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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13035) Add states INITING and STARTING to YARN Service model to cover in-transition states.
Date Sun, 01 May 2016 17:25:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15265840#comment-15265840
] 

Steve Loughran commented on HADOOP-13035:
-----------------------------------------

Linking to the outstanding patches which make significant uses of YARN services: an entry
point to start any service and some basic lifecycle services alongside the CompositeService.


> Add states INITING and STARTING to YARN Service model to cover in-transition states.
> ------------------------------------------------------------------------------------
>
>                 Key: HADOOP-13035
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13035
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Bibin A Chundatt
>         Attachments: 0001-HADOOP-13035.patch, 0002-HADOOP-13035.patch, 0003-HADOOP-13035.patch
>
>
> As per the discussion in YARN-3971 the we should be setting the service state to STARTED
only after serviceStart() 
> Currently {{AbstractService#start()}} is set
> {noformat} 
>      if (stateModel.enterState(STATE.STARTED) != STATE.STARTED) {
>         try {
>           startTime = System.currentTimeMillis();
>           serviceStart();
> ..
>  }
> {noformat}
> enterState sets the service state to proposed state. So in {{service.getServiceState}}
in {{serviceStart()}} will return STARTED .



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