如何使用Java程序将数据加载到hive中?
我尝试过用命令行方式将数据加载到配置单元中。用这种方法很好 现在我想通过Java加载数据。为此,我编写了代码&我可以创建表、数据库、向其中插入值,但在使用load命令时,它不起作用如何使用Java程序将数据加载到hive中?,java,hadoop,hive,hadoop2,Java,Hadoop,Hive,Hadoop2,我尝试过用命令行方式将数据加载到配置单元中。用这种方法很好 现在我想通过Java加载数据。为此,我编写了代码&我可以创建表、数据库、向其中插入值,但在使用load命令时,它不起作用 private static String driverName = "org.apache.hive.jdbc.HiveDriver"; private static String databaseURL = "jdbc:hive2://server_name:10001/test";
private static String driverName = "org.apache.hive.jdbc.HiveDriver";
private static String databaseURL = "jdbc:hive2://server_name:10001/test";
private static String userName = "<hadoop_user";
private static String password = "<password>";
private static Connection con = null;
private final static Logger log =
private static String dbName="db_name",
tableName="table_name",
path = "";
private void loadData(String path,String tableName) {
// create statement
Statement stmt;
try {
stmt = con.createStatement();
String sql = "LOAD DATA LOCAL INPATH 'file:/"+path+ "' OVERWRITE INTO TABLE "+tableName+"";
System.out.println("Load Data into successful"+sql);
stmt.execute("LOAD DATA LOCAL INPATH 'file:/"+path+ "' OVERWRITE INTO TABLE "+tableName+"");
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
我尝试的是:
1) 我在表的HDFS路径上将所有权限授予hadoop用户
2) 我授予表的所有权限,如选择、插入、删除
请帮助我解决此问题。请确保以下各项:-
- 如果您有kerberos安全设置,请不要忘记使用kinit
- 用户“hadoop”应具有对文件夹(配置单元表位置)进行写入的权限。-对于要更改权限的任何HDFS路径,简单的“更改权限”或“chmod”命令都不起作用。您需要运行“hdfs dfs-setfacl-R-m user::rwx”
- 此外,请确保此表位置的父目录与您能够成功创建的其他表的父目录相同。[有时,管理员可以限制在其他位置创建表]
Caused by: org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAccessControlException: Permission denied: Principal [name=hadoop, type=USER] does not have following privileges for operation LOAD [[SELECT, INSERT, DELETE, OBJECT OWNERSHIP] on Object [type=LOCAL_URI, name=file:/D:/DTCC/Pig/Dummy_data_Main.tsv]]
at org.apache.hadoop.hive.ql.security.authorization.plugin.sqlstd.SQLAuthorizationUtils.assertNoDeniedPermissions(SQLAuthorizationUtils.java:414)
at org.apache.hadoop.hive.ql.security.authorization.plugin.sqlstd.SQLStdHiveAuthorizationValidator.checkPrivileges(SQLStdHiveAuthorizationValidator.java:96)
at org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAuthorizerImpl.checkPrivileges(HiveAuthorizerImpl.java:85)
at org.apache.hadoop.hive.ql.Driver.doAuthorizationV2(Driver.java:725)
at org.apache.hadoop.hive.ql.Driver.doAuthorization(Driver.java:518)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:455)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:303)
at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:1067)
at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:1061)
at org.apache.hive.service.cli.operation.SQLOperation.prepare(SQLOperation.java:100)
... 15 more