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https://issues.apache.org/jira/browse/LUCENE-3711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13189503#comment-13189503
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Yonik Seeley commented on LUCENE-3711:
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Martijn brought this to my attention, and I committed a fix + test to trunk.
But via IRC:
[16:46] <yonik_> mvg: is there anything in a released version of Lucene/Solr
that uses SentinelIntSet in a way that causes it to resize?
[16:47] <yonik_> if not, no CHANGES entry needed...
[16:48] <mvg> Yes in the TermAllGroupsCollector and in some impl of
TermAllGroupHeadsCollector
[16:49] <mvg> Both collectors can take an initial size.
[16:49] <mvg> The SentinelIntSet can grow in these collectors.
The default on those collectors is 128, so most likely no one was bit (i.e.
they would need to override that default), but we should add a CHANGES entry
and backport to 3x.
> small SentinelIntSet can cause infinite loop on resize
> ------------------------------------------------------
>
> Key: LUCENE-3711
> URL: https://issues.apache.org/jira/browse/LUCENE-3711
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Yonik Seeley
> Priority: Minor
>
> A small initial size of <=4 can cause the set to not rehash soon enough and
> thus go into an infinite loop searching the table for an open space.
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