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From "Walter Su (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8779) WebUI can't display randomly generated block ID
Date Thu, 16 Jul 2015 11:18:05 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Walter Su updated HDFS-8779:
    Attachment: after-02-patch.png

Sorry, I can't. The JSON data is just a string in HTTP body. How WebUI shows depends on thr
behavior of browsers. How browser parses the string into JavaScript object.

Upload test screenshots with chrome/ie11/firefox.

> 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, after-02-patch.png, before.png
> Old release use randomly generated block ID(HDFS-4645).
> max value of Long in Java is 2^63-1
> max value of number 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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