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https://issues.apache.org/jira/browse/HADOOP-13035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15278860#comment-15278860
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Steve Loughran commented on HADOOP-13035:
-----------------------------------------
If we only care about a service saying whether it considers itself "live', then
extening the Service interface with a ServiceWithLiveness one would let
services set a bit when they considered themselves live. We could also have a
standard "wait until live" mechanism (busy wait? Block on an object?) so that
one thread could wait until another one felt that it was fully up and running...
> 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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