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https://issues.apache.org/jira/browse/SOLR-2110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12907453#action_12907453
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Yonik Seeley commented on SOLR-2110:
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OK, here's a draft patch that removes any restriction on dereferencing in local
params.
If the first char is a $, then the value will be treated as a parameter name
and dereferenced. The value is read like any other value... may be quoted, etc.
so legal examples are
foo=$a/b/c
foo=$'a/b/c'
> Distributed faceting can create invalid refinement requests when "key" is
> complex
> ---------------------------------------------------------------------------------
>
> Key: SOLR-2110
> URL: https://issues.apache.org/jira/browse/SOLR-2110
> Project: Solr
> Issue Type: Bug
> Reporter: Yonik Seeley
> Priority: Minor
> Attachments: SOLR-2110.patch
>
>
> The NPE described here:
> http://search.lucidimagination.com/search/document/a4c217d153635301
> is due to 2 issues. An exception in a refinement request isn't checked for,
> and a NPE results, masking the original exception.
> The original exception is caused by Solr using local param dereferencing with
> a param name derived from the "key" for that facet.
> If the key is something like "a/b/c" the request fails.
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