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https://issues.apache.org/jira/browse/SOLR-974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12667314#action_12667314
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Kay Kay commented on SOLR-974:
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| Note - the onImportEnd event listener is still invoked even if no documents
were created and commit was skipped. I think that is alright.
Is there anything in the Context object that says that the no documents were
created and commit was skipped. Otherwise - onImportEndListener would continue
to execute even if in reality no documents were imported then, that is not so
useful.
> DataImportHandler should not commit if no data has been updated
> ---------------------------------------------------------------
>
> Key: SOLR-974
> URL: https://issues.apache.org/jira/browse/SOLR-974
> Project: Solr
> Issue Type: Improvement
> Components: contrib - DataImportHandler
> Affects Versions: 1.3
> Reporter: Wojtek Piaseczny
> Assignee: Shalin Shekhar Mangar
> Priority: Minor
> Fix For: 1.4
>
> Attachments: SOLR-974.patch, SOLR-974.patch
>
>
> The DataImportHandler always finishes an import with a commit, even if it
> retrieved no data from its data source. Add a short circuit to not commit if
> no data was imported.
> Related discussion:
> http://www.nabble.com/Performance-Hit-for-Zero-Record-Dataimport-td21572935.html
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