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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-2650) Empty docs array on response with grouping and result pagination
Date Wed, 31 Aug 2011 16:15:10 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2650?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13094651#comment-13094651
] 

Yonik Seeley commented on SOLR-2650:
------------------------------------

There are a few grouping+paging bugs fixed in 3x (which will be 3.4 when released).  Can you
try a recent 3x nightly build and see if any of the problems remain?

> Empty docs array on response with grouping and result pagination
> ----------------------------------------------------------------
>
>                 Key: SOLR-2650
>                 URL: https://issues.apache.org/jira/browse/SOLR-2650
>             Project: Solr
>          Issue Type: Bug
>          Components: search
>    Affects Versions: 3.3
>            Reporter: Massimo Schiavon
>
> Requesting a certain number of rows and setting start parameter to a greater value returns
0 results with grouping enabled.
> For example, requesting:
> http://localhost:8080/solr/web/select/?q=*:*&rows=1&start=2
> (grouping and highlighting are enabled by default)
> I get this response:
> [...]
>       response: {
>           numFound: 117852
>           start: 2
>           docs: [ ]
>       }
>       highlighting: {
>             0938630598: {
>                   title: [ "..." ]
>                   content: [ "..." ]
>             }
>       }
> [...]
> docs array is empty while the highlighted values of the document are present
> Debugging the request in
> org.apache.solr.search.Grouping.Command.createSimpleResponse() at row 534
> [...]
>      int len = Math.min(numGroups, docsGathered);
>       if (offset > len) {
>         len = 0;
>       }
> [...]
> The initial vars values are:
> numGroups = 1
> docsGathered = 3
> offset = 2
> so after the execution len = 0
> I've tried commenting the if statement and this resolves the issue but could introduce
some other bugs.

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