Oh my yes! I feel a great sense of relief every time an intermittent problem becomes reproducible... The problem is not solved, but at least I have a good feeling that once I don't see it any more it's _really_ gone!
One possibility is index merging, see: https://wiki.apache.org/solr/MergingSolrIndexes. When you merge indexes, there is no duplicate id checking performed, so you can well have duplicates. That's a wild shot in the dark though. Best, Erick On Mon, Apr 7, 2014 at 12:26 PM, Simon <sim...@gallerysystems.com> wrote: > 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.