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https://issues.apache.org/jira/browse/HDFS-8792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15700869#comment-15700869
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Takanobu Asanuma commented on HDFS-8792:
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This seems to have a bug. Please see HDFS-11179.
> BlockManager#postponedMisreplicatedBlocks should use a LightWeightHashSet to
> save memory
> ----------------------------------------------------------------------------------------
>
> Key: HDFS-8792
> URL: https://issues.apache.org/jira/browse/HDFS-8792
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Yi Liu
> Assignee: Yi Liu
> Fix For: 2.8.0, 3.0.0-alpha1
>
> Attachments: HDFS-8792.001.patch, HDFS-8792.002.patch,
> HDFS-8792.003.patch
>
>
> {{LightWeightHashSet}} requires fewer memory than java hashset.
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