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https://issues.apache.org/jira/browse/SOLR-4016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Otis Gospodnetic updated SOLR-4016:
-----------------------------------
Fix Version/s: 4.1
4.0.1
> Deduplication is broken by partial update
> -----------------------------------------
>
> Key: SOLR-4016
> URL: https://issues.apache.org/jira/browse/SOLR-4016
> Project: Solr
> Issue Type: Bug
> Components: update
> Affects Versions: 4.0
> Environment: Tomcat6 / Catalina on Ubuntu 12.04 LTS
> Reporter: Joel Nothman
> Fix For: 4.0.1, 4.1
>
>
> The SignatureUpdateProcessorFactory used (primarily?) for deduplication does
> not consider partial update semantics.
> The below uses the following solrconfig.xml excerpt:
> {noformat}
> <updateRequestProcessorChain name="text_hash">
> <processor class="solr.processor.SignatureUpdateProcessorFactory">
> <bool name="enabled">true</bool>
> <str name="signatureField">text_hash</str>
> <bool name="overwriteDupes">false</bool>
> <str name="fields">text</str>
> <str name="signatureClass">solr.processor.TextProfileSignature</str>
> </processor>
> <processor class="solr.LogUpdateProcessorFactory" />
> <processor class="solr.RunUpdateProcessorFactory" />
> </updateRequestProcessorChain>
> {noformat}
> Firstly, the processor treats {noformat}{"set": "value"}{noformat} as a
> string and hashes it, instead of the value alone:
> {noformat}
> $ curl '$URL/update?commit=true' -H 'Content-type:application/json' -d
> '{"add":{"doc":{"id": "abcde", "text": {"set": "hello world"}}}}' && curl
> '$URL/select?q=id:abcde'
> {"responseHeader":{"status":0,"QTime":30}}
> <?xml version="1.0" encoding="UTF-8"?><response><lst
> name="responseHeader"><int name="status">0</int><int name="QTime">1</int><lst
> name="params"><str name="q">id:abcde</str></lst></lst><result name="response"
> numFound="1" start="0"><doc><str name="id">abcde</str><str name="text">hello
> world</str><str name="text_hash">ad48c7ad60ac22cc</str><long
> name="_version_">1417247434224959488</long></doc></result>
> </response>
> $
> $ curl '$URL/update?commit=true' -H 'Content-type:application/json' -d
> '{"add":{"doc":{"id": "abcde", "text": "hello world"}}}' && curl
> '$URL/select?q=id:abcde'
> {"responseHeader":{"status":0,"QTime":27}}
> <?xml version="1.0" encoding="UTF-8"?>
> <response>
> <lst name="responseHeader"><int name="status">0</int><int
> name="QTime">1</int><lst name="params"><str
> name="q">id:abcde</str></lst></lst><result name="response" numFound="1"
> start="0"><doc><str name="id">abcde</str><str name="text">hello
> world</str><str name="text_hash">b169c743d220da8d</str><long
> name="_version_">1417248022215000064</long></doc></result>
> </response>
> {noformat}
> Note the different text_hash value.
> Secondly, when updating a field other than those used to create the signature
> (which I imagine is a more common use-case), the signature is recalculated
> from no values:
> {noformat}
> $ curl '$URL/update?commit=true' -H 'Content-type:application/json' -d
> '{"add":{"doc":{"id": "abcde", "title": {"set": "new title"}}}}' && curl
> '$URL/select?q=id:abcde'
> {"responseHeader":{"status":0,"QTime":39}}
> <?xml version="1.0" encoding="UTF-8"?>
> <response>
> <lst name="responseHeader"><int name="status">0</int><int
> name="QTime">1</int><lst name="params"><str
> name="q">id:abcde</str></lst></lst><result name="response" numFound="1"
> start="0"><doc><str name="id">abcde</str><str name="text">hello
> world</str><str name="text_hash">0000000000000000</str><str name="title">new
> title</str><long name="_version_">1417248120480202752</long></doc></result>
> </response>
> {noformat}
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