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https://issues.apache.org/jira/browse/HDFS-7660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14288692#comment-14288692
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Lei (Eddy) Xu commented on HDFS-7660:
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Thank you so much [~hitliuyi]
> BlockReceiver#close() might be called multiple times, which causes the
> fsvolume reference being released incorrectly.
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-7660
> URL: https://issues.apache.org/jira/browse/HDFS-7660
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0
> Reporter: Lei (Eddy) Xu
> Assignee: Lei (Eddy) Xu
> Priority: Minor
> Fix For: 2.7.0
>
> Attachments: HDFS-7660.000.patch
>
>
> {{BlockReceiver.close()}} might be called from multiple places, e.g.
> {{PacketResponder#finalizeBlock}} and {{BlockReceiver#receiveBlock}}.
> As a result, {{BlockReceiver#replicaHander}} should be set to {{null}} after
> release the resource.
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