linux运维交流学习

问题1： root 用户运行pyspark 没问题 hadoop 用户运行就报如下错 df1 = spark.read.format("com.mongodb.spark.sql.DefaultSource").option("collection","devices").load() 17/02/15 19:34:26 WARN MongoInferSchema: Field 'de...

import org.apache.spark.sql.SQLContext import org.apache.spark.{SparkConf, SparkContext} import org.apache.spark.sql.types._ import spark.implicits._ import org.apache.spark.sql.functions.udf i...