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From "Christian Schneider (JIRA)" <>
Subject [jira] [Updated] (ARIES-1817) Export remove do not always end up in REMOVE events (timing issue)
Date Thu, 18 Oct 2018 16:08:02 GMT


Christian Schneider updated ARIES-1817:
    Summary: Export remove do not always end up in REMOVE events (timing issue)  (was: Export
remove do no always end up in REMOVE events (timing issue))

> Export remove do not always end up in REMOVE events (timing issue)
> ------------------------------------------------------------------
>                 Key: ARIES-1817
>                 URL:
>             Project: Aries
>          Issue Type: Bug
>          Components: Remote Service Admin
>    Affects Versions: rsa-1.12.0
>            Reporter: Mark Hoffmann
>            Assignee: Christian Schneider
>            Priority: Major
>             Fix For: rsa-1.13.0
>         Attachments: ServiceExportsRepository.patch
> During testing aries RSA I found several situations where my discovery did not received
a remove event. After some inspection I found that
> org.apache.aries.rsa.core.ExportRegistrationImpl#getExportReference returns only the
reference instance when its not closed, otherwise null.
> Usually I expected that the ExportRegistration is closed by the TopologyManager, in this
case org.apache.aries.rsa.topologymanager.exporter.ServiceExportRepository. But thats not
true. While debugging I saw that sometimes org.apache.aries.rsa.core.RemoteServiceAdminCore#removeServiceExports
closes the ExportRegistration a little bit earlier. That leads to a null ExportReference instance
in ServiceExportRepository#closeReg, which in return leads to no remove event.
> So, there is no single point of truth, who closes the ExportRegistration. Citing the
Spec 122.5.1:
> _The Export Registrations remain open until:_
> _Explicitly closed by the Topology Manager, or_
> _The Remote Service Admin service is no longer used by the Topology Manager that created
the Export Registration._
> _If the Remote Service Admin service can no longer maintain the corresponding Endpoint
due to failures than these should be reported through the events. However, the registrations
should remain open until explicitly closed by the Topology Manager._
> I attached a patch, that solve the problem, but is as well not compliant to the spec,
like the current implementation.

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