[jira] [Created] (SOLR-7128) Two phase distributed search is fetching extra fields in GET_TOP_IDS phase

["Shalin Shekhar Mangar (JIRA)" <ji...@apache.org>]

Shalin Shekhar Mangar created SOLR-7128:
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             Summary: Two phase distributed search is fetching extra fields in GET_TOP_IDS phase
                 Key: SOLR-7128
                 URL: https://issues.apache.org/jira/browse/SOLR-7128
             Project: Solr
          Issue Type: Bug
          Components: search
    Affects Versions: 4.10.3, 4.10.2
            Reporter: Shalin Shekhar Mangar
            Assignee: Shalin Shekhar Mangar
             Fix For: Trunk, 5.1


[~pqueixalos] reported this to me privately so I am creating this issue on his behalf.

{quote}
We found an issue in versions 4.10.+ (4.10.2 and 4.10.3 for sure).

When processing a two phase distributed query with an explicit fl parameter, the two phases are well processed, but the GET_TOP_IDS retrieves the matching documents fields, even if a GET_FIELDS shard request is getting executed just after.

/solr/someCollectionCore?collection=someOtherCollection&q=*:*&debug=true&fl=id,title
=> id is retrieved during GET_TOP_IDS phase that's ok:: it's our uniqueKeyField
=> title is also retrieved during GET_TOP_IDS phase, that's not ok.
{quote}

I'm able to reproduce this. This is pretty bad performance bug that was introduced in SOLR-5768 or it's subsequent related issues. I plan to fix this bug and add substantial tests to assert such things.



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