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https://issues.apache.org/jira/browse/SLING-2968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13715201#comment-13715201
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Stefan Egli commented on SLING-2968:
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The suggested solution is to delay the DiscoveryServiceImpl's activate() until
the StartupListener.startupFinished() has been called.
This would imply that TOPOLOGY_INIT would also be delayed until the startup has
been finished. Which might not be a bad idea anyway..
> DiscoveryServiceImpl can make HTTP calls before Sling is properly started up
> ----------------------------------------------------------------------------
>
> Key: SLING-2968
> URL: https://issues.apache.org/jira/browse/SLING-2968
> Project: Sling
> Issue Type: Bug
> Components: Extensions
> Reporter: Robert Munteanu
> Assignee: Stefan Egli
> Priority: Minor
>
> If the DiscoveryServiceImpl starts up before the application is completely
> initalized, the first requests fail:
> {code}03.07.2013 14:24:43.821 *ERROR* [127.0.0.1 [1372850683817] PUT
> /libs/sling/topology/connector.40a70c95-c7de-4aea-bfdb-419f6329102b.json
> HTTP/1.1] org.apache.sling.engine.impl.SlingRequestProcessorImpl
> ServletResolver service missing, cannot service requests , sending status 503
> 03.07.2013 14:24:43.908 *ERROR* [127.0.0.1 [1372850683908] PUT
> /libs/sling/topology/connector.40a70c95-c7de-4aea-bfdb-419f6329102b.json
> HTTP/1.1] org.apache.sling.engine.impl.SlingRequestProcessorImpl
> ServletResolver service missing, cannot service requests , sending status 503
> 03.07.2013 14:24:43.996 *ERROR* [127.0.0.1 [1372850683996] PUT
> /libs/sling/topology/connector.40a70c95-c7de-4aea-bfdb-419f6329102b.json
> HTTP/1.1] org.apache.sling.engine.impl.SlingRequestProcessorImpl
> ServletResolver service missing, cannot service requests , sending status 503
> 03.07.2013 14:24:44.258 *ERROR* [127.0.0.1 [1372850684258] PUT
> /libs/sling/topology/connector.40a70c95-c7de-4aea-bfdb-419f6329102b.json
> HTTP/1.1] org.apache.sling.engine.impl.SlingRequestProcessorImpl
> ServletResolver service missing, cannot service requests , sending status
> 503{code}
> The solution would be to call the initialization code from inside a
> {{StartupListener}}, rather than on component activation.
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