Solr Error Document is missing mandatory uniqueKey field id

Question

While Importing the data into Solr using DataImportHandler, I am getting the below error. Please someone provide your suggestion.

org.apache.solr.common.SolrException: Document is missing mandatory uniqueKey field: id
        at org.apache.solr.update.AddUpdateCommand.getIndexedId(AddUpdateCommand.java:92)
        at org.apache.solr.update.processor.DistributedUpdateProcessor.versionAdd(DistributedUpdateProcessor.java:717)
        at org.apache.solr.update.processor.DistributedUpdateProcessor.processAdd(DistributedUpdateProcessor.java:557)
        at org.apache.solr.update.processor.LogUpdateProcessor.processAdd(LogUpdateProcessorFactory.java:100)
        at org.apache.solr.handler.dataimport.SolrWriter.upload(SolrWriter.java:70)
        at org.apache.solr.handler.dataimport.DataImportHandler$1.upload(DataImportHandler.java:235)
        at org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:512)
        at org.apache.solr.handler.dataimport.DocBuilder.buildDocument(DocBuilder.java:416)
        at org.apache.solr.handler.dataimport.DocBuilder.doFullDump(DocBuilder.java:331)
        at org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:239)
        at org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:411)
        at org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:483)
        at org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:464)

Answer 1

In the schema.xml file you have mentioned id as required field = true.

Also the document that you are trying to index in SOLR do not contain this id field and hence SOLR is throwing this error.

Solution

1. Either add id to all your documents

OR

2. Remove required = true form schema file for id field.

Please share your schema.xml file and the documents that you are trying to index into SOLR.

Also keep in mind if you want quick response try to provide as much details as you can.

Answer 2

this is probably where the error reporting should be improved for solr

for my case, I've defined a string field not related with KEY, and I am trying to put a null value to that field. I should probably indicate the field is nullable.