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Posted to issues@spark.apache.org by "Eyal Farago (JIRA)" <ji...@apache.org> on 2017/08/08 13:50:00 UTC
[jira] [Commented] (SPARK-3151) DiskStore attempts to map any size
BlockId without checking MappedByteBuffer limit
[ https://issues.apache.org/jira/browse/SPARK-3151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16118347#comment-16118347 ]
Eyal Farago commented on SPARK-3151:
------------------------------------
created PR 18855: https://github.com/apache/spark/pull/18855
> DiskStore attempts to map any size BlockId without checking MappedByteBuffer limit
> ----------------------------------------------------------------------------------
>
> Key: SPARK-3151
> URL: https://issues.apache.org/jira/browse/SPARK-3151
> Project: Spark
> Issue Type: Bug
> Components: Block Manager, Spark Core
> Affects Versions: 1.0.2
> Environment: IBM 64-bit JVM PPC64
> Reporter: Damon Brown
> Priority: Minor
>
> [DiskStore|https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/storage/DiskStore.scala] attempts to memory map the block file in {{def getBytes}}. If the file is larger than 2GB (Integer.MAX_VALUE) as specified by [FileChannel.map|http://docs.oracle.com/javase/7/docs/api/java/nio/channels/FileChannel.html#map%28java.nio.channels.FileChannel.MapMode,%20long,%20long%29], then the memory map fails.
> {code}
> Some(channel.map(MapMode.READ_ONLY, segment.offset, segment.length)) # line 104
> {code}
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