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https://issues.apache.org/jira/browse/HADOOP-9090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mostafa Elhemali updated HADOOP-9090:
-------------------------------------
Attachment: HADOOP-9090.justEnhanceDefaultImpl.5.patch
Thanks Ravi for the feedback - I knew it was a bit controversial to put this
method in the MetricsSystem interface and require it from other systems, but I
figured it's the only way for outside customer to really take advantage of this
since MetricsSystemImpl is not intended for out-of-Hadoop consumption. Having
said that, my immediate need would be met without putting it in the interface
so I took that out for now (we can always add it in another explicit JIRA if
needed).
I've also added a new multi-threaded test in the new patch to make sure
everything is alright there.
> Refactor MetricsSystemImpl to allow for an on-demand publish system
> -------------------------------------------------------------------
>
> Key: HADOOP-9090
> URL: https://issues.apache.org/jira/browse/HADOOP-9090
> Project: Hadoop Common
> Issue Type: New Feature
> Components: metrics
> Reporter: Mostafa Elhemali
> Priority: Minor
> Attachments: HADOOP-9090.2.patch,
> HADOOP-9090.justEnhanceDefaultImpl.2.patch,
> HADOOP-9090.justEnhanceDefaultImpl.3.patch,
> HADOOP-9090.justEnhanceDefaultImpl.4.patch,
> HADOOP-9090.justEnhanceDefaultImpl.5.patch,
> HADOOP-9090.justEnhanceDefaultImpl.patch, HADOOP-9090.patch
>
>
> Updated description based on feedback:
> We have a need to publish metrics out of some short-living processes, which
> is not really well-suited to the current metrics system implementation which
> periodically publishes metrics asynchronously (a behavior that works great
> for long-living processes). Of course I could write my own metrics system,
> but it seems like such a waste to rewrite all the awesome code currently in
> the MetricsSystemImpl and supporting classes.
> The way this JIRA solves this problem is adding a new method
> publishMetricsNow() to the MetricsSystemImpl() class, that does a synchronous
> out-of-band push of the metrics from the sources to the sink. I also add a
> method to MetricsSinkAdapter (putMetricsImmediate) to support that change.
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