConnectionSource.java:54) at at ch.qos.logback.core.db.ConnectionSourceBase.discoverConnectionProperties(ConnectionSourceBase.java:46) at at ch.qos.logback.core.db.DriverManagerConnectionSource.start(DriverManagerConnectionSource.java:38) at at ch.qos.logback.core.joran.action.NestedComplexPropertyIA.end(NestedComplexPropertyIA.java:161) at at ch.qos.logback.core.joran.spi.Interpreter.callEndAction(Interpreter.java:309) at at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:193) at at ch.qos.logback.core.joran.spi.Interpreter.endElement(Interpreter.java:179) at at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:62) at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:165) at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:152) at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:110) at at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:53) at at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75) at at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:150) at at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:84) at at org.slf4j.impl.StaticLoggerBinder.(StaticLoggerBinder.java:55) at at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150) at at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124) at at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:412) at at ch.qos.logback.classic.util.StatusViaSLF4JLoggerFactory.addStatus(StatusViaSLF4JLoggerFactory.java:32) at at ch.qos.logback.classic.util.StatusViaSLF4JLoggerFactory.addInfo(StatusViaSLF4JLoggerFactory.java:20) at at ch.qos.logback.classic.servlet.LogbackServletContainerInitializer.onStartup(LogbackServletContainerInitializer.java:32) at at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5245) at at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1421) at at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1411) at at java.util.concurrent.FutureTask.run(Unknown Source) at at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at at java.lang.Thread.run(Unknown Source)

Answer 1

Starting with the MySQL 8.0.4, they have changed the default authentication plugin for MySQL server from mysql_native_password to caching_sha2_password.

You can try running the below command to resolve the issue.

sample username / password => student / pass123

ALTER USER 'student'@'localhost' IDENTIFIED WITH mysql_native_password BY 'pass123';

You can refer the official page for details: MySQL Reference Manual

If you want to learn more about SQL, Check out this SQL Certification by Intellipaat.