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https://issues.apache.org/jira/browse/HDFS-5089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13738210#comment-13738210
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Tsz Wo (Nicholas), SZE commented on HDFS-5089:
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The javadoc warnings was introduced by HADOOP-9848 but not related to this.
> When a LayoutVersion support SNAPSHOT, it must support
> FSIMAGE_NAME_OPTIMIZATION.
> ---------------------------------------------------------------------------------
>
> Key: HDFS-5089
> URL: https://issues.apache.org/jira/browse/HDFS-5089
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: h5089_20130813.patch
>
>
> The SNAPSHOT layout requires FSIMAGE_NAME_OPTIMIZATION as a prerequisite.
> However, RESERVED_REL1_3_0 supports SNAPSHOT but not
> FSIMAGE_NAME_OPTIMIZATION.
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