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https://issues.apache.org/jira/browse/LUCENE-4882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13614607#comment-13614607
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crocket edited comment on LUCENE-4882 at 3/26/13 10:16 PM:
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1) I have a facet "me" that doesn't have a subcategory. Does it mean I need to
modify CountingListBuilder as well as FacetsAccumulator or just use
StandardFacetsAccumulator?
2) I tried to use StandardFacetsAccumulator, but
FacetsCollector.getFacetResults still throws
"java.lang.ArrayIndexOutOfBoundsException: 0"
FacetsAccumulator sfa=StandardFacetsAccumulator.create(fsp,
searcher.getIndexReader(), taxoReader);
FacetsCollector fc = FacetsCollector.create(sfa);
Does it mean I need to apply your patch to my project?
was (Author: crocket):
I have a facet "me" that doesn't have a subcategory. Does it mean I need to
modify CountingListBuilder as well as FacetsAccumulator or just use
StandardFacetsAccumulator?
> FacetsAccumulator.java:185 throws NullPointerException if it's given an empty
> CategoryPath.
> -------------------------------------------------------------------------------------------
>
> Key: LUCENE-4882
> URL: https://issues.apache.org/jira/browse/LUCENE-4882
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/facet
> Affects Versions: 4.2
> Reporter: crocket
> Assignee: Shai Erera
> Priority: Critical
> Fix For: 5.0, 4.3
>
> Attachments: LUCENE-4882.patch
>
>
> When I wanted to count root categories, I used to pass "new CategoryPath(new
> String[0])" to a CountFacetRequest.
> Since upgrading lucene from 4.1 to 4.2, that threw
> ArrayIndexOfOutBoundsException, so I passed CategoryPath.EMPTY to a
> CountFacetRequest instead, and this time I got NullPointerException.
> It all originates from FacetsAccumulator.java:185
> Does someone conspire to prevent others from counting root categories?
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