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https://issues.apache.org/jira/browse/SOLR-4486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13583733#comment-13583733
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vinay pothnis commented on SOLR-4486:
-------------------------------------

The solr-users mailing list thread for reference: 
http://lucene.472066.n3.nabble.com/solr-cloud-4-1-Issue-with-order-in-a-batch-of-commands-td4041367.html
                
> The order of commands is not maintained in a batch of adds/updates and deletes
> ------------------------------------------------------------------------------
>
>                 Key: SOLR-4486
>                 URL: https://issues.apache.org/jira/browse/SOLR-4486
>             Project: Solr
>          Issue Type: Bug
>          Components: update
>    Affects Versions: 4.1
>            Reporter: vinay pothnis
>
> I have the following set up: 
> * solr cloud 4.1.0 
> * 2 shards with embedded zookeeper 
> * plain http to communicate with solr 
> I am testing a scenario where i am batching multiple commands and sending 
> to solr. Since this is the solr cloud setup, I am always sending the 
> updates to one of the nodes in the cloud. 
> e.g.: http://localhost:8983/solr/sample/update
> *example set of commands:* 
> {"add": {"doc": 
> {"field-1":"1359591340025","field-2":1361301249330,"doc_id":"e.1.78"} 
> },"add": {"doc": 
> {"field-1":"1360089709282","field-2":1361301249377,"doc_id":"e.1.78"} 
> },"delete": { "id": "e.1.78" }} 
> When I include deletes and updates in the batch, sometimes, the order of 
> the commands is not maintained. 
> Specifically, if the document does not belong to the shard that I am 
> communicating with (lets say shard-1), then shard-1 sends the commands to 
> "shard-2". In this case, the "deletes" are sent first and then the updates. 
> This changes the order that I originally sent. 
> Thanks! 
> Vinay 

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