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Posted to dev@ambari.apache.org by "Aravindan Vijayan (JIRA)" <ji...@apache.org> on 2015/11/22 23:48:11 UTC
[jira] [Updated] (AMBARI-14007) Fix precision issues in AMS.
[ https://issues.apache.org/jira/browse/AMBARI-14007?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aravindan Vijayan updated AMBARI-14007:
---------------------------------------
Attachment: AMBARI-14007.patch
> 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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