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Posted to common-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2013/11/22 17:46:36 UTC
[jira] [Commented] (HADOOP-10123) Invalid NaN values in Hadoop REST
API JSON response
[ 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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