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https://issues.apache.org/jira/browse/USERGRID-1283?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Johnson closed USERGRID-1283.
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Closed.
> Improve ServiceManager.init() start-up logic
> --------------------------------------------
>
> Key: USERGRID-1283
> URL: https://issues.apache.org/jira/browse/USERGRID-1283
> Project: Usergrid
> Issue Type: Improvement
> Affects Versions: 2.1.0
> Reporter: David Johnson
> Assignee: David Johnson
> Fix For: 2.1.1
>
>
> Sometimes during Usergrid operation there is a temporary problem connecting
> to Cassandra. This can cause some requests to fail (with HTTP 500) and cause
> bad values (e.g. EntityManagers with application = null) to be cached. If
> connectivity problems happen during startup, Usergrid may start but be unable
> to respond to requests without errors.
> Usergrid should be more resilient to such temporary connectivity problems:
> - Change startup to retry Cassandra until it becomes available
> - Cache a copy of the ManagementApp because its needed for almost request
> - Change cache to prevent caching of bad EntityManagers
> Test these scenarios:
> - case 1: startup with no Cassandra running
> - case 2: startup with Cassandra starting 30s after Usergrid starts
> - case 3: startup where Cassandra goes down after start of Lock Manager,
> but before EMF init
> - case 3.1: Cassandra comes back before max retries
> - case 3.2: Cassandra never comes back
> PR is ready for review here: https://github.com/apache/usergrid/pull/528
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