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Posted to dev@lucene.apache.org by "Mike Drob (JIRA)" <ji...@apache.org> on 2019/02/01 22:13:00 UTC
[jira] [Commented] (SOLR-13190) Fuzzy search treated as server
error instead of client error when terms are too complex
[ https://issues.apache.org/jira/browse/SOLR-13190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758713#comment-16758713 ]
Mike Drob commented on SOLR-13190:
----------------------------------
[~mikemccand] - WDYT? You were the original person to add this exception in LUCENE-6046, not sure if you knew that it was also affecting Fuzzy terms as well when planning for direct regex construction.
> Fuzzy search treated as server error instead of client error when terms are too complex
> ---------------------------------------------------------------------------------------
>
> Key: SOLR-13190
> URL: https://issues.apache.org/jira/browse/SOLR-13190
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: search
> Affects Versions: master (9.0)
> Reporter: Mike Drob
> Assignee: Mike Drob
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> We've seen a fuzzy search end up breaking the automaton and getting reported as a server error. This usage should be improved by
> 1) reporting as a client error, because it's similar to something like too many boolean clauses queries in how an operator should deal with it
> 2) report what field is causing the error, since that currently must be deduced from adjacent query logs and can be difficult if there are multiple terms in the search
> This trigger was added to defend against adversarial regex but somehow hits fuzzy terms as well, I don't understand enough about the automaton mechanisms to really know how to approach a fix there, but improving the operability is a good first step.
> relevant stack trace:
> {noformat}
> org.apache.lucene.util.automaton.TooComplexToDeterminizeException: Determinizing automaton with 13632 states and 21348 transitions would result in more than 10000 states.
> at org.apache.lucene.util.automaton.Operations.determinize(Operations.java:746)
> at org.apache.lucene.util.automaton.RunAutomaton.<init>(RunAutomaton.java:69)
> at org.apache.lucene.util.automaton.ByteRunAutomaton.<init>(ByteRunAutomaton.java:32)
> at org.apache.lucene.util.automaton.CompiledAutomaton.<init>(CompiledAutomaton.java:247)
> at org.apache.lucene.util.automaton.CompiledAutomaton.<init>(CompiledAutomaton.java:133)
> at org.apache.lucene.search.FuzzyTermsEnum.<init>(FuzzyTermsEnum.java:143)
> at org.apache.lucene.search.FuzzyQuery.getTermsEnum(FuzzyQuery.java:154)
> at org.apache.lucene.search.MultiTermQuery$RewriteMethod.getTermsEnum(MultiTermQuery.java:78)
> at org.apache.lucene.search.TermCollectingRewrite.collectTerms(TermCollectingRewrite.java:58)
> at org.apache.lucene.search.TopTermsRewrite.rewrite(TopTermsRewrite.java:67)
> at org.apache.lucene.search.MultiTermQuery.rewrite(MultiTermQuery.java:310)
> at org.apache.lucene.search.IndexSearcher.rewrite(IndexSearcher.java:667)
> at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:442)
> at org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:200)
> at org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1604)
> at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1420)
> at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:567)
> at org.apache.solr.handler.component.QueryComponent.doProcessUngroupedSearch(QueryComponent.java:1435)
> at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:374)
> at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:298)
> at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:2559)
> {noformat}
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