Hive分区异常

org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:For direct MetaStore DB connections, we don't support retries at the client level.)

当向分区写入数据或刷分区的时候，报出这个异常。网上的说的办法有很多，综合起来就两个，这有点像小霸王的游戏卡，300合1 其实就是4合1
一种是设置MySQL库的字符集为latin1，我的库里本来就是latin1，我还是又设置了一遍，重启hive，果然无效；
另一种是替换其他版本的mysql-connector-java，我替换了两个版本都不行。

最后的解决办法是修改元数据库的名字，不用hive，换成其他的比如hive_metastore，就可以了。

    <property>
        <name>javax.jdo.option.ConnectionUserName</name>
        <value>root</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionPassword</name>
        <value>root</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionURL</name>
        <value>jdbc:mysql:///hive_metastore?createDatabaseIfNotExists=true</value>
    </property>
    <property>
        <name>javax.jdo.option.ConnectionDriverName</name>
        <value>com.mysql.jdbc.Driver</value>
    </property>

报错的信息在源码中如下，

  @Override
  public void reconnect() throws MetaException {
    if (localMetaStore) {
      // For direct DB connections we don't yet support reestablishing connections.
      throw new MetaException("For direct MetaStore DB connections, we don't support retries" +
          " at the client level.");
    } else {
      close();
      // Swap the first element of the metastoreUris[] with a random element from the rest
      // of the array. Rationale being that this method will generally be called when the default
      // connection has died and the default connection is likely to be the first array element.
      promoteRandomMetaStoreURI();
      open();
    }
  }

所以，虽然问题解决了，但这还是不排除原来的库连接有什么问题，毕竟换了新的元数据库了。

参考博客：https://blog.csdn.net/RUIMENG...