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https://issues.apache.org/jira/browse/TEZ-1547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14190491#comment-14190491
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Siddharth Seth commented on TEZ-1547:
-------------------------------------
Scratch that; I see how this can happen.
{code}
srcVertexConfigured.put(srcVertex, false);
getContext().registerForVertexStateUpdates(srcVertex,
EnumSet.of(VertexState.COMPLETELY_CONFIGURED));
{code}
The registration right after adding to the map, will cause the
StateChangeNotifier to make a synchronous call back notifying of the
vertexStateUpdated, if the src vertex has already started.
> Make use of state change notifier in VertexManagerPlugins
> ---------------------------------------------------------
>
> Key: TEZ-1547
> URL: https://issues.apache.org/jira/browse/TEZ-1547
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Siddharth Seth
> Assignee: Bikas Saha
> Attachments: TEZ-1547.1.patch, TEZ-1547.3.patch, TEZ-1547.4.patch,
> TEZ-1547.5.patch, TEZ-1547.6.patch, TEZ-1547.7.patch
>
>
> Instead of the various APIs like onVertexStarted, simple notifications could
> be sent.
> Some existing APIs could end up being deprecated.
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