版本情况:
win10
spark-2.3.0-bin-hadoop2.6
python3.5
jdk1.8.0_161
同样的代码在Jupyter 完全可以执行
执行代码如下
try:
sc.stop()
except:
pass
from pyspark import SparkContext
sc = SparkContext()
# sc.master
rdd = sc.textFile("rating2.csv")
ratings = rdd.map(lambda line: line.split(";"))
ratingsRDD = ratings.map(lambda x: (x[0], x[1], x[2]))
ratings.persist()
# #训练模型
from pyspark.mllib.recommendation import ALS
model = ALS.train(ratings, 5, 5, 0.01)
# # #基于book推荐
user_com = model.recommendUsers(int(id_book), 6)
pycharm 报错:
19/03/01 08:50:45 ERROR SparkUncaughtExceptionHandler: Uncaught exception in thread Thread[main,5,main]
java.util.NoSuchElementException: key not found: _PYSPARK_DRIVER_CALLBACK_HOST
at scala.collection.MapLike$class.default(MapLike.scala:228)
at scala.collection.AbstractMap.default(Map.scala:59)
at scala.collection.MapLike$class.apply(MapLike.scala:141)
at scala.collection.AbstractMap.apply(Map.scala:59)
at org.apache.spark.api.python.PythonGatewayServer$$anonfun$main$1.apply$mcV$sp(PythonGatewayServer.scala:50)
at org.apache.spark.util.Utils$.tryOrExit(Utils.scala:1302)
at org.apache.spark.api.python.PythonGatewayServer$.main(PythonGatewayServer.scala:37)
at org.apache.spark.api.python.PythonGatewayServer.main(PythonGatewayServer.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.spark.deploy.JavaMainApplication.start(SparkApplication.scala:52)
at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:879)
at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:197)
at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:227)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:136)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Process finished with exit code -1073740791 (0xC0000409)