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https://issues.apache.org/jira/browse/SOLR-6297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Dyer updated SOLR-6297:
-----------------------------

    Attachment: SOLR-6297.patch

Here is a patch with a failing unit test.  Note that when a word-break 
suggestion comes solely from 1 shard, it is the "suggestions" section that is 
left off the response.  The suggestion is still there and it is properly used 
for collations.

> Distributed spellcheck with WordBreakSpellchecker can lose suggestions
> ----------------------------------------------------------------------
>
>                 Key: SOLR-6297
>                 URL: https://issues.apache.org/jira/browse/SOLR-6297
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 4.9
>            Reporter: Steve Molloy
>         Attachments: SOLR-6297.patch
>
>
> When performing a spellcheck request in distributed environment with the 
> WordBreakSpellChecker configured, the shard response merging logic can lose 
> some suggestions. Basically, the merging logic ensures that all shards marked 
> the query as not being correctly spelled, which is good, but also expects all 
> shards to return some suggestions, which isn't necessarily the case. So if 
> shard 1 returns 10 suggestions but shard 2 returns none, the final result 
> will contain no suggestions because the term has suggestions from only 1 of 2 
> shards.
> This isn't the case with the DirectSolrSpellChecker which works properly.



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