David Smiley created SOLR-17612:
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Summary: spellcheck.maxResultsForSuggest percentage is flawed when
multiple shards
Key: SOLR-17612
URL: https://issues.apache.org/jira/browse/SOLR-17612
Project: Solr
Issue Type: Bug
Components: spellchecker
Affects Versions: 5.5
Reporter: David Smiley
The {{spellcheck.maxResultsForSuggest}} param can be a fraction. When it is a
fraction, the code {{SpellcheckComponent.maxResultsForSuggest()}} will open the
Searcher of the current core to evaluate a query against local data. The
details of this don't matter but this code is executed on the coordinator core
of the query in distributed search because it's called by
{{{}org.apache.solr.handler.component.SpellCheckComponent#finishStage{}}}.
This core could be empty (when using a coordinator node feature) or may simply
not be represenatiative. The ramification is that the internal boolean
isCorrectlySpelled would always be true (assuming no local data) and not get
the spell correction it should have gotten with an accurate threshold.
_Credit to my colleague_ [~pvcnt]{_}. We tend to think there's a design flaw
in Solr distributed search that permits a coordinator to get a Searcher from a
request that should be blocked, catching a bug like this early.{_}
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