Hi, I have created a simple Java application which illustrates this issue.
I am using Solr-Version 5.5.0 and SolrJ. Here is a link to the github repository: https://github.com/sebastianriemer/SolrDuplicateTest The issue I am facing is also described by another person on stackoverflow: http://stackoverflow.com/questions/34253178/solr-doesnt-overwrite-duplicated-uniquekey-entries I would love if any of you could run the test at your place and give me feedback. If you have any questions do not hesitate to write me. Many thanks in advance and best regards, Sebastian Riemer