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https://issues.apache.org/jira/browse/AMBARI-2934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aleksandr Kovalenko updated AMBARI-2934:
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Attachment: AMBARI-2934.patch
> NameNode HA Wizard: hardening
> -----------------------------
>
> Key: AMBARI-2934
> URL: https://issues.apache.org/jira/browse/AMBARI-2934
> Project: Ambari
> Issue Type: Task
> Components: client
> Affects Versions: 1.4.0
> Reporter: Aleksandr Kovalenko
> Assignee: Aleksandr Kovalenko
> Fix For: 1.4.0
>
> Attachments: AMBARI-2934.patch
>
>
> Assume that every API call can fail. We need a reliable error handling and
> retry mechanism. Upon an API call failure, we let the user retry the last
> task that failed.
> Page refreshes need to be handled. At any point in time, the user should be
> able to hit refresh and not cause adverse affects.
> Checkpoint at appropriate points using the "persist" call, so that we know
> what API calls have been executed already and we don't call them again.
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