[jira] [Updated] (AMBARI-18652) Alert Targets Cannot Be Updated Due To Transaction / Cache Timing Issues

["Jonathan Hurley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-18652?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Hurley updated AMBARI-18652:
-------------------------------------
    Attachment: AMBARI-18652.patch

> Alert Targets Cannot Be Updated Due To Transaction / Cache Timing Issues
> ------------------------------------------------------------------------
>
>                 Key: AMBARI-18652
>                 URL: https://issues.apache.org/jira/browse/AMBARI-18652
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 2.4.0
>            Reporter: Jonathan Hurley
>            Assignee: Jonathan Hurley
>            Priority: Critical
>             Fix For: 2.5.0
>
>         Attachments: AMBARI-18652.patch
>
>
> There is a JPA timing issue WRT to updating alert targets where lazy loaded lists outside of a transaction cause the data set on the {{AlertTargetEnity}} to be refreshed from the database.
> While maintaining the bi-directional relationship between {{AlertTargetEntity}} and {{AlertGroupEntity}}, and {{IndirectSet}} from JPA causes JPA to detect a stale entity from another transaction. 
> STR:
> It's more likely to happen when there are active alerts.
> - Create a new alert target for _just_ HDFS
> - Shut down HDFS
> - Try to edit the name of the alert target
> It will return a 200 return code, but the data will not have changed.



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