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https://issues.apache.org/jira/browse/LUCENE-1726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730009#action_12730009
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Jason Rutherglen commented on LUCENE-1726:
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{quote}try inserting a testPoint (see the other testPoints in
IndexWriter) after the SRMapValue is pulled from the hash but before
we check if its reader is null{quote}
I added the test point, but tested without the yield, the method
itself was enough of a delay to expose the exception.
> IndexWriter.readerPool create new segmentReader outside of sync block
> ---------------------------------------------------------------------
>
> Key: LUCENE-1726
> URL: https://issues.apache.org/jira/browse/LUCENE-1726
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 2.4.1
> Reporter: Jason Rutherglen
> Assignee: Michael McCandless
> Priority: Trivial
> Fix For: 3.1
>
> Attachments: LUCENE-1726.patch, LUCENE-1726.patch, LUCENE-1726.patch,
> LUCENE-1726.patch, LUCENE-1726.patch, LUCENE-1726.patch,
> LUCENE-1726.trunk.test.patch
>
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> I think we will want to do something like what field cache does
> with CreationPlaceholder for IndexWriter.readerPool. Otherwise
> we have the (I think somewhat problematic) issue of all other
> readerPool.get* methods waiting for an SR to warm.
> It would be good to implement this for 2.9.
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