Erick, It's indeed quite odd. And after I trigger re-indexing all documents (via the normal process of existing program). The duplication is gone. It can not be reproduced easily. But it did occur occasionally and that makes it a frustrating task to troubleshoot.
Thanks, Simon -- View this message in context: http://lucene.472066.n3.nabble.com/Duplicate-Unique-Key-tp4129651p4129701.html Sent from the Solr - User mailing list archive at Nabble.com.