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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8779) WebUI fails to display block IDs that are larger than 2^53 - 1
Date Tue, 13 Oct 2015 23:18:07 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14955898#comment-14955898
] 

Hudson commented on HDFS-8779:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #535 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/535/])
HDFS-8779. WebUI fails to display block IDs that are larger than 2^53 - (wheat9: rev aa299ecd5e5d0fab6a50dd02e58fb0b4c1804e92)
* hadoop-hdfs-project/hadoop-hdfs/pom.xml
* hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/static/json-bignum.js
* hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/explorer.js
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/explorer.html


> WebUI fails to display block IDs that are larger than 2^53 - 1
> --------------------------------------------------------------
>
>                 Key: HDFS-8779
>                 URL: https://issues.apache.org/jira/browse/HDFS-8779
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>            Reporter: Walter Su
>            Assignee: Haohui Mai
>            Priority: Minor
>             Fix For: 2.8.0
>
>         Attachments: HDFS-8779.005.patch, HDFS-8779.006.patch, 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,
test-006-patch.PNG
>
>
> 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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