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https://issues.apache.org/jira/browse/USERGRID-1283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15276919#comment-15276919
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David Johnson commented on USERGRID-1283:
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One idea for moving the management app lookup to an earlier step in the process:
1) in the CpEntityMangementFactory constructor, call the (existing) method
initMgmtAppInternal()
2) In initMgmtAppInternal() add retry logic to retry when it cannot fetch the
management application. If every retry fails, then throw a RuntimeException,
which should prevent Usergrid from deploying to Tomcat
3) Add a management app field in CpEntitymanagementFactory and a getter that
keeps that field up to date, and returns that field value whenever it cannot
look up the management app from Cassandra
> Improve ServiceManager.init() start-up logic
> --------------------------------------------
>
> Key: USERGRID-1283
> URL: https://issues.apache.org/jira/browse/USERGRID-1283
> Project: Usergrid
> Issue Type: Improvement
> Reporter: David Johnson
>
> Sometimes on Usergrid startup there is a failure contacting Cassandra, either
> an immediate communications failure or a time-out.
> In some cases when this happens, the ServiceManager.init() method cannot
> retrieve the internal Management Application that holds information about
> Usergrid orgs, app and admin users.
> We added some retry logic to the ServiceManager.init() method, which is not
> an ideal fix because that method is also invoked in processing of HTTP
> requests. Problem is, if the the retries do not work we end up with an
> instance of Usergrid that is alive and able to respond to /status requests,
> but everything else fails.
> We should fix this by:
> 1) Moving the Management App lookup (and retry logic) to a much earlier point
> in the startup process.
> 2) Caching the Management App in some place where all threads can get it.
> This cache should never be allowed to be null. We always need to be able to
> fall back to a recent version of the Management App
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