Markus Jelsma created SOLR-4089:
-----------------------------------
Summary: FastVectorHighlighter produces superflouos snippets for
alternateField
Key: SOLR-4089
URL: https://issues.apache.org/jira/browse/SOLR-4089
Project: Solr
Issue Type: Bug
Components: highlighter
Affects Versions: 4.0
Reporter: Markus Jelsma
Fix For: 4.1, 5.0
Highlighter produces multiple snippets for the alternateField when using FVH
only. This only becomes obvious when using using a glob for the hl.fl
parameter. It's easy to reproduce by slighly modifying the example schema.
Add the following fields to the schema. The more name_* fields you add, the
more snippets are produced, one for each field matching the glob. The problem
is only visible if alternateField is specified to any existing field.
{code}
<field name="name_a" type="text_general" indexed="true" stored="true"/>
<field name="name_b" type="text_general" indexed="true" stored="true"/>
<field name="name_c" type="text_general" indexed="true" stored="true"/>
<copyField source="name" dest="name_a"/>
<copyField source="name" dest="name_b"/>
<copyField source="name" dest="name_c"/>
{code}
Index the example data and run the query
{code}
http://localhost:8983/solr/select?q=id:6H500F0&hl=true&hl.fl=name*&hl.alternateField=id&hl.useFastVectorHighlighter=true
{code}
This will produce one snippet for each field that didn't match anyway instead
of emitting only the ID field as alternate.
{code}
<response>
<lst name="responseHeader">
<int name="status">0</int>
<int name="QTime">5</int>
<lst name="params">
<str name="hl.useFastVectorHighlighter">true</str>
<str name="indent">true</str>
<str name="q">id:6H500F0</str>
<str name="hl.alternateField">id</str>
<str name="hl.fl">name*</str>
<str name="hl">true</str>
</lst>
</lst>
<result name="response" numFound="1" start="0">
<doc>
<str name="id">6H500F0</str>
<str name="name">Maxtor DiamondMax 11 - hard drive - 500 GB - SATA-300</str>
<str name="name_a">Maxtor DiamondMax 11 - hard drive - 500 GB -
SATA-300</str>
<str name="name_b">Maxtor DiamondMax 11 - hard drive - 500 GB -
SATA-300</str>
<str name="name_c">Maxtor DiamondMax 11 - hard drive - 500 GB -
SATA-300</str>
<str name="name_d">Maxtor DiamondMax 11 - hard drive - 500 GB -
SATA-300</str>
<str name="manu">Maxtor Corp.</str>
<str name="manu_id_s">maxtor</str>
<arr name="cat">
<str>electronics</str>
<str>hard drive</str>
</arr>
<arr name="features">
<str>SATA 3.0Gb/s, NCQ</str>
<str>8.5ms seek</str>
<str>16MB cache</str>
</arr>
<float name="price">350.0</float>
<str name="price_c">350,USD</str>
<int name="popularity">6</int>
<bool name="inStock">true</bool>
<str name="store">45.17614,-93.87341</str>
<date name="manufacturedate_dt">2006-02-13T15:26:37Z</date>
<long name="_version_">1418796316951052288</long></doc>
</result>
<lst name="highlighting">
<lst name="6H500F0">
<arr name="name">
<str>6H500F0</str>
</arr>
<arr name="name_c">
<str>6H500F0</str>
</arr>
<arr name="name_b">
<str>6H500F0</str>
</arr>
<arr name="name_a">
<str>6H500F0</str>
</arr>
<arr name="name_d">
<str>6H500F0</str>
</arr>
</lst>
</lst>
</response>
{code}
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