使用mycat读写分离操作，出现错误CLIENT_PLUGIN_AUTH is required

2021-07-10 16:47:45.041 ERROR 19948 --- [reate-424832797] com.alibaba.druid.pool.DruidDataSource   : create connection SQLException, url: jdbc:mysql://192.168.135.128:8066/aa?serverTimezone=Asia/Shanghai&characterEncoding=UTF-8, errorCode 0, state 08001

java.sql.SQLNonTransientConnectionException: CLIENT_PLUGIN_AUTH is required
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:79) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:833) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:453) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:198) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1657) ~[druid-1.2.6.jar:1.2.6]
    at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1723) ~[druid-1.2.6.jar:1.2.6]
    at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2801) ~[druid-1.2.6.jar:1.2.6]
Caused by: com.mysql.cj.exceptions.UnableToConnectException: CLIENT_PLUGIN_AUTH is required
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na]
    at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500) ~[na:na]
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481) ~[na:na]
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:151) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1353) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.NativeSession.connect(NativeSession.java:157) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:953) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:823) ~[mysql-connector-java-8.0.25.jar:8.0.25]
    ... 6 common frames omitted

若在使用mycat读写分离的验证中，发生以上错误，搞了好久，就是MySQL的驱动出现了问题，必须要使用mysql 5.x 的驱动，不论你的linux上面的MySQL安装的是5 还是8 都必须连接5的驱动。当然了，pom.xml 也要将MySQL的连接依赖改为5.x