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https://issues.apache.org/jira/browse/LUCENE-5978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153274#comment-14153274
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ASF subversion and git services commented on LUCENE-5978:
---------------------------------------------------------
Commit 1628468 from [~rcmuir] in branch 'dev/branches/branch_5x'
[ https://svn.apache.org/r1628468 ]
LUCENE-5978: don't write a norm of infinity when analyzer returns no tokens
> don't write a norm of infinity when analyzer returns no tokens
> --------------------------------------------------------------
>
> Key: LUCENE-5978
> URL: https://issues.apache.org/jira/browse/LUCENE-5978
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Fix For: 5.0, Trunk
>
> Attachments: LUCENE-5978.patch
>
>
> When a document doesn't have the field, we fill with zero. when a segment
> doesn't have the field, we also fill with zero.
> however, when the analyzer doesn't return any terms for the field, we still
> call similarity.computeNorm(0)... with the default similarity this encodes
> infinity... -1
> in such a case, it doesnt really matter what the norm is, since it has no
> terms. But its more efficient for e.g. compression if we consistently use
> zero.
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