[jira] [Resolved] (SOLR-5875) QueryComponent.mergeIds() unmarshals all docs' sort field values once per doc instead of once per shard

["Steve Rowe (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Rowe resolved SOLR-5875.
------------------------------

    Resolution: Fixed

Committed to trunk, branch_4x and the lucene_solr_4_7 branch.

> QueryComponent.mergeIds() unmarshals all docs' sort field values once per doc instead of once per shard
> -------------------------------------------------------------------------------------------------------
>
>                 Key: SOLR-5875
>                 URL: https://issues.apache.org/jira/browse/SOLR-5875
>             Project: Solr
>          Issue Type: Bug
>          Components: search
>    Affects Versions: 4.7
>            Reporter: Steve Rowe
>            Assignee: Steve Rowe
>            Priority: Critical
>             Fix For: 4.8, 5.0, 4.7.1
>
>         Attachments: SOLR-5875.patch
>
>
> SOLR-5354 added unmarshalling of distributed sort field values in {{QueryComponent.mergeIds()}}, but incorrectly performs this (unmarshalling all docs' sort field values) for every doc, and stores the result with each doc.  This is unnecessary, inefficient, and extremely wasteful of memory.
> In an offline conversation, [~alexey] described the issue to me and located the likely problem, and [~hossman_lucene@fucit.org] located the problem code via inspection.
> This bug is very likely the problem described on the solr-user mailing list here: [SolrCloud constantly crashes after upgrading to Solr 4.7|http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201403.mbox/%3c83f549bdf8deecbc7567c324ee0cb91f@cluster38.e-active.nl%3e]



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