Missing mandatory unique key field error in SolrJ

Question

I\'ve this issue in my project. I read my .xlsx excel file using Apache Poi and I want to index them in my Solr core. I use SolrInputDocument to index reading file. Here is my j

Answer 1

You probably have in your schema a field set as the unique key like this:

<uniqueKey>id</uniqueKey>

The problem is that when you upload a doc, in this case via Apache POI, you are not sending a value for that unique field.

You have a couple options:

1. If you do have a field that will be unique, use it. For example, with a copyField option like:

<copyField source="excel_guaranteed_unique" dest="id"/>

2. As you have the actual document, you could just add a UUID to the "id" field.

3. Create a unique field like a UUID updating your RequestHandlder, like this:

<updateRequestProcessorChain name="uuid" >
    <processor class="solr.UUIDUpdateProcessorFactory">
      <str name="fieldName">id</str>
    </processor>
    ...
</updateRequestProcessorChain>
...    
<requestHandler name="/update" class="solr.UpdateRequestHandler">
    <lst name="defaults">
        <str name="update.chain">uuid</str>
    </lst>
</requestHandler>

You also need to update the extract handler:

 <requestHandler name="/update/extract"
              startup="lazy"
              class="solr.extraction.ExtractingRequestHandler" >
<lst name="defaults">
  ...
  <str name="update.chain">uuid</str>
</lst>