[jira] [Commented] (SLING-5965) Metrics and a Health-Check for Scheduler to detect long-running Quartz-Jobs

["Carsten Ziegeler (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SLING-5965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15986187#comment-15986187 ] 

Carsten Ziegeler commented on SLING-5965:
-----------------------------------------

[~egli] Just realized that I never got back to this :(
As we have now split up the HC api from the core, I think it's fine to have the HC in the commons scheduler bundle. It would be good if we can make the import optional: scheduler runs without a HC if no HC api is available

> Metrics and a Health-Check for Scheduler to detect long-running Quartz-Jobs
> ---------------------------------------------------------------------------
>
>                 Key: SLING-5965
>                 URL: https://issues.apache.org/jira/browse/SLING-5965
>             Project: Sling
>          Issue Type: New Feature
>          Components: Commons
>    Affects Versions: Commons Scheduler 2.5.0
>            Reporter: Stefan Egli
>             Fix For: Commons Scheduler 2.5.4
>
>         Attachments: SLING-5965.patch, SLING-5965.v2.patch.txt
>
>
> Sling Scheduler jobs (aka Quartz-Jobs) should typically be fast running jobs. They are served from a thread-pool and should occupy that thread only for a short amount of time.
> If there are 'misbehaving' quartz-jobs that run for a very long time, they start to occupy threads from that thread-pool, thus have an influence on the performance of other scheduled/quartz-jobs.
> We should have metrics (using [sling.commons.metrics|https://sling.apache.org/documentation/bundles/metrics.html]) that provide information about internas of Sling Scheduler, such as average, max etc duration of scheduled jobs, as well as how many jobs are currently running and since when was the oldest job running.
> Based on this, a Health-Check can monitor the 'oldest job running' metric and flag {{critical}} when eg the oldest job is older than {{60'000ms}} (configurable, default).



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