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From "Haibo Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6435) [ATSv2] Can't retrieve more than 1000 versions of metrics in time series
Date Tue, 09 May 2017 21:57:05 GMT

    [ https://issues.apache.org/jira/browse/YARN-6435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16003634#comment-16003634

Haibo Chen commented on YARN-6435:

Thanks for the patch, [~rohithsharma].  The max version is still being set to DEFAULT_METRICS_MAX_VERSIONS
directly, rather than being read from hbaseConf (i.e. it is still not configurable).

> [ATSv2] Can't retrieve more than 1000 versions of metrics in time series
> ------------------------------------------------------------------------
>                 Key: YARN-6435
>                 URL: https://issues.apache.org/jira/browse/YARN-6435
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>            Priority: Critical
>         Attachments: YARN-6435.0001.patch, YARN-6435.YARN-5355.0001.patch
> It is observed that, even though *metricslimit* is set to 1500, maximum number of metrics
values retrieved is 1000. 
> This is due to, while creating EntityTable, metrics column family max version is specified
as 1000 which is hardcoded in {{EntityTable#DEFAULT_METRICS_MAX_VERSIONS}}. So, HBase will
return max version with following {{MIN(cf max version , user provided max version)}}. 
> This behavior is contradicting the documentation which claims that 
> {code}
> metricslimit - If specified, defines the number of metrics to return. Considered only
if fields contains METRICS/ALL or metricstoretrieve is specified. Ignored otherwise. The maximum
possible value for metricslimit can be maximum value of Integer. If it is not specified or
has a value less than 1, and metrics have to be retrieved, then metricslimit will be considered
as 1 i.e. latest single value of metric(s) will be returned.
> {code} 

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