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https://issues.apache.org/jira/browse/SOLR-11191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16169411#comment-16169411
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Yonik Seeley commented on SOLR-11191:
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bq. Secondly, even with the routing of parent and child documents were the same
split shards needs to re-index them as a block
It doesn't seem like it should be necessary. It should be enough to just use
the hash of \_root\_ for all of the children and they should still end up
contiguous in the newly created split indexes.
> Shard Split doesn't work on indexes that have nested documents
> --------------------------------------------------------------
>
> Key: SOLR-11191
> URL: https://issues.apache.org/jira/browse/SOLR-11191
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Varun Thacker
>
> The split shard command doesn't split a shard correctly when the index has
> parent-child documents.
> The way split shard works is it goes through all documents id's in that shard
> and then decides which sub-shard would it belong in . It is not aware of the
> parent child relationship during this process
> So the parent-child documents could be orphaned and end up in different shard
> Secondly, even with the routing of parent and child documents were the same
> split shards needs to re-index them as a block
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