Allen Wittenauer commented on YARN-3862:

bq. do you know what's going on? Thanks.

Yes.  As was announced on common-dev@, yetus is now using the dockerfile that 
ships with Hadoop.  So, for at least the 2nd time I'm aware of, this branch is 
missing build fixes....  This time it looks like 
0ca8df716a1bb8e7f894914fb0d740a1d14df8e3 . FWIW, this is going to be happening 
a lot.  It'd might make your lives easier to keep track of changes in files 
that are directly build related...

> Support for fetching specific configs and metrics based on prefixes
> -------------------------------------------------------------------
>                 Key: YARN-3862
>                 URL: https://issues.apache.org/jira/browse/YARN-3862
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Varun Saxena
>            Assignee: Varun Saxena
>              Labels: yarn-2928-1st-milestone
>         Attachments: YARN-3862-YARN-2928.wip.01.patch, 
> YARN-3862-YARN-2928.wip.02.patch, YARN-3862-feature-YARN-2928.04.patch, 
> YARN-3862-feature-YARN-2928.wip.03.patch
> Currently, we will retrieve all the contents of the field if that field is 
> specified in the query API. In case of configs and metrics, this can become a 
> lot of data even though the user doesn't need it. So we need to provide a way 
> to query only a set of configs or metrics.
> As a comma spearated list of configs/metrics to be returned will be quite 
> cumbersome to specify, we have to support either of the following options :
> # Prefix match
> # Regex
> # Group the configs/metrics and query that group.
> We also need a facility to specify a metric time window to return metrics in 
> a that window. This may be useful in plotting graphs 

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