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https://issues.apache.org/jira/browse/HDFS-16121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17377262#comment-17377262
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Stephen O'Donnell commented on HDFS-16121:
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Does it look like this change was introduced by HDFS-13252? If so, then I can
link that issue to this one for tracking.
> Iterative snapshot diff report can generate duplicate records for creates,
> deletes and Renames
> ----------------------------------------------------------------------------------------------
>
> Key: HDFS-16121
> URL: https://issues.apache.org/jira/browse/HDFS-16121
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: snapshots
> Reporter: Srinivasu Majeti
> Assignee: Shashikant Banerjee
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently, iterative snapshot diff report first traverses the created list
> for a directory diff and then the deleted list. If the deleted list size is
> lesser than the created list size, the offset calculation in the respective
> list seems wrong. So the next iteration of diff report generation call, it
> will start iterating the already processed in the created list leading to
> duplicate entries in the list.
> Fix is to correct the offset calculation during the traversal of the deleted
> list.
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