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https://issues.apache.org/jira/browse/SPARK-12192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-12192.
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Resolution: Not A Problem
The error shows you that something in your code is attempting to write to a
path that already exists. It's not a Spark issue.
> recommendProductsForUsers(num: Int) can run OK when the dataset is small,but
> run wrong when large amount of data
> -----------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-12192
> URL: https://issues.apache.org/jira/browse/SPARK-12192
> Project: Spark
> Issue Type: Bug
> Components: MLlib
> Affects Versions: 1.5.0
> Reporter: jinglei.chen
>
> recommendProductsForUsers(num: Int) can run OK when the dataset is small,but
> run wrong when large amount of data(about 1517459 users and 1190671 products,
> Every time an error, the error is User class threw exception:
> org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory
> hdfs://recomm-30-1.liepin.inc:9000/recommend/result/job/newb already exists,
> in fact ,the output is deleted before i run ALS)
> my QQ:604586220
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