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https://issues.apache.org/jira/browse/SOLR-7734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14982787#comment-14982787
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Mike Drob commented on SOLR-7734:
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[~gchanan] - did you have any other feedback on this?
> MapReduce Indexer can error when using collection
> -------------------------------------------------
>
> Key: SOLR-7734
> URL: https://issues.apache.org/jira/browse/SOLR-7734
> Project: Solr
> Issue Type: Bug
> Components: contrib - MapReduce
> Affects Versions: 5.2.1
> Reporter: Mike Drob
> Assignee: Gregory Chanan
> Fix For: 5.4, Trunk
>
> Attachments: SOLR-7734.branch5x.patch, SOLR-7734.patch,
> SOLR-7734.patch, SOLR-7734.patch, SOLR-7734.patch, SOLR-7734.patch,
> SOLR-7734.patch, SOLR-7734.patch
>
>
> When running the MapReduceIndexerTool, it will usually pull a
> {{solrconfig.xml}} from ZK for the collection that it is running against.
> This can be problematic for several reasons:
> * Performance: The configuration in ZK will likely have several query
> handlers, and lots of other components that don't make sense in an
> indexing-only use of EmbeddedSolrServer (ESS).
> * Classpath Resources: If the Solr services are using some kind of additional
> service (such as Sentry for auth) then the indexer will not have access to
> the necessary configurations without the user jumping through several hoops.
> * Distinct Configuration Needs: Enabling Soft Commits on the ESS doesn't make
> sense. There's other configurations that
> * Update Chain Behaviours: I'm under the impression that UpdateChains may
> behave differently in ESS than a SolrCloud cluster. Is it safe to depend on
> consistent behaviour here?
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