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https://issues.apache.org/jira/browse/SOLR-161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12602038#action_12602038
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Mike Klaas commented on SOLR-161:
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> It is really a Lucene query parser bug, but it wouldn't hurt to do s/(.*)-/&/
> as a workaround. Assuming my ed(1) syntax is still > >fresh. Regardless, no
> query string should ever give a stack trace
This might be hard to guarantee. Already there are four issues details
specific ways that dismax that barf on input. A lot of the suggestions above
are of the form of detecting a specific failure mode and correcting it, which
does not guarantee that you will catch them all.
A robust way to do it is parse the query into an AST using a grammar in a way
that matches the query as well as possible (dropping the stuff that doesn't
fit). Unfortunately, this is duplicative of the lucene parsing logic, and it
would be nicer add a "relaxed" mode to lucene rather than pre-parsing the query.
(The reparse+reassemble method is what we use, btw. It is written in python
but it might be possible to translate to java.)
> Dangling dash causes stack trace
> --------------------------------
>
> Key: SOLR-161
> URL: https://issues.apache.org/jira/browse/SOLR-161
> Project: Solr
> Issue Type: Bug
> Components: search
> Affects Versions: 1.1.0
> Environment: Java 1.5, Tomcat 5.5.17, Fedora Core 4, Intel
> Reporter: Walter Underwood
>
> I'm running tests from our search logs, and we have a query that ends in a
> dash. That caused a stack trace.
> org.apache.lucene.queryParser.ParseException: Cannot parse 'digging for the
> truth -': Encountered "<EOF>" at line 1, column 23.
> Was expecting one of:
> "(" ...
> <QUOTED> ...
> <TERM> ...
> <PREFIXTERM> ...
> <WILDTERM> ...
> "[" ...
> "{" ...
> <NUMBER> ...
>
> at org.apache.lucene.queryParser.QueryParser.parse(QueryParser.java:127)
> at
> org.apache.solr.request.DisMaxRequestHandler.handleRequest(DisMaxRequestHandler.java:272)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:595)
> at org.apache.solr.servlet.SolrServlet.doGet(SolrServlet.java:92)
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