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From "Dmitry Lysnichenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-4320) Add separate CONFIGURE command support to server
Date Mon, 17 Feb 2014 20:37:19 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-4320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13903491#comment-13903491
] 

Dmitry Lysnichenko commented on AMBARI-4320:
--------------------------------------------

[~mahadev]/[~sumitmohanty], I've talked to [~dsen] regarding his work on RESTART command (ticket
name is "Actual configs not updated after restart of host component"). Looks like he is working
on the opposite conception.

Implementation proposal that has been agreed in current jira specifies that we remove explicit
configure() calls from the python code and generate CONFIGURE command for every START command
being issued.

Proposal posted at Dmytro's jira specifies that RESTART command calls start() method and invokes
before-START hooks. Either start() method or hooks contain implicit configure() call and that
is how configuration is performed.

Need some unified requirements here. Probably it makes sense to leave explicit configure()
calls as is and never have to issue a separate CONFIGURE command (go the Dmytro's way). Or
agent may compare saved and current config-tags on every START/RESTART command and perform
reconfiguration if needed.

> Add separate CONFIGURE command support to server
> ------------------------------------------------
>
>                 Key: AMBARI-4320
>                 URL: https://issues.apache.org/jira/browse/AMBARI-4320
>             Project: Ambari
>          Issue Type: Improvement
>          Components: controller
>    Affects Versions: 1.5.0
>            Reporter: Dmitry Lysnichenko
>            Assignee: Dmitry Lysnichenko
>             Fix For: 1.5.0
>
>
> CONFIGURE command is responsible for creating files/dirs, adjusting ownership, generating
config files etc.



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