hive与mysql8.0的安装配置中，进行初始化报错问题

1. org.apache.hadoop.hive.metastore.HiveMetaException: Failed to get schema version. Underlying cause: java.sql.SQLNonTransientConnectionException : Public Key Retrieval is not allowed

MySQL 公钥检索错误，MySQL 8.0 默认启用了公钥检索（public key retrieval）功能，而有时需要在 JDBC 连接 URL 中明确指定允许公钥检索。解决方法： 在你的 JDBC 连接 URL 中，添加 allowPublicKeyRetrieval=true 参数。

<property>
    <name>javax.jdo.option.ConnectionURL</name>
    <value>jdbc:mysql://hadoop102:3306/hive3?createDatabaseIfNotExist=true&amp;useSSL=false&amp;useUnicode=true&amp;characterEncoding=UTF-8&amp;allowPublicKeyRetrieval=true</value>
</property>

2. Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.

jdbc 8.0.20 driver class name 更改*:com.mysql.cj.jdbc.Driver

<property>
    <name>javax.jdo.option.ConnectionDriverName</name>
    <value>com.mysql.cj.jdbc.Driver</value>
</property>

3. 其余可能参数见：MySQL JDBC 连接常见参数-优快云博客