java.sql.SQLException: Unknown initial character set index '255' received from server for connector 8.0.11

Question

While establishing the connection to a MySQL database, I\'m getting the following error

java.sql.SQLException: Unknown initial character set index \'255\' receiv         


        

Answer 1

Setting the CharacterEnconding, useUnicode options will work

jdbc:mysql://localhost:3306/dbname?characterEncoding=utf8&useSSL=false&useUnicode=true"

Answer 2

Use the same version of MySQL as well as mysql-connector. If you are using tomcat then keep the connector in the lib folder of tomcat.

Answer 3

Add connector dependency jar file in the POM file after a cross-check with your MySql server version 8.0.x add this dependency it was working for me mysqlmysql-connector-java 8.0.11

Answer 4

I am using springboot,liquibase, mysql

I got solution: This error occur just because of mysql connector in dependency and mysql server you install not match(in my case i am using lower version mysql connector and latest mysql server). So just change scope of mysql connector to runtime:

maven

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>

gradle

dependencies {
//... other dependencies
runtimeOnly group:'mysql', name:'mysql-connector-java'
}

Or if problem yet not solve then use same version or nearby version for both mysql server and mysql connector.

Answer 5

With version 8 the default characterset changed. When you add your character set to the connection URL like ?characterEncoding=latin1 it might work.

Answer 6

it is because of mysql-connector version , i,e. My-sql install version and dependency version did not match.

use same version for myS