我正在使用Hive 0.12,我正在尝试从apache中获取JDBC。当我尝试运行代码时,我得到apache.thrift.TApplicationException。
import java.sql.SQLException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.sql.DriverManager;
public class HiveJdbcClient {
private static String driverName = "org.apache.hive.jdbc.HiveDriver";
/**
* @param args
* @throws SQLException
*/
public static void main(String[] args) throws SQLException {
try {
Class.forName(driverName);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.exit(1);
}
//replace "hive" here with the name of the user the queries should run as
Connection con = DriverManager.getConnection("jdbc:hive2://localhost:10000/default", "hive", "");
Statement stmt = con.createStatement();
String tableName = "testHiveDriverTable";
stmt.execute("drop table if exists " + tableName);
stmt.execute("create table " + tableName + " (key int, value string)");
// show tables
String sql = "show tables '" + tableName + "'";
System.out.println("Running: " + sql);
ResultSet res = stmt.executeQuery(sql);
if (res.next()) {
System.out.println(res.getString(1));
}
// describe table
sql = "describe " + tableName;
System.out.println("Running: " + sql);
res = stmt.executeQuery(sql);
while (res.next()) {
System.out.println(res.getString(1) + "\t" + res.getString(2));
}
// load data into table
// NOTE: filepath has to be local to the hive server
// NOTE: /tmp/a.txt is a ctrl-A separated file with two fields per line
String filepath = "/tmp/a.txt";
sql = "load data local inpath '" + filepath + "' into table " + tableName;
System.out.println("Running: " + sql);
stmt.execute(sql);
// select * query
sql = "select * from " + tableName;
System.out.println("Running: " + sql);
res = stmt.executeQuery(sql);
while (res.next()) {
System.out.println(String.valueOf(res.getInt(1)) + "\t" + res.getString(2));
}
// regular hive query
sql = "select count(1) from " + tableName;
System.out.println("Running: " + sql);
res = stmt.executeQuery(sql);
while (res.next()) {
System.out.println(res.getString(1));
}
}
}
我导入了所有必要的jar,当我尝试运行代码时,出现以下错误:
org.apache.thrift.TApplicationException: Required field 'client_protocol' is unset! Struct:TOpenSessionReq(client_protocol:null)
我该如何解决这个问题?
答案 0 :(得分:21)
这表示客户端和服务器之间的版本不匹配,即客户端比服务器更新,这是您的情况。
答案 1 :(得分:13)
同样的问题。如果设置
,它可以工作hive JDBC Maven Repo版本为1.1.0。
检查这个jira。 HIve 0.13不支持最新的hive-jdbc版本。 https://issues.apache.org/jira/browse/HIVE-6050
在你的pom中添加它。
expression()
答案 2 :(得分:0)
即使我遇到同样的问题,也可以通过以下步骤来解决问题
步骤01: - 使用以下链接在您的eclipse(可能是IDE)上包含Hive lib jar。
http://mirrors.supportex.net/apache/hive/hive-1.0.1/(apache-hive-1.0.1-bin.tar.gz)
步骤02:添加hadoop-core-1.1.0 jar
正如所有人都提到的那样,由于版本与hadoop standalone和hadoop core不匹配而发生此错误。
答案 3 :(得分:-1)
我面临着同样的问题。我按照以下步骤解决了这个问题。
<dependency>
<groupId>org.apache.hive</groupId>
<artifactId>hive-jdbc</artifactId>
<version>1.1.0</version>
<classifier>standalone</classifier>
<exclusions>
<exclusion>
<groupId>org.eclipse.jetty.aggregate</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>
Class.forName("org.apache.hive.jdbc.HiveDriver");
在致电DriverManager.getConnection(url);