无法通过 thrift 获取配置单元远程 Metastore table 信息

Question

我可以使用以下程序获取本地 mysql 元存储设置中的元存储 table 信息。

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;

public class MetaStoreTest {

    public static void main(String[] args) throws Exception {

        Connection conn = null;
        try {
            HiveConf conf = new HiveConf();
            conf.addResource(new Path("/home/hadoop/hive-0.12.0/conf/hive-site.xml"));
            Class.forName(conf.getVar(ConfVars.METASTORE_CONNECTION_DRIVER));
            conn = DriverManager.getConnection(
                    conf.getVar(ConfVars.METASTORECONNECTURLKEY),
                    conf.getVar(ConfVars.METASTORE_CONNECTION_USER_NAME),
                    conf.getVar(ConfVars.METASTOREPWD));

            Statement st = conn.createStatement();
            ResultSet rs = st.executeQuery(
                "select t.tbl_name, s.location from TBLS t " +
                "join SDS s on t.sd_id = s.sd_id");
            while (rs.next()) {
                System.out.println(rs.getString(1) + " : " + rs.getString(2));
            }
        }
        finally {
            if (conn != null) {
                conn.close();
            }
        }

    }
}

目前正在尝试使用上述程序从远程元存储中获取元存储 tables，使用 thrift.In 我当前的配置单元-site.xml 我有这些参数，

hive.metastore.uris = thrift://host1:9083, thrift://host2:9083
hive.metastore.local = false

没有参数:

javax.jdo.option.ConnectionDriverName, javax.jdo.option.ConnectionUserName, javax.jdo.option.ConnectionPassword

那么，我如何通过 thrift 协议获取元table 信息。我在 host2 上运行ning 上面的代码。请提出建议。

另外，当我运行上面的代码时，它会显示关于 :

的信息

METASTORE_CONNECTION_DRIVER as derby connection embedded driver, 
METASTORECONNECTURLKEY as jdbc:mysql://<host name>/<database name>?createDatabaseIfNotExist=true, 
METASTORE_CONNECTION_USER_NAME as "APP" and 
METASTOREPWD as "mine"

Answer 1

替换这部分代码 :

conf.addResource(new Path("/home/hadoop/hive-0.12.0/conf/hive-site.xml"));
Class.forName(conf.getVar(ConfVars.METASTORE_CONNECTION_DRIVER));
conn = DriverManager.getConnection(
       conf.getVar(ConfVars.METASTORECONNECTURLKEY),
       conf.getVar(ConfVars.METASTORE_CONNECTION_USER_NAME),
       conf.getVar(ConfVars.METASTOREPWD));

与下面 :

Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://host2:3306/metastore", "urusername", "urpassword");

[注意：根据您的设置相应地更改 Metastore 数据库名称、用户和密码。]

现在 :

Statement st = conn.createStatement();
ResultSet rs = st.executeQuery("show tables");
while (rs.next()) {
   System.out.println("Tables:" +rs.getString(1));
}

看看你是否获得了 Metastore table 名称。

无法通过 thrift 获取配置单元远程 Metastore table 信息

Unable to get the hive remote metastore table information over thrift

mysql

hadoop

hive

derby

thrift