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https://issues.apache.org/jira/browse/SOLR-14342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17068246#comment-17068246
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ASF subversion and git services commented on SOLR-14342:
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Commit 2ba905741bc65146c99e3e4d74c75084709beeb2 in lucene-solr's branch
refs/heads/branch_8x from David Smiley
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=2ba9057 ]
SOLR-14342: Improve core loading order in SolrCloud.
Makes collections available sooner and reduces leaderVoteWait timeouts in large
SolrCloud clusters.
This fixes a previous attempt to do this.
Fixes #1366
(cherry picked from commit a0b0c710b550ad6475740af52cec2eb4a4522d46)
> CoreSorter is partially broken, thus core loading order is sub-optimal
> ----------------------------------------------------------------------
>
> Key: SOLR-14342
> URL: https://issues.apache.org/jira/browse/SOLR-14342
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Major
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> In SOLR-7280, it Solr was supposedly improved to load cores in a more optimal
> order in SolrCloud, considering the state of collections across the cluster.
> The CoreContainer uses CoreSorter for this. Unfortunately, CoreSorter's
> attempts to gather statistics early on in CoreSorter.init() operate on an
> empty list and do nothing (i.e. dead code). The root cause is that
> getCloudDescriptors() works by looking at cc.getCores however at this stage
> _there are no cores_ ! (We haven't sorted them so they certainly haven't been
> loaded yet. I have a fix.
> This might be classified as a bug fix but the core load order is more about
> optimization, so a fix to a wrong/incomplete optimization isn't really a bug
> from a user's point of view.
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