[SOLVED] SOLR MoreLikeThis with date field returns Invalid Date String

SOLR MoreLikeThis with date field returns Invalid Date String

Tested with SOLR 6.6.6 and now with SOLR 7.7.3 we get the following error:

  "error":{
"metadata":[
  "error-class","org.apache.solr.common.SolrException",
  "root-error-class","org.apache.solr.common.SolrException"],
"msg":"Invalid Date String:'1604016000000'",
"code":400}}

The field type is this:

<fieldType name="date" class="solr.DatePointField" sortMissingLast="true" omitNorms="true"/>

and the field:

<field name="publicationDate" type="date" indexed="true" stored="true" termVectors="true" termPositions="true" termOffsets="true"/>

The search itself is: http://localhost:8091/solr/en/select?fl=id,uuid,referenceNumber,title,publicationDate&mlt=true&mlt.fl=referenceNumber,title,publicationDate&q=id:1282

The dates are correct in our index - we have checked them many times.

Does anyone have an idea what we are doing wrong?

Solution