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https://issues.apache.org/jira/browse/SOLR-9530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15985035#comment-15985035
 ] 

Amrit Sarkar commented on SOLR-9530:
------------------------------------

Yeah it worked. If I put _commitwithin_ anything > 0 say X, and put sleep for Y 
>> X, I don't need to reload or issue commit() and it is working as expected.

Well I also put ModifiableSolrParam, "commit", "true" like we do in a curl 
update. That too is not getting picked for explicit commit by the test.

{code}
 AddUpdateCommand cmd = new AddUpdateCommand(new 
LocalSolrQueryRequest(h.getCore(),
        new ModifiableSolrParams()
            .add("processor", "Atomic")
            .add("Atomic.cat", "delete")
            .add("commit","true")
    ));
{code}
{code}
factory.getInstance(cmd.getReq(), new SolrQueryResponse(),
                new DistributedUpdateProcessor(cmd.getReq(), new 
SolrQueryResponse(),
                    new RunUpdateProcessor(cmd.getReq(), 
null))).processAdd(cmd);
{code}

I like the stop-gap loop, retries are better, will incorporate this. Thank you.


> Add an Atomic Update Processor 
> -------------------------------
>
>                 Key: SOLR-9530
>                 URL: https://issues.apache.org/jira/browse/SOLR-9530
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Varun Thacker
>         Attachments: SOLR-9530.patch, SOLR-9530.patch, SOLR-9530.patch, 
> SOLR-9530.patch, SOLR-9530.patch, SOLR-9530.patch, SOLR-9530.patch, 
> SOLR-9530.patch, SOLR-9530.patch, SOLR-9530.patch, SOLR-9530.patch
>
>
> I'd like to explore the idea of adding a new update processor to help ingest 
> partial updates.
> Example use-case - There are two datasets with a common id field. How can I 
> merge both of them at index time?
> Proposed Solution: 
> {code}
> <updateRequestProcessorChain name="atomic">
>   <processor class="solr.processor.AtomicUpdateProcessorFactory">
>     <str name="my_new_field">add</str>
>   </processor>
>   <processor class="solr.LogUpdateProcessorFactory" />
>   <processor class="solr.RunUpdateProcessorFactory" />
> </updateRequestProcessorChain>
> {code}
> So the first JSON dump could be ingested against 
> {{http://localhost:8983/solr/gettingstarted/update/json}}
> And then the second JSON could be ingested against
> {{http://localhost:8983/solr/gettingstarted/update/json?processor=atomic}}
> The Atomic Update Processor could support all the atomic update operations 
> currently supported.



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