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Posted to issues@spark.apache.org by "Robert Kruszewski (JIRA)" <ji...@apache.org> on 2017/06/01 17:26:04 UTC

[jira] [Created] (SPARK-20952) TaskContext should be an InheritableThreadLocal

Robert Kruszewski created SPARK-20952:
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             Summary: TaskContext should be an InheritableThreadLocal
                 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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