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https://issues.apache.org/jira/browse/SPARK-30198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-30198:
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Affects Version/s: 1.6.3
> BytesToBytesMap does not grow internal long array as expected
> -------------------------------------------------------------
>
> Key: SPARK-30198
> URL: https://issues.apache.org/jira/browse/SPARK-30198
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.6.3, 2.0.2, 2.1.3, 2.2.3, 2.3.4, 2.4.4, 3.0.0
> Reporter: L. C. Hsieh
> Assignee: L. C. Hsieh
> Priority: Major
> Fix For: 2.4.5, 3.0.0
>
>
> One Spark job on our cluster hangs forever at BytesToBytesMap.safeLookup.
> After inspecting, the long array size is 536870912.
> Currently in BytesToBytesMap.append, we only grow the internal array if the
> size of the array is less than its MAX_CAPACITY that is 536870912. So in
> above case, the array can not be grown up, and safeLookup can not find an
> empty slot forever.
> But it is wrong because we use two array entries per key, so the array size
> is twice the capacity. We should compare the current capacity of the array,
> instead of its size.
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