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https://issues.apache.org/jira/browse/SOLR-2462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13043018#comment-13043018
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James Dyer commented on SOLR-2462:
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Robert,
I'm not sure we can do this last suggestion. If as the queue grows we poll(),
we will in fact be discarding all of the best (lowest-ranked) suggestions.
What we would need to do is insert the 21st element, letting it fall into its
place in order, and then we'd need an operation to remove the _worst_
suggestion from the tail of the queue. Looking at PriorityQueue's API docs I'm
not sure there is a method exposed that does that.
Did I miss something here?
> 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.patch,
> 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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