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https://issues.apache.org/jira/browse/SOLR-9577?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15535425#comment-15535425
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Noble Paul commented on SOLR-9577:
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There is another issue with reload. component 1 may rely on component 3 and 4.
So, component 1 should be notified of changes happened in other components.
for example, a searchhandler instance refers to SearchComponents. If the config
api modifies a searchcomponent, every {{Reloadable}} component must be
notified after the reload is complete. I'm adding another the method to the
interface
> SolrConfig edit operations should not need to reload core
> ---------------------------------------------------------
>
> Key: SOLR-9577
> URL: https://issues.apache.org/jira/browse/SOLR-9577
> Project: Solr
> Issue Type: Sub-task
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Noble Paul
>
> Every single change done to solrconfig.xml/configoverlay.json leads to a core
> reload. This is very bad for performance.
> Ideally , If I update/add/delete a component only that one component needs to
> get reloaded.
> How to do this?
> Every component in Solr should be able to implement an interface
> {code:java}
> interface Reloadable {
> void reload(PluginInfo info);
> }
> {code}
> if the component implements this interface, any change to its configuration
> will result in a callback to this method.
> if the component does not implement this interface, we should unload and the
> component and call any close hooks registered from the inform() method . To
> make this work, we will have to disable registering close hooks from anywhere
> else. After unloading the component, a new one created with the new
> configuration
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