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From "Tuong Truong (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (AMBARI-12640) Restarting of services does not observe intra-service dependency
Date Thu, 19 Nov 2015 02:53:11 GMT

     [ https://issues.apache.org/jira/browse/AMBARI-12640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tuong Truong resolved AMBARI-12640.
-----------------------------------
       Resolution: Duplicate
    Fix Version/s: 2.1.1

> Restarting of services does not observe intra-service dependency
> ----------------------------------------------------------------
>
>                 Key: AMBARI-12640
>                 URL: https://issues.apache.org/jira/browse/AMBARI-12640
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>    Affects Versions: 1.7.0
>            Reporter: Tuong Truong
>            Assignee: Tuong Truong
>             Fix For: 2.1.1
>
>
> Currently, some services, such as Hive, manages sub subservice like database service.
  When starting a service, the order of the subservices are observed to ensure they start
properly.  However, for restarting of services,  the dependency order is not observed. 
> In the case of Hive, the restart sequence is:
> HCat Client, 
> Hive Client, 
> Hive Metastore (has dependency on mysql, but started before) 
> HiveServer2, 
> MySQL server, 
> WebHCat server
> So if Mysql Server is down, then the HIve restart sequence will fail.
> To recreate the problem, stop MySQL server, then restart Hive service.  One will see
that the Hive Metastore service will fail to start.



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