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https://issues.apache.org/jira/browse/SOLR-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13937953#comment-13937953
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Steve Rowe commented on SOLR-5875:
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Erick, as I mentioned above, [~alexey] gave it a test run and it fixed the
memory issue he saw.
> 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 [[email protected]] 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/%[email protected]%3e]
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