java如何解决AutoloadedDriver40的NoClassDefFoundError？

Question

我对Hadoop和Hive也是新手。我试图通过创建Java项目并添加以下所有必需的库，从Java连接到Hive

$HIVE_HOME/lib/*.jar
$HADOOP_HOME/share/hadoop/mapreduce/*.jar
$HADOOP_HOME/share/hadoop/common/*.jar

下面是我连接Hive数据库的示例代码

package com.stpl.hive.jdbc;

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

public class HiveSample {

    //private static String driverName = "org.apache.hadoop.hive.jdbc.HiveDriver";
private static String driverName = "org.apache.hive.jdbc.HiveDriver";

    public static void main(String[] args) throws SQLException,
            ClassNotFoundException {
        // Register driver and create driver instance
        Class.forName(driverName);
        // get connection
        Connection con = DriverManager.getConnection(
                "jdbc:hive2://localhost:10000/default", "", "");
        Statement stmt = con.createStatement();
        stmt.execute("CREATE DATABASE newdatabase");
        System.out.println("Database userdb created successwdbfully.");
        con.close();
    }
}

在运行时，我的错误率正在下降

Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class org.apache.derby.jdbc.AutoloadedDriver40
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at java.sql.DriverManager.isDriverAllowed(DriverManager.java:556)
    at java.sql.DriverManager.getConnection(DriverManager.java:661)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at com.stpl.hive.jdbc.HiveSample.main(HiveSample.java:18)

我是否遗漏了其他要添加到项目中的罐子？请帮我解决这个错误。我使用的是Hive 2.3.2版本。请问我是否需要任何其他细节来解决它

Answer 1

运行时类的定义不存在时发生java.lang.NoClassDefFoundError

Could not initialize class org.apache.derby.jdbc.AutoloadedDriver40

您似乎缺少derby的驱动程序库，可以通过包含derby-10.5.3.0.jar来解决这个问题