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https://issues.apache.org/jira/browse/SOLR-8030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15801285#comment-15801285
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Ludovic Boutros commented on SOLR-8030:
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Thank you [~hossman] for the clarification. And you are right on the request
parameters as well, I did not check the abstract class.
Sorry [~dsmiley] for the misunderstanding ;)
> Transaction log does not store the update chain (or req params?) used for
> updates
> ---------------------------------------------------------------------------------
>
> Key: SOLR-8030
> URL: https://issues.apache.org/jira/browse/SOLR-8030
> Project: Solr
> Issue Type: Bug
> Components: SolrCloud
> Affects Versions: 5.3
> Reporter: Ludovic Boutros
> Attachments: SOLR-8030.patch
>
>
> Transaction Log does not store the update chain, or any other details from
> the original update request such as the request params, used during updates.
> Therefore tLog uses the default update chain, and a synthetic request, during
> log replay.
> If we implement custom update logic with multiple distinct update chains that
> use custom processors after DistributedUpdateProcessor, or if the default
> chain uses processors whose behavior depends on other request params, then
> log replay may be incorrect.
> Potentially problematic scenerios (need test cases):
> * DBQ where the main query string uses local param variables that refer to
> other request params
> * custom Update chain set as {{default="true"}} using something like
> StatelessScriptUpdateProcessorFactory after DUP where the script depends on
> request params.
> * multiple named update chains with diff processors configured after DUP and
> specific requests sent to diff chains -- ex: ParseDateProcessor w/ custom
> formats configured after DUP in some special chains, but not in the default
> chain
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