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https://issues.apache.org/jira/browse/HDFS-7979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14391810#comment-14391810
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Colin Patrick McCabe commented on HDFS-7979:
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Unfortunately, this latest patch always starts with 1... :)
Let's initialize the prevBlockReportId with Random.nextLong.
> Initialize block report IDs with a random number
> ------------------------------------------------
>
> Key: HDFS-7979
> URL: https://issues.apache.org/jira/browse/HDFS-7979
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.7.0
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Priority: Minor
> Attachments: HDFS-7979.001.patch, HDFS-7979.002.patch,
> HDFS-7979.003.patch
>
>
> Right now block report IDs use system nanotime. This isn't that random, so
> let's start it at a random number for some more safety.
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