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From OTH <>
Subject Auto-generate unique key when adding documents from SolrJ
Date Sun, 26 Feb 2017 15:11:29 GMT
Hello all,

First of all, I am very new to Solr.

I am using Solr version 6.4.1.  I have a Solr core (non-cloud), where there
is a mandatory unique key field called "id".

I am trying to add documents to the core from Java, without having to
specify the "id" field explicitly; i.e. to have it auto-generated.

I learned that this is possible by including the following information in
the conf/solrconfig.xml file:

> <updateRequestProcessorChain name="add-unknown-fields-to-the-schema">
>     <!-- UUIDUpdateProcessorFactory will generate an id if none is present
> in the incoming document -->
>     <processor class="solr.UUIDUpdateProcessorFactory">
> <str name="fieldName">id</str>
>   </processor>
>     ...
>     <processor class="solr.LogUpdateProcessorFactory"/>
>     <processor class="solr.DistributedUpdateProcessorFactory"/>
>     <processor class="solr.RunUpdateProcessorFactory"/>
>   </updateRequestProcessorChain>

(I did restart the server after adding the above text to the xml file.)

However, when I try to add documents from Java using SolrJ (without
specifying the "id" field), I get the following exception:

> Exception in thread "main"
> org.apache.solr.client.solrj.impl.HttpSolrClient$RemoteSolrException: Error
> from server at http://localhost:8983/solr/sales_history: Document is
> missing mandatory uniqueKey field: id

My Java code is like this:

> SolrClient solr = new HttpSolrClient.Builder(SOLR_URL).build();
> SolrInputDocument document = new SolrInputDocument();
> document.addField(..., ...);
> document.addField(..., ...);
> UpdateResponse updateResponse = solr.add(document);

The exception is thrown from the last line above.

Is there any way to add documents from Java and have the uniqueKey field be

Thank you

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