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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/07/07 16:39:11 UTC
[jira] [Assigned] (SPARK-16420) UnsafeShuffleWriter leaks
compression streams with off-heap memory.
[ https://issues.apache.org/jira/browse/SPARK-16420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-16420:
------------------------------------
Assignee: Apache Spark
> UnsafeShuffleWriter leaks compression streams with off-heap memory.
> -------------------------------------------------------------------
>
> Key: SPARK-16420
> URL: https://issues.apache.org/jira/browse/SPARK-16420
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.0.0
> Reporter: Ryan Blue
> Assignee: Apache Spark
>
> When merging spill files using Java file streams, {{UnsafeShuffleWriter}} opens a decompression stream for each shuffle part and [never closes them|https://github.com/apache/spark/blob/master/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java#L352-357]. When the compression codec holds off-heap resources, these aren't cleaned up until the finalizer is called.
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