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https://issues.apache.org/jira/browse/HDFS-8779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14720399#comment-14720399
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Haohui Mai commented on HDFS-8779:
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I'll upload a patch to demonstrate the idea later today.
> WebUI can't display randomly generated block ID
> -----------------------------------------------
>
> Key: HDFS-8779
> URL: https://issues.apache.org/jira/browse/HDFS-8779
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: webhdfs
> Reporter: Walter Su
> Assignee: Walter Su
> Priority: Minor
> Attachments: HDFS-8779.01.patch, HDFS-8779.02.patch,
> HDFS-8779.03.patch, HDFS-8779.04.patch, after-02-patch.png, before.png,
> patch-to-json-parse.txt
>
>
> Old release use randomly generated block ID(HDFS-4645).
> max value of Long in Java is 2^63-1
> max value of -number-(*integer*) in Javascript is 2^53-1. ( See
> [Link|https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER])
> Which means almost every randomly generated block ID exceeds MAX_SAFE_INTEGER.
> A integer which exceeds MAX_SAFE_INTEGER cannot be represented in Javascript.
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