[jira] [Commented] (AMBARI-14007) Fix precision issues in AMS.

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMBARI-14007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15021451#comment-15021451 ] 

Hadoop QA commented on AMBARI-14007:
------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12773747/AMBARI-14007.patch
  against trunk revision .

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/Ambari-trunk-test-patch/4368//console

This message is automatically generated.

> Fix precision issues in AMS.
> ----------------------------
>
>                 Key: AMBARI-14007
>                 URL: https://issues.apache.org/jira/browse/AMBARI-14007
>             Project: Ambari
>          Issue Type: Bug
>    Affects Versions: 2.1.2
>            Reporter: Aravindan Vijayan
>            Assignee: Aravindan Vijayan
>            Priority: Critical
>             Fix For: 2.1.3
>
>         Attachments: AMBARI-14007.patch
>
>
> Problem
> The following error is seen in the ambari server log when different time periods are selected in the Host page.
> 19 Nov 2015 22:27:50,476 ERROR [qtp-client-79] MetricsRequestHelper:96 - Error getting timeline metrics : {"exception":"BadRequestException","message":"java.lang.Exception: Requested precision (SECONDS) for given time range causes result set size of 15840, which exceeds the limit - 11520. Please request higher precision.","javaClassName":"org.apache.hadoop.yarn.webapp.BadRequestException"}
> Bug
> The default metric service result limit of 11520 was not able to satisfy a couple of specific cases of 22 host metrics requested for 2 hours in SECONDS precision.
> Fix
> Change default limit to15840. Covers all time periods of all metric charts in Ambari web. Introduce a simple 1 time retry mechanism in Ambari server according to which the server retries AMS with the same request with higher precision if a request fails due to PrecisionLimitExceededException.



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