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https://issues.apache.org/jira/browse/SOLR-10742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16086268#comment-16086268
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Erick Erickson commented on SOLR-10742:
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Since this is a r/o iteration of the lists, and since the central problem is
that other core operations cannot proceed due to the synchronization, one
suggestion is to take this traversal out of the synchronized block and either
retry on ConcurrentModificationExceptions or just return whatever list has been
accumulated to date.
Opinions?
> SolrCores.getNamesForCore is quite inefficient and blocks other core
> operations
> -------------------------------------------------------------------------------
>
> Key: SOLR-10742
> URL: https://issues.apache.org/jira/browse/SOLR-10742
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Erick Erickson
> Assignee: Erick Erickson
>
> SolrCores.getNamesForCore iterates through all the cores to find all the
> aliases to this core. It does this in a synchronized block which blocks other
> core operations.
> For installations with many cores this can be a performance issue. I'm not
> sure it makes sense to do it this way anyway, perhaps SolrCore should have a
> list of its current aliases and we can be more efficient about this? Or
> otherwise get this information in a less heavy-weight fashion?
> I'm assigning this to myself to keep track of it, but anyone who wants to
> grab it please feel free.
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