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https://issues.apache.org/jira/browse/SOLR-915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656437#action_12656437
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Noble Paul commented on SOLR-915:
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before exploring the possiblity of parallelizing some code can we explain the
problem statement?
In the entire codebase there are very few instances of closeHook usages. So the
problem is not as grave as you point out it to be
are we trying to solve an imaginary problem?
> 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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