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https://issues.apache.org/jira/browse/SOLR-8881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15205357#comment-15205357
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Hoss Man commented on SOLR-8881:
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I spoke briefly with [~shalinmangar] about this issue offline and he said he
would try to find some time to think about what the ideal behavior should look
like, and how to write a test for it. Pinging him here in the hopes he'll add
some comments with his thoughts.
> 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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