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From Daniel Gómez Ferro (JIRA) <j...@apache.org>
Subject [jira] [Commented] (S4-74) NullPointerException on TCPEmitter.onChange()
Date Fri, 13 Jul 2012 13:09:34 GMT

    [ https://issues.apache.org/jira/browse/S4-74?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13413704#comment-13413704
] 

Daniel Gómez Ferro commented on S4-74:
--------------------------------------

This fixed the original problem, thanks a lot!
                
> NullPointerException on TCPEmitter.onChange() 
> ----------------------------------------------
>
>                 Key: S4-74
>                 URL: https://issues.apache.org/jira/browse/S4-74
>             Project: Apache S4
>          Issue Type: Bug
>    Affects Versions: 0.5
>            Reporter: Daniel Gómez Ferro
>            Assignee: Matthieu Morel
>             Fix For: 0.5
>
>
> TCPEmitter is registering itself as a listener in its constructor: {{this.topology.addListener(this);}}
> The topology is triggering a refresh before the TCPEmitter is fully constructed, so TCPEmitter.partitionNodeMap
is still null during onChange() execution.
> TCPEmitter shouldn't register itself as a listener until it's fully built, see http://www.ibm.com/developerworks/java/library/j-jtp0618/index.html#2
(Don't publish the "this" reference during construction)

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