We have a solr setup from a very old version (1.4) and we are upgrading it to
8.9. We are stuck at the point that I think the schema.xml is syntactically
free of errors but now giving an error:
Caused by: org.apache.solr.common.SolrException: Could not load conf for core
nwr_col: Can't load schema /var/solr/data/nwr_col/conf/schema.xml: _root_ field
must be defined using the exact same fieldType as the uniqueKey field (id)
uses: uuid
We have a field “id”
<field name="id" type="uuid" indexed="true" stored="true" default="NEW"/>
<fieldType name="uuid" class="solr.UUIDField" indexed="true"/>
So I added:
<field name="_root_" type="uuid" indexed="false" stored="false"
docValues="false" default="NEW" />
And now I got the following error:
Caused by: org.apache.solr.common.SolrException: Could not load conf for core
nwr_col: Can't load schema /var/solr/data/nwr_col/conf/schema.xml: [schema.xml]
Duplicate field definition for '_root_'
[[[_root_{type=string,properties=indexed,omitNorms,omitTermFreqAndPositions,sortMissingLast,docValues,useDocValuesAsStored,uninvertible}]]]
and [[[_root_{type=uuid,default=NEW,properties=useDocValuesAsStored}]]]
Sounds like redefining the _root_ field is not allowed.
So I need to know:
1. How can we redefine _root_ to fix the above error?
2. Preferably, is there a way we can disable this parent child document
feature to avoid the need of the _root_ field?
Sorry for such a noob question.
Regards,
Ed.
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