火花&LT;&控制台GT;:12:错误:未找到:SC值 [英] spark <console>:12: error: not found: value sc
问题描述
我写了以下内容:
val a = 1 to 10000
val b = sc.parallelize(a)
和它显示错误说:
<console>:12: error: not found: value sc
任何帮助吗?
推荐答案
我尝试在Cloudera的快速启动VM星火当打这个错误。原来是在/用户/火花的HDFS文件权限的问题。
I hit this error when trying out Spark on cloudera quickstart VM. Turned out to be an hdfs file permission issue on /user/spark.
我不能切换到用户的火花,我得到了用户不可用错误。
用下面的命令更改文件权限解决了我。
I could not switch to user "spark", I got a user not available error. Changing file permissions with the below command solved it for me.
须藤-u Hadoop的HDFS FS -chmod -R 1777 /用户/火花
sudo -u hdfs hadoop fs -chmod -R 1777 /user/spark
斯卡拉> VAL数据= 1〜10000
数据:scala.collection.immutable.Range.Inclusive =范围(1,2,3,4,5,6,161,162,163,164,165,166,167,168,169,170 ...
斯卡拉> VAL distData = sc.parallelize(数据)
distData:org.apache.spark.rdd.RDD [INT] = ParallelCollectionRDD [0]在并行化:14
scala> val data = 1 to 10000 data: scala.collection.immutable.Range.Inclusive = Range(1, 2, 3, 4, 5, 6, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170... scala> val distData = sc.parallelize(data) distData: org.apache.spark.rdd.RDD[Int] = ParallelCollectionRDD[0] at parallelize at :14
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