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https://issues.apache.org/jira/browse/SOLR-5747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13906482#comment-13906482
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Shawn Heisey commented on SOLR-5747:
------------------------------------

This would be a nice feature, but making it happen by default seems like a bad 
idea to me.  It would result in a considerable change to Solr's default 
behavior.  If we make it configurable and don't turn it on by default, I think 
it would be nice to have.

Right now you can make a change to your config in zookeeper, and it won't take 
effect until you CHOOSE to make it take effect, by reloading manually.  If you 
have several thousand collections all using the same config, you definitely 
don't want thousands of cores to reload, even if it were to happen one-by-one 
instead of all at once.


> Update the config need manual restart the cluster server.
> ---------------------------------------------------------
>
>                 Key: SOLR-5747
>                 URL: https://issues.apache.org/jira/browse/SOLR-5747
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud
>    Affects Versions: 4.5, 4.5.1, 4.6, 4.6.1
>         Environment: linux, solr cloud
>            Reporter: Raintung Li
>              Labels: collection, config
>         Attachments: patch-5747
>
>
> Many collections bundle one config. If I update the config, I need manual 
> reload the collection one by one.
> Could monitor config for every collection. If update the config, the monitor 
> will notify and automatic reload collection for every solr core.
>  



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