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https://issues.apache.org/jira/browse/SPARK-23399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Wenchen Fan resolved SPARK-23399.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.3.1

Issue resolved by pull request 20590
[https://github.com/apache/spark/pull/20590]

> Register a task completion listener first for OrcColumnarBatchReader
> --------------------------------------------------------------------
>
>                 Key: SPARK-23399
>                 URL: https://issues.apache.org/jira/browse/SPARK-23399
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Dongjoon Hyun
>            Assignee: Dongjoon Hyun
>            Priority: Major
>             Fix For: 2.3.1
>
>
> This is related with SPARK-23390.
> Currently, there was a opened file leak for OrcColumnarBatchReader.
> {code}
> [info] - Enabling/disabling ignoreMissingFiles using orc (648 milliseconds)
> 15:55:58.673 WARN org.apache.spark.scheduler.TaskSetManager: Lost task 0.0 in 
> stage 61.0 (TID 85, localhost, executor driver): TaskKilled (Stage cancelled)
> 15:55:58.674 WARN org.apache.spark.DebugFilesystem: Leaked filesystem 
> connection created at:
> java.lang.Throwable
>       at 
> org.apache.spark.DebugFilesystem$.addOpenStream(DebugFilesystem.scala:36)
>       at org.apache.spark.DebugFilesystem.open(DebugFilesystem.scala:70)
>       at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:769)
>       at 
> org.apache.orc.impl.RecordReaderUtils$DefaultDataReader.open(RecordReaderUtils.java:173)
>       at 
> org.apache.orc.impl.RecordReaderImpl.<init>(RecordReaderImpl.java:254)
>       at org.apache.orc.impl.ReaderImpl.rows(ReaderImpl.java:633)
>       at 
> org.apache.spark.sql.execution.datasources.orc.OrcColumnarBatchReader.initialize(OrcColumnarBatchReader.java:138)
> {code}



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