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Posted to issues@spark.apache.org by "Robert Kruszewski (JIRA)" <ji...@apache.org> on 2017/06/23 14:24:00 UTC

[jira] [Updated] (SPARK-20952) ParquetFileFormat should forward TaskContext to its forkjoinpool

     [ https://issues.apache.org/jira/browse/SPARK-20952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Kruszewski updated SPARK-20952:
--------------------------------------
    Summary: ParquetFileFormat should forward TaskContext to its forkjoinpool  (was: TaskContext should be an InheritableThreadLocal)

> ParquetFileFormat should forward TaskContext to its forkjoinpool
> ----------------------------------------------------------------
>
>                 Key: SPARK-20952
>                 URL: https://issues.apache.org/jira/browse/SPARK-20952
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.1.1
>            Reporter: Robert Kruszewski
>            Priority: Minor
>
> TaskContext is a ThreadLocal as a result when you fork a thread inside your executor task you lose the handle on the original context set by the executor. We should change it to InheritableThreadLocal so we can access it inside thread pools on executors. 
> See ParquetFileFormat#readFootersInParallel for example of code that uses thread pools inside the tasks.



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