Exception in thread "main" org.apache.hadoop.security.AccessControlException: Permission denied: user=lenovo, access=WRITE, inode="/user/hadoop/spark/people_savemode_test/_temporary/0":hadoop:supergro

保存文件时权限被拒绝 曾经踩过的坑： 保存结果到hdfs上没有写的权限 通过修改权限将文件写入到指定的目录下
*
*
* $HADOOP_HOME/bin/hdfs dfs -chmod 777 /user
*
*
* Exception in thread "main" org.apache.hadoop.security.AccessControlException:
* Permission denied: user=Mypc, access=WRITE,
* inode="/":fan:supergroup:drwxr-xr-x

package cn.spark.study.sql;
 
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaSparkContext;
import org.apache.spark.sql.DataFrame;
import org.apache.spark.sql.SQLContext;
import org.apache.spark.sql.SaveMode;
 
/**
 * SaveModel示例
 *
 * @author 张运涛
 *
 */
public class SaveModeTest {
 
    @SuppressWarnings("deprecation")
    public static void main(String[] args) {
        System.setProperty("hadoop.home.dir", "E:\\hadoop-2.7.1");
 
        SparkConf conf = new SparkConf().setMaster("local").setAppName("SaveModeTest");
        JavaSparkContext sc = new JavaSparkContext(conf);
        SQLContext sqlContext = new SQLContext(sc);
 
        DataFrame peopleDF = sqlContext.read().format("json").load("hdfs://zhang:9000/user/hadoop/spark/people.json");
        /**
         * 保存文件时权限被拒绝 曾经踩过的坑： 保存结果到hdfs上没有写的权限 通过修改权限将文件写入到指定的目录下
         *
         *
         * $HADOOP_HOME/bin/hdfs dfs -chmod 777 /user
         *
         *
         * Exception in thread "main" org.apache.hadoop.security.AccessControlException:
         * Permission denied: user=Mypc, access=WRITE,
         * inode="/":fan:supergroup:drwxr-xr-x
         *
         */
 
        peopleDF.save("hdfs://zhang:9000/user/people_savemode_test", "json", SaveMode.Append);
    }
 
}