■ 現象詳細

MySQLのJDBCドライバを v5.1.46 から v8.0.11 にあげたとこと、
以下の「エラー内容」になる

build.gradle

dependencies {    
    // MySQL
    compile group: 'mysql', name: 'mysql-connector-java', version: '5.1.46'
}

dependencies {    
    // MySQL
    compile group: 'mysql', name: 'mysql-connector-java', version: '8.0.11'
}

エラー内容

java.sql.SQLException: The server time zone value '???? (?W????)' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:127)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:87)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:61)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:71)
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:76)
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:862)
	at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:444)
	at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:230)
	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:226)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at java.sql.DriverManager.getConnection(Unknown Source)
	at com.sample.db.SelectDemo.main(SelectDemo.java:15)
Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value '???? (?W????)' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:59)
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:83)
	at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:128)
	at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2201)
	at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2225)
	at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1391)
	at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:993)
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:852)
	... 6 more

サンプル

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class SelectDemo {

  public static void main(String[] args) throws ClassNotFoundException {
    Class.forName("com.mysql.jdbc.Driver");

    try (
        Connection connection = DriverManager.getConnection(
            "jdbc:mysql://localhost:3306/sampledb", "root", "password");
        PreparedStatement preparedStatement = connection
            .prepareStatement("SELECT * FROM person");) {
      ResultSet resultSet = preparedStatement.executeQuery();
      while (resultSet.next()) {
        System.out.println(String.format("id=%s, name=%s",
            resultSet.getString("id"), resultSet.getString("name")));
      }
    } catch (SQLException ex) {
      ex.printStackTrace();
    }
  }
}

■ 解決案

 * 「serverTimezone」を指定する
  => 「serverTimezone=JST」みたいな。

サンプル

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class SelectDemo {

  public static void main(String[] args) throws ClassNotFoundException {
    Class.forName("com.mysql.jdbc.Driver");

    try (
        Connection connection = DriverManager.getConnection(
            "jdbc:mysql://localhost:3306/sampledb?serverTimezone=JST", "root", "password"); // ★ここ★
        PreparedStatement preparedStatement = connection
            .prepareStatement("SELECT * FROM person");) {
      ResultSet resultSet = preparedStatement.executeQuery();
      while (resultSet.next()) {
        System.out.println(String.format("id=%s, name=%s",
            resultSet.getString("id"), resultSet.getString("name")));
      }
    } catch (SQLException ex) {
      ex.printStackTrace();
    }
  }
}

参考文献

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