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In a single node setup I had auto-generated unique key by using UUID:
<field name="my_id" type="uuid" indexed="true" stored="true" default="NEW" />
Now I want to move to distributed Solr setup, but when I add documents without my_id I get following error:
Document is missing mandatory uniqueKey field: my_id
Does it mean that I need to generate unique key by myself outside of Solr?
Looks like it’s a bug in Solr 4.0 (or Solr Trunk).
There is a JIRA opened on it https://issues.apache.org/jira/browse/SOLR-2796 . The fix has yet to be committed.