It is mentioned in cwiki that indexes must not include duplicate data https://cwiki.apache.org/confluence/display/solr/Merging+Indexes
HTH. Thanks, Susheel -----Original Message----- From: Cihad Guzel [mailto:c.guzel....@gmail.com] Sent: Wednesday, March 26, 2014 2:21 PM To: solr-user@lucene.apache.org Subject: index merge hi all. I am trying solr merge index on two collection (solr 4.6.1). There are same index on each collection. I tried as follow: http://localhost:8983/solr/admin/cores?action=mergeindexes&core=collection1&srcCore=collection1&srcCore=collection2 It is successfully. But, Although id is unique key, there are duplicate index after this request. Is this a problem? My query reponse as follow : { "id": "test1", "_version_": 1463652562591809500 }, { "id": "test2", " _version_": 1463653153150861300 }, { "id": "test1", "_version_": 1463652562591809500 } I followed this url: https://wiki.apache.org/solr/MergingSolrIndexes If this situation is normal, should it is specied on wiki ? This e-mail message may contain confidential or legally privileged information and is intended only for the use of the intended recipient(s). Any unauthorized disclosure, dissemination, distribution, copying or the taking of any action in reliance on the information herein is prohibited. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, or contain viruses. Anyone who communicates with us by e-mail is deemed to have accepted these risks. Company Name is not responsible for errors or omissions in this message and denies any responsibility for any damage arising from the use of e-mail. Any opinion defamatory or deemed to be defamatory or any material which could be reasonably branded to be a species of plagiarism and other statements contained in this message and any attachment are solely those of the author and do not necessarily represent those of the company. This e-mail message may contain confidential or legally privileged information and is intended only for the use of the intended recipient(s). Any unauthorized disclosure, dissemination, distribution, copying or the taking of any action in reliance on the information herein is prohibited. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, or contain viruses. Anyone who communicates with us by e-mail is deemed to have accepted these risks. Company Name is not responsible for errors or omissions in this message and denies any responsibility for any damage arising from the use of e-mail. Any opinion defamatory or deemed to be defamatory or any material which could be reasonably branded to be a species of plagiarism and other statements contained in this message and any attachment are solely those of the author and do not necessarily represent those of the company.