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https://issues.apache.org/jira/browse/SOLR-5205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13841846#comment-13841846
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Bill Mitchell commented on SOLR-5205:
-------------------------------------
I missed that this Jira had already been opened when I created SOLR-5521.
I tried the approach of changing the TermQuery.toString method, seen in the
attached SOLR-5205.patch, and had it fail other tests, so I abandoned that
approach and went with escaping the term text directly in the
MoreLikeThisHandler, as was done in the attached SOLR-5205-trunk.patch.
As mentioned above by Shawn and Steve, beyond the id, there is the issue of
needing to escape the terms (also brought up in a comment to SOLR-788).
Instead of escaping these in the TermQuery.toString, the approach in the patch
to SOLR-5521 is to escape these in MoreLikeThis.java, where the BooleanQuery is
being built.
> MoreLikeThis doesn't escape shard queries
> -----------------------------------------
>
> Key: SOLR-5205
> URL: https://issues.apache.org/jira/browse/SOLR-5205
> Project: Solr
> Issue Type: Bug
> Components: MoreLikeThis
> Affects Versions: 4.4
> Reporter: Markus Jelsma
> Fix For: 4.6
>
> Attachments: SOLR-5205-trunk.patch, SOLR-5205.patch
>
>
> MoreLikeThis does not support Lucene special characters as ID in distributed
> search. ID's containing special characters such as URL's need to be escaped
> in the first place. They are then unescaped and get sent to shards in an
> unescaped form, causing the org.apache.solr.search.SyntaxError exception.
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