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From "Hoss Man (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-8881) test & document (and improve as possible) behavior of TolerantUpdateProcessor while shard splitting is in progress
Date Mon, 21 Mar 2016 23:29:25 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15205357#comment-15205357
] 

Hoss Man commented on SOLR-8881:
--------------------------------

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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