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https://issues.apache.org/jira/browse/FELIX-6097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Georg Henzler resolved FELIX-6097.
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Resolution: Fixed
Fixed in
* [r1858499|http://svn.apache.org/r1858499] boolean config property
avoid404DuringStartup that will ensure a servlet is registered
* [r1858500|http://svn.apache.org/r1858500] return 503 also for the case no hc
services for configured tags are available (yet)
> Improve startup behaviour of ServiceUnavailableFilter for low start levels
> --------------------------------------------------------------------------
>
> Key: FELIX-6097
> URL: https://issues.apache.org/jira/browse/FELIX-6097
> Project: Felix
> Issue Type: Improvement
> Components: Health Checks
> Affects Versions: healthcheck.core 2.0.2
> Reporter: Georg Henzler
> Assignee: Georg Henzler
> Priority: Major
>
> After some analysis and after comparing with the sling mechanism at [1], it
> turns out that if a filter is registered to the http whiteboard, it only
> becomes active if there is actually a servlet to answer the request
> (otherwise the filter will never kick in and the request just return 404).
> In a setup that uses a product that registers the http whiteboard at start
> level 5 and the product servlets at start level 20, the current version of
> ServiceUnavailableFilter only kicks in at start level 20 once the product
> servlets become active when it should really already return 503 during
> startup start levels 5-19. Although the 404 response code is usually treated
> equally by machine clients (load balancers, kubernetes probles) it is still
> not semantically correct, hence this shall be improved to use the mechanism
> of [1].
> [1]
> https://github.com/apache/sling-org-apache-sling-starter-startup/blob/f9f9496588e335d7bdee0246abff5fb22051809f/src/main/java/org/apache/sling/starter/startup/impl/HttpStartupSetup.java#L61
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