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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2022/04/04 19:35:00 UTC
[jira] [Commented] (SPARK-38677) pyspark hangs in local mode running rdd map operation
[ https://issues.apache.org/jira/browse/SPARK-38677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17517063#comment-17517063 ]
Apache Spark commented on SPARK-38677:
--------------------------------------
User 'ankurdave' has created a pull request for this issue:
https://github.com/apache/spark/pull/36065
> pyspark hangs in local mode running rdd map operation
> -----------------------------------------------------
>
> Key: SPARK-38677
> URL: https://issues.apache.org/jira/browse/SPARK-38677
> Project: Spark
> Issue Type: Bug
> Components: PySpark
> Affects Versions: 3.2.1, 3.3.0
> Reporter: Thomas Graves
> Priority: Blocker
>
> In spark 3.2.1 (spark 3.2.0 doesn't show this issue), pyspark will hang when running and RDD map operations and converting to a dataframe. Code is below to reproduce.
> Env:
> spark 3.2.1 local mode, just run {{./bin/pyspark --driver-memory XXXXG --driver-cores XXXX}}
> {{download dataset from here [https://rapidsai-data.s3.us-east-2.amazonaws.com/spark/mortgage.zip]}}
> {{just 200000 rows could reproduce the issue }}{{head -n 200000 mortgage_eval_merged.csv > mortgage_eval_merged-small.csv}}{{{} but if the input dataset is small, such 50000 rows, it works well.{}}}{{{{}}{}}}run codes below:
> {code:java}
> path = "/XXXX/mortgage_eval_merged-small.csv"
> src_data = sc.textFile(path).map(lambda x:x.split(","))
> column_list =['c1','c2','c3','c4','c5','c6','c7','c8','c9','c10','c11','c12','c13','c14','c15','c16','c17','c18','c19','c20','c21','c22','c23','c24','c25','c26','c27','c28']
> df = spark.createDataFrame(src_data,column_list)
> print(df.show(1)){code}
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