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From "Di Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-21161) Able to safe guard Ambari server against circular dependencies in role command order
Date Wed, 07 Jun 2017 16:28:18 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-21161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16041156#comment-16041156
] 

Di Li commented on AMBARI-21161:
--------------------------------

pushed to trunk as https://git-wip-us.apache.org/repos/asf?p=ambari.git;a=commit;h=acb2f9896e55db202f5b054565d09c0e598011ed

> Able to safe guard Ambari server against circular dependencies in role command order
> ------------------------------------------------------------------------------------
>
>                 Key: AMBARI-21161
>                 URL: https://issues.apache.org/jira/browse/AMBARI-21161
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: trunk
>            Reporter: Di Li
>            Assignee: Di Li
>            Priority: Critical
>             Fix For: trunk
>
>         Attachments: AMBARI-21161.patch, AMBARI-21161-v3.patch
>
>
> It is important to safe guard against cycle graphs, when Ambari supports mpacks, custom
services and service level role command order. Cycle graphs indicate circular dependencies
that can cause Ambari enter an infinite loop while building stages, causing Ambari server
to take up 100% CPU and large amount of memory.



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