如何将hiveserver2作为服务启动

twh00eeo  于 2021-05-30  发布在  Hadoop
关注(0)|答案(3)|浏览(382)

嗨,所有我已经设置多节点集群(即5个节点)在我的网络工作良好。现在我想使用hive从集群中插入和检索数据,因此我已经在我的主节点上安装了hive最新版本apache-hive-0.14.0-bin.tar.gz(即本文中的0.14.0)。
我还编写了一个java客户机类,它将jdbc连接到hive,并使用hive将数据插入hdfs。
hivejdbcclient.java文件

public class HiveJdbcClient {

private static final String DRIVER_NAME = "org.apache.hive.jdbc.HiveDriver";
    private static final String HIVE_URL = "jdbc:hive2://x.x.x.x:10000/default";
    private static final String HIVE_UNAME = "";
    private static final String HIVE_PWD = "";
    private static Connection con;

    private HiveJdbcClient() {}

    public static Connection getConnection() {
        try {
            if (con == null) {
                synchronized (HiveJdbcClient.class) {
                    if (con == null) {
                        Class.forName(DRIVER_NAME);
                        con = DriverManager.getConnection(HIVE_URL,
                                HIVE_UNAME, HIVE_PWD);
                        System.out.println("Successfuly Connected to database...!");
                    }
                }// End of synchronized block.
            }// End of if block.
        } catch (SQLException e) {
            System.out.println("Can Not able to connect to database pls check your settings \n" + e);
        } catch (ClassNotFoundException e) {
            System.out.println("Can Not able to connect to database pls check your settings \n" + e);
        }// End of try-catch block. 
        return con;
    }// End of getConnection() Method.

    public static ResultSet executeQuery(String sql) {
        ResultSet set = null;
        try {
            if (sql != null) {
                set = getConnection().createStatement().executeQuery(sql);
            }
        } catch (SQLException e) {
            System.out.println("Error while executing query " + e);
        }// End of try-catch block.
        return set;
    }// End of executeQuery() Method.

    public static void main(String[] args) throws ParseException, SQLException {
        ResultSet res = executeQuery("SELECT * FROM mytable");
        while (res.next()) {
            System.out.println(String.valueOf(res.getString(1)) + '\t'
                    + String.valueOf(res.getFloat(2)) + '\t'
                    + String.valueOf(res.getString(3)));
        }
    }
}//End of HiveJdbcClient Class.

当我在终端中运行以下命令时,我的应用程序能够连接到服务器

$HIVE_HOME/bin/hiveserver2
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/opt/hadoop-2.6.0/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/opt/apache-hive-0.14.0-bin/lib/hive-jdbc-0.14.0-standalone.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
OK

但是当我关闭这个终端时,我的应用程序会出现以下错误
错误

java.sql.SQLException: Could not open client transport with JDBC Uri: jdbc:hive2://X.X.X.X:10000/default: java.net.ConnectException: Connection refused

这意味着我必须在主节点上作为服务运行hiveserver2。
有人能帮我把hiveserver2当作服务运行吗。或者任何可以帮助我将hiveserver2作为服务运行的链接。

blpfk2vs

blpfk2vs1#

试试这个

nohup hive --service hiveserver2 &
des4xlb0

des4xlb02#

你试过——服务选项吗?

$HIVE_HOME/bin/hive --service hiveserver2 &
m1m5dgzv

m1m5dgzv3#

对于1.2及以上版本, hive 已弃用,并且 hiveserver2 命令应该直接使用。
因此,在后台启动hiveserver2的正确方法是:

nohup hiveserver2 &

或输出到日志文件:

nohup hiveserver2 > hive.log &

资料来源:https://cwiki.apache.org/confluence/display/hive/gettingstarted#gettingstarted-buildinghivefromsource-它说“调用配置单元”是不赞成的。

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