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https://issues.apache.org/jira/browse/HDFS-1717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13002341#comment-13002341
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Tsz Wo (Nicholas), SZE commented on HDFS-1717:
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+1 HDFS-1717.3.patch looks good
> Federation: FSDataset volumeMap access is not correctly synchronized
> ---------------------------------------------------------------------
>
> Key: HDFS-1717
> URL: https://issues.apache.org/jira/browse/HDFS-1717
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: data-node
> Affects Versions: Federation Branch
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Fix For: Federation Branch
>
> Attachments: HDFS-1717.1.patch, HDFS-1717.2.patch, HDFS-1717.3.patch,
> HDFS-1717.patch
>
>
> FSDataset volumeMap access has several issues:
> # Access to it is not synchronized all the time, using FSDataset.this as
> lock, as expected.
> # It is synchronized using different locks.
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