Hoss Man created SOLR-8881:
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Summary: test & document (and improve as possible) behavior of
TolerantUpdateProcessor while shard splitting is in progress
Key: SOLR-8881
URL: https://issues.apache.org/jira/browse/SOLR-8881
Project: Solr
Issue Type: Improvement
Reporter: Hoss Man
TolerantUpdateProcessor is being added in SOLR-445 but it's not entirely
obvious what the behavior should be when using something like this is used in
conjunction with Shard Splitting.
In particular what should / shouldn't happen if an update error occurs on a
subShardLeader (while the shard is actively being split) after the update
already succeded on the original shard leader. when TUP is not used, this
error is propogated back to the client -- but if TUP is being used, then should
the subShardLeader' error be propogated back as a tolerated error, or a hard
failure?
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