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https://issues.apache.org/jira/browse/SOLR-7535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15075917#comment-15075917
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Joel Bernstein commented on SOLR-7535:
--------------------------------------

[~caomanhdat], Adding fault tolerance is going to be important. But I think it 
will require quite a bit of thought to get right. Possibly we should have a 
separate ticket specifically for adding fault tolerance to the Streaming API. 
In that ticket we can discuss the different possible failures that can occur 
and how those failures can be handled.

> Add UpdateStream to Streaming API and Streaming Expression
> ----------------------------------------------------------
>
>                 Key: SOLR-7535
>                 URL: https://issues.apache.org/jira/browse/SOLR-7535
>             Project: Solr
>          Issue Type: New Feature
>          Components: clients - java, SolrJ
>            Reporter: Joel Bernstein
>            Priority: Minor
>         Attachments: SOLR-7535.patch, SOLR-7535.patch
>
>
> The ticket adds an UpdateStream implementation to the Streaming API and 
> streaming expressions. The UpdateStream will wrap a TupleStream and send the 
> Tuples it reads to a SolrCloud collection to be indexed.
> This will allow users to pull data from different Solr Cloud collections, 
> merge and transform the streams and send the transformed data to another Solr 
> Cloud collection.



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