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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10123) Invalid NaN values in Hadoop REST API JSON response
Date Fri, 22 Nov 2013 16:46:36 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13830101#comment-13830101
] 

Hadoop QA commented on HADOOP-10123:
------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12614910/Yarn-691.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-common-project/hadoop-common.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/3310//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/3310//console

This message is automatically generated.

> Invalid NaN values in Hadoop REST API JSON response
> ---------------------------------------------------
>
>                 Key: HADOOP-10123
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10123
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 0.23.6, 2.0.4-alpha
>            Reporter: Kendall Thrapp
>            Assignee: Chen He
>         Attachments: Yarn-691.patch
>
>
> I've been occasionally coming across instances where Hadoop's Cluster Applications REST
API (http://hadoop.apache.org/docs/r0.23.6/hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html#Cluster_Applications_API)
has returned JSON that PHP's json_decode function failed to parse.  I've tracked the syntax
error down to the presence of the unquoted word NaN appearing as a value in the JSON.  For
example:
> "progress":NaN,
> NaN is not part of the JSON spec, so its presence renders the whole JSON string invalid.
 Hadoop needs to return something other than NaN in this case -- perhaps an empty string or
the quoted string "NaN".



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