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https://issues.apache.org/jira/browse/HDFS-16939?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17698373#comment-17698373
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Xiaoqiao He commented on HDFS-16939:
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[[email protected]] Thanks for your reminder, [~zhangshuyan] is checking now.
However I am not sure if we could be ready before next week. IMO this bugfix
should not block release progress, because this is corner case and it does not
impact core logic even if it is triggered. Anyway, I will sync here no mater if
ready or not. Thanks again.
> Fix the thread safety bug in LowRedundancyBlocks
> ------------------------------------------------
>
> Key: HDFS-16939
> URL: https://issues.apache.org/jira/browse/HDFS-16939
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namanode
> Reporter: Shuyan Zhang
> Assignee: Shuyan Zhang
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.4.0
>
>
> The remove method in LowRedundancyBlocks is not protected by synchronized.
> This method is private and is called by BlockManager. As a result,
> priorityQueues has the risk of being accessed concurrently by multiple
> threads.
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