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https://issues.apache.org/jira/browse/SOLR-2462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042885#comment-13042885
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Robert Muir commented on SOLR-2462:
-----------------------------------
bq. 1. With a PriorityQueue, there is no simple way to get the 100th element
and find its rank to determine whether or not to add subsequent elements.
Hi James, you might consider using peek() here to check
as an example, you can take a look at the main loop of DirectSpellChecker:
suggestSimilar(Term, int, IndexReader, int, int, float, CharsRef)
http://svn.apache.org/repos/asf/lucene/dev/trunk/modules/suggest/src/java/org/apache/lucene/search/spell/DirectSpellChecker.java
> Using spellcheck.collate can result in extremely high memory usage
> ------------------------------------------------------------------
>
> Key: SOLR-2462
> URL: https://issues.apache.org/jira/browse/SOLR-2462
> Project: Solr
> Issue Type: Bug
> Components: spellchecker
> Affects Versions: 3.1
> Reporter: James Dyer
> Priority: Critical
> Fix For: 3.1.1, 4.0
>
> Attachments: SOLR-2462.patch, SOLR-2462.patch, SOLR-2462_3_1.patch
>
>
> When using "spellcheck.collate", class SpellPossibilityIterator creates a
> ranked list of *every* possible correction combination. But if returning
> several corrections per term, and if several words are misspelled, the
> existing algorithm uses a huge amount of memory.
> This bug was introduced with SOLR-2010. However, it is triggered anytime
> "spellcheck.collate" is used. It is not necessary to use any features that
> were added with SOLR-2010.
> We were in Production with Solr for 1 1/2 days and this bug started taking
> our Solr servers down with "infinite" GC loops. It was pretty easy for this
> to happen as occasionally a user will accidently paste the URL into the
> Search box on our app. This URL results in a search with ~12 misspelled
> words. We have "spellcheck.count" set to 15.
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