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https://issues.apache.org/jira/browse/SOLR-11517?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16214151#comment-16214151
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David Smiley commented on SOLR-11517:
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By "document updates" do you mean typical document replacement or do you mean
updatable numeric docValues? If the former then you must take care to update
the entire parent/child set together. If the latter... I doubt that's
supported with block-join (parent-child) [~ichattopadhyaya] do you know?
> ToParentBlockJoinQuery fails when the parents/child fall in to different
> segments
> ---------------------------------------------------------------------------------
>
> Key: SOLR-11517
> URL: https://issues.apache.org/jira/browse/SOLR-11517
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 6.6.1
> Reporter: ananthesh
>
> We have a system where all the documents in the collections are nested child
> documents. We also have 'autoCommit' enabled for the collection. We also get
> huge number of document updates. We found a scenario, where 'child' documents
> were indexed in one segment, while 'parent' document got indexed in the other
> segment. Here are the docid looks like
> 0 = 95638
> 1 = 95639
> 2 = 95640
> 3 = 272190 \{parent}
> Now if the solr request has been made using "parent" query parser like the
> following
> {noformat}
> {!parent which=parent:true score=max}(...)
> {noformat}
> ToParentBlockJoinQuery which handles the request wont be able to find the
> parent for the searched child documents. But if we trigger `optimize` for the
> same index which forces to merge all the segments to single index, the above
> request will be able to fetch the results.
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