[jira] [Updated] (OOZIE-3132) Instrument SLACalculatorMemory

["Andras Piros (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OOZIE-3132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andras Piros updated OOZIE-3132:
--------------------------------
    Summary: Instrument SLACalculatorMemory  (was: Instrument SLAService and SLACalculatorMemory)

> Instrument SLACalculatorMemory
> ------------------------------
>
>                 Key: OOZIE-3132
>                 URL: https://issues.apache.org/jira/browse/OOZIE-3132
>             Project: Oozie
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 4.3.0
>            Reporter: Andras Piros
>            Assignee: Andras Piros
>             Fix For: 5.0.0b1
>
>
> When there are lots of {{WorkflowJobBean}} and {{CoordinatorJobBean}} instances that have to be followed up on creating {{SLASummaryBean}} instances, following can occur:
> * we set {{oozie.sla.service.SLAService.capacity}} to a sane value like {{10000}} to preserve heap consumption
> * {{SLACalculatorMemory#addRegistration()}} and {{SLACalculatorMemory#updateRegistration}} would:
> ** either emit {{TRACE}} level logs like {{SLA Registration Event - Job:}} showing the add / update of {{SLARegistrationBean}} was successful
> ** or emit {{ERROR}} level logs like {{SLACalculator memory capacity reached. Cannot add or update new SLA Registration entry for job}} showing the add / update of {{SLARegistrationBean}} was not successful
> Since sometimes stale or already processed {{SLAEvent}} entries from {{SLACalculatorMemory#slaMap}} get removed, it's pretty hard to say what is its the actual size - that is, whether the next add or update command will succeed
> We need an {{Instrumentation.Counter}} instance that gets incremented when there is an {{SLACalculatorMemory#slaMap#put()}} with a new entry added, and gets decremented when there happens a {{SLACalculatorMemory#slaMap#remove()}} with an existing entry removed. This counter will be automatically present within REST interface, and Oozie client.



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