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https://issues.apache.org/jira/browse/SOLR-915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656696#action_12656696
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Ryan McKinley commented on SOLR-915:
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I see -- so this becomes important when you have many cores and the code in
hook.close( this ) takes a while.
Behavior wise, we should make sure that core.close() does not return until all
the closeHooks are finished.
Can you submit a patch with your fix?
> SolrCore;close() - scope to exploit parallelism among the number of
> closeHooks
> --------------------------------------------------------------------------------
>
> Key: SOLR-915
> URL: https://issues.apache.org/jira/browse/SOLR-915
> Project: Solr
> Issue Type: Improvement
> Environment: Tomcat 6, JRE 6
> Reporter: Kay Kay
> Original Estimate: 96h
> Remaining Estimate: 96h
>
> In SolrCore: close() - all the way towards the end of the function - there
> seems to be a sequential list of close method invocation.
> if( closeHooks != null ) {
> for( CloseHook hook : closeHooks ) {
> hook.close( this );
> }
> }
> I believe this has scope to be parallelized ( actually the entire sequence of
> close operations , updateHandler,close() etc.) - by means of launching them
> in separate threads from an ExecutorService , for a much faster shutdown as
> the process definitely does not need to be sequential.
> This becomes all the more important in the multi-core context when we might
> want to shutdown and restart a SolrCore altogether.
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