David Smiley created SOLR-15064:
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Summary: Atomic/partial updates to nested docs is incompatible
with implicit doc router
Key: SOLR-15064
URL: https://issues.apache.org/jira/browse/SOLR-15064
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Reporter: David Smiley
Doing an atomic/partial update to a child doc requires that the update be
routed to the proper shard despite the doc having an ID different than the root
doc that it's associated with. Our solution for that was to use the
{{_route_}} param to supply the root document ID. What we overlooked was the
fact that implicit routers rely on that parameter to identify the shard by
name. Consequently, these two features are incompatible.
I think we must insist that such updates include the {{_root_}} field in the
document, and take care to exclude it when applying in-place updates (as its
presence would disrupt the ability to do an in-place update). Furthermore,
ensure that CloudSolrClient and Solr itself can route updates appropriately
based on the {{_root_}} field.
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