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https://issues.apache.org/jira/browse/SOLR-7667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14587488#comment-14587488
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Erick Erickson commented on SOLR-7667:
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I can reproduce this on 4.10, but not on 5x or trunk. Part of deprecating the
old solr.xml format where cores were defined in solr.xml involved lots of
simplification in the whole core loading/discovery process. I suspect that this
problem went away with that simplification, although I also think this was
serendipitous.
I'll attached a test case that fails in 4.10 and succeeds in both 5x and trunk
and I'll change the "affected versions" to 4.10.3 (I suspect this has been
around forever so probably affects releases much earlier than 4.10). The
"failure mode" in these tests is it hangs forever, which is what I believe
you're reporting.
There are really no plans to release any new 4.10 versions at present, and this
the first report of this. So I'm afraid there's little chance of releasing a
fix specifically for 4.10 and it's unnecessary (apparently) for 5.x+
So if you really need this, I think you'll have to patch it locally I'm afraid.
> If more cores are loaded at startup than the transient core size, cores
> become unavailable.
> -------------------------------------------------------------------------------------------
>
> Key: SOLR-7667
> URL: https://issues.apache.org/jira/browse/SOLR-7667
> Project: Solr
> Issue Type: Bug
> Affects Versions: 5.2.1, Trunk
> Reporter: Erick Erickson
> Assignee: Erick Erickson
> Attachments: CoreContainer.java,
> SOLR-7667-with-CoreAdmin-create-fail.patch,
> SOLR-7667-with-CoreAdmin-create-fail.patch, SOLR-7667.patch, SOLR-7667.patch
>
>
> Edwin Lee from the user's list caught this, the original post is titled
> "loadOnStartup & transientCoreSize & BUG Report on CoreContainer.java"
> Nice catch Edwin!
> More details to follow:
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