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https://issues.apache.org/jira/browse/SOLR-509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12593960#action_12593960
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Koji Sekiguchi commented on SOLR-509:
-------------------------------------

I confirmed the fix. I like the second patch (uses a latch version). Thanks 
Yonik to solve this problem!

> Event Listeners called before request handlers are informed of SolrCore
> -----------------------------------------------------------------------
>
>                 Key: SOLR-509
>                 URL: https://issues.apache.org/jira/browse/SOLR-509
>             Project: Solr
>          Issue Type: Bug
>          Components: search
>            Reporter: Hoss Man
>            Assignee: Grant Ingersoll
>             Fix For: 1.3
>
>         Attachments: SOLR-509-fix.patch, SOLR-509-fix.patch, SOLR-509.patch, 
> SOLR-509.patch
>
>
> http://www.nabble.com/Nullpointer-when-using-QuerySenderListener-to16201207.html
> Thijs noticed NullPointerException from SearchHandler on startup when trying 
> to configure some firstSearcher events using QuerySenderListener.
> The problem is the events are getting triggered as soon as the firstSearcher 
> is opened, but the SOlrCore isn't finished being initialized, so 
> inform(SolrCore) hasn't been called on all the Handlers (and some handlers 
> aren't fully initialized and ready to process requests yet.
> We need to more the firstSearcher event handling after inform has been called 
> on all SolrCoreAware objects.

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